Mercedes-Benz Vehicle Models Mercedes S-Class 2014-2020
Mercedes-Benz Vehicle Models Mercedes S-Class 2014-2020 Torque Specifications
Complete Mercedes-Benz Vehicle Models Mercedes S-Class 2014-2020 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.
Updated
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
Prevention:
Always use a calibrated torque wrench and follow specifications exactly.
Incorrect Torque Sequence
Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.
Prevention:
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
Prevention:
Clean and inspect all threads before assembly. Use new thread locker if specified.
Reusing TTY Bolts
Torque-to-yield bolts are designed to stretch and must not be reused.
Prevention:
Always replace TTY bolts with new ones. They are single-use only.
Dry vs. Lubricated
Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.
Prevention:
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Range: 2-25 ft-lbs
Small fasteners, delicate components
Torque Wrench (3/8" Drive)
Range: 10-100 ft-lbs
Most common automotive fasteners
Torque Wrench (1/2" Drive)
Range: 30-250 ft-lbs
Large fasteners, wheels
Angle Gauge
Torque-to-yield (TTY) bolts
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
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Torque Calculator
Convert between different torque units
3.0l Engine
Torque specifications for 3.0L Engine
3.0l Engine
Torque specifications for 3.0L Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
1
Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 18 ft-lbs (24 N·m)
2. 90°
Important Notes
Follow the manufacturer's torque sequence diagram. Final torque is achieved by turning the bolts an additional 90 degrees.
2 Valve Cover Bolts
M6 x 1.0
2
Valve Cover Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Follow the manufacturer's torque sequence diagram. Ensure the crankshaft rotates freely after tightening.
2 Connecting Rod Nuts
M8 x 1.25
2
Connecting Rod Nuts
M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed and lubricated.
Timing System
1 Camshaft Sprocket Bolt
M10 x 1.5
1
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2 Timing Chain Tensioner Bolt
M8 x 1.25
2
Timing Chain Tensioner Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the tensioner is properly seated before tightening.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2 Oil Drain Plug
M14 x 1.5
2
Oil Drain Plug
M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Replace the crush washer to ensure a proper seal.
3.0l V6 Engine
Torque specifications for 3.0L-V6 Engine
3.0l V6 Engine
Torque specifications for 3.0L-V6 Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
1
Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 18 ft-lbs (24 N·m)
2. 90°
Important Notes
Follow the manufacturer's torque sequence diagram. Final torque is achieved by turning the bolts an additional 90 degrees.
2 Valve Cover Bolts
M6 x 1.0
2
Valve Cover Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Follow the manufacturer's torque sequence diagram. Ensure the crankshaft rotates freely after tightening.
2 Connecting Rod Nuts
M8 x 1.25
2
Connecting Rod Nuts
M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed and lubricated.
Timing System
1 Camshaft Sprocket Bolt
M10 x 1.5
1
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2 Timing Chain Tensioner Bolt
M8 x 1.25
2
Timing Chain Tensioner Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the tensioner is properly seated before tightening.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2 Oil Drain Plug
M14 x 1.5
2
Oil Drain Plug
M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Replace the crush washer to ensure a proper seal.
4.7l Engine
Torque specifications for 4.7L Engine
4.7l Engine
Torque specifications for 4.7L Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29.2 N·m)
Important Notes
Estimated average value between 18-25 ft-lbs (24-34 nm)
2 Engine Block to Transmission Mounting Bolts
M14 x 1.5
2
Engine Block to Transmission Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value between 40-50 ft-lbs (54-68 nm)
Main Bearings and Crankshaft
1 Main Bearing Bolts
M16 x 1.5
1
Main Bearing Bolts
M16 x 1.5
Torque Specification
60 ft-lbs (81.4 N·m)
Important Notes
Estimated average value between 55-65 ft-lbs (75-88 nm)
2 Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
Torque Specification
85 ft-lbs (115.1 N·m)
Important Notes
Estimated average value between 81-89 ft-lbs (110-121 nm)
Valvetrain and Timing System
1 Valve Cover Bolts
M8 x 1.25
1
Valve Cover Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
2 Timing Belt/Chain Tensioner Bolt
M10 x 1.25
2
Timing Belt/Chain Tensioner Bolt
M10 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated average value between 15-20 ft-lbs (20-27 nm)
Fuel System
1 Fuel Injector Bolts
M6 x 1.0
1
Fuel Injector Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
2 Fuel Rail Bolts
M8 x 1.25
2
Fuel Rail Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
Exhaust System
1 Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
21.5 ft-lbs (29.2 N·m)
Important Notes
Estimated average value between 18-25 ft-lbs (24-34 nm)
Oil System
1 Oil Pan Bolts
M10 x 1.25
1
Oil Pan Bolts
M10 x 1.25
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value between 80-100 in-lbs (9-11 nm)
2 Oil Filter Housing Bolt
M12 x 1.5
2
Oil Filter Housing Bolt
M12 x 1.5
Torque Specification
21.5 ft-lbs (29.2 N·m)
Important Notes
Estimated average value between 18-25 ft-lbs (24-34 nm)
4.7l V8 Engine
Torque specifications for 4.7L-V8 Engine
4.7l V8 Engine
Torque specifications for 4.7L-V8 Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29.2 N·m)
Important Notes
Estimated average value between 18-25 ft-lbs (24-34 nm)
2 Engine Block to Transmission Mounting Bolts
M14 x 1.5
2
Engine Block to Transmission Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value between 40-50 ft-lbs (54-68 nm)
Main Bearings and Crankshaft
1 Main Bearing Bolts
M16 x 1.5
1
Main Bearing Bolts
M16 x 1.5
Torque Specification
60 ft-lbs (81.4 N·m)
Important Notes
Estimated average value between 55-65 ft-lbs (75-88 nm)
2 Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
Torque Specification
85 ft-lbs (115.1 N·m)
Important Notes
Estimated average value between 81-89 ft-lbs (110-121 nm)
Valvetrain and Timing System
1 Valve Cover Bolts
M8 x 1.25
1
Valve Cover Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
2 Timing Belt/Chain Tensioner Bolt
M10 x 1.25
2
Timing Belt/Chain Tensioner Bolt
M10 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated average value between 15-20 ft-lbs (20-27 nm)
Fuel System
1 Fuel Injector Bolts
M6 x 1.0
1
Fuel Injector Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
2 Fuel Rail Bolts
M8 x 1.25
2
Fuel Rail Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
Exhaust System
1 Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
21.5 ft-lbs (29.2 N·m)
Important Notes
Estimated average value between 18-25 ft-lbs (24-34 nm)
Oil System
1 Oil Pan Bolts
M10 x 1.25
1
Oil Pan Bolts
M10 x 1.25
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value between 80-100 in-lbs (9-11 nm)
2 Oil Filter Housing Bolt
M12 x 1.5
2
Oil Filter Housing Bolt
M12 x 1.5
Torque Specification
21.5 ft-lbs (29.2 N·m)
Important Notes
Estimated average value between 18-25 ft-lbs (24-34 nm)
6.0l Engine
Torque specifications for 6.0L Engine
6.0l Engine
Torque specifications for 6.0L Engine
Cylinder Head and Valve Train
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
2 Valve Cover Bolts
M8 x 1.25
2
Valve Cover Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
3 Rocker Arms/Shafts Bolts
M10 x 1.5
3
Rocker Arms/Shafts Bolts
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
Engine Block and Main Bearings
1 Main Bearing Bolts
M14 x 2.0
1
Main Bearing Bolts
M14 x 2.0
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated average value from 55-65 ft-lbs range.
2 Engine Block to Transmission Mounting Bolts
M12 x 1.75
2
Engine Block to Transmission Mounting Bolts
M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from 40-50 ft-lbs range.
3 Engine Block to Engine Mounting Bolts
M10 x 1.5
3
Engine Block to Engine Mounting Bolts
M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs range.
Crankshaft and Connecting Rods
1 Connecting Rod Nuts
M12 x 1.75
1
Connecting Rod Nuts
M12 x 1.75
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated average value from 37-43 ft-lbs range.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 2.0
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 2.0
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Estimated average value from 81-89 ft-lbs range.
Timing and Accessory Components
1 Timing Belt/Chain Tensioner Bolt
M10 x 1.5
1
Timing Belt/Chain Tensioner Bolt
M10 x 1.5
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average value from 15-20 ft-lbs range.
2 Camshaft Sprocket Bolt
M12 x 1.75
2
Camshaft Sprocket Bolt
M12 x 1.75
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated average value from 35-45 ft-lbs range.
Oil and Cooling Systems
1 Oil Pan Bolts
M8 x 1.25
1
Oil Pan Bolts
M8 x 1.25
Torque Specification
90 ft-lbs (10 N·m)
Important Notes
Estimated average value from 80-100 in-lbs range, converted to ft-lbs.
2 Oil Filter Housing Bolt
M10 x 1.5
2
Oil Filter Housing Bolt
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
3 Water Pump Bolts
M8 x 1.25
3
Water Pump Bolts
M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated average value from 10-12 ft-lbs range.
Intake and Exhaust Systems
1 Intake Manifold to Engine Block Bolts
M10 x 1.5
1
Intake Manifold to Engine Block Bolts
M10 x 1.5
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average value from 15-20 ft-lbs range.
2 Exhaust Manifold to Engine Block Bolts
M10 x 1.5
2
Exhaust Manifold to Engine Block Bolts
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
6.0l V12 Engine
Torque specifications for 6.0L-V12 Engine
6.0l V12 Engine
Torque specifications for 6.0L-V12 Engine
Cylinder Head and Valve Train
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
2 Valve Cover Bolts
M8 x 1.25
2
Valve Cover Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
3 Rocker Arms/Shafts Bolts
M10 x 1.5
3
Rocker Arms/Shafts Bolts
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
Engine Block and Main Bearings
1 Main Bearing Bolts
M14 x 2.0
1
Main Bearing Bolts
M14 x 2.0
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated average value from 55-65 ft-lbs range.
2 Engine Block to Transmission Mounting Bolts
M12 x 1.75
2
Engine Block to Transmission Mounting Bolts
M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from 40-50 ft-lbs range.
3 Engine Block to Engine Mounting Bolts
M10 x 1.5
3
Engine Block to Engine Mounting Bolts
M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs range.
Crankshaft and Connecting Rods
1 Connecting Rod Nuts
M12 x 1.75
1
Connecting Rod Nuts
M12 x 1.75
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated average value from 37-43 ft-lbs range.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 2.0
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 2.0
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Estimated average value from 81-89 ft-lbs range.
Timing and Accessory Components
1 Timing Belt/Chain Tensioner Bolt
M10 x 1.5
1
Timing Belt/Chain Tensioner Bolt
M10 x 1.5
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average value from 15-20 ft-lbs range.
2 Camshaft Sprocket Bolt
M12 x 1.75
2
Camshaft Sprocket Bolt
M12 x 1.75
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated average value from 35-45 ft-lbs range.
Oil and Cooling Systems
1 Oil Pan Bolts
M8 x 1.25
1
Oil Pan Bolts
M8 x 1.25
Torque Specification
90 ft-lbs (10 N·m)
Important Notes
Estimated average value from 80-100 in-lbs range, converted to ft-lbs.
2 Oil Filter Housing Bolt
M10 x 1.5
2
Oil Filter Housing Bolt
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
3 Water Pump Bolts
M8 x 1.25
3
Water Pump Bolts
M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated average value from 10-12 ft-lbs range.
Intake and Exhaust Systems
1 Intake Manifold to Engine Block Bolts
M10 x 1.5
1
Intake Manifold to Engine Block Bolts
M10 x 1.5
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average value from 15-20 ft-lbs range.
2 Exhaust Manifold to Engine Block Bolts
M10 x 1.5
2
Exhaust Manifold to Engine Block Bolts
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average value from 18-25 ft-lbs range.
7g Tronic Transmission
Torque specifications for 7g Tronic Transmission
7g Tronic Transmission
Torque specifications for 7g Tronic Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.75 (estimated)
1
Transmission Mounting Bolts
M12 x 1.75 (estimated)
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value, consult repair manual for accurate information.
Transmission Oil Pan
1 Transmission Oil Pan Bolts
M8 x 1.25
1
Transmission Oil Pan Bolts
M8 x 1.25
Torque Specification
90 in-lbs (10 N·m)
Transmission Fluid System
1 Transmission Fluid Drain/Fill Plug
M18 x 1.5 (estimated)
1
Transmission Fluid Drain/Fill Plug
M18 x 1.5 (estimated)
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value, consult repair manual for accurate information.
7G Tronic Transmission Pan
1 7G-Tronic Transmission Pan Bolts
M8 x 1.25
1
7G-Tronic Transmission Pan Bolts
M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
General knowledge of 7G-Tronic transmission system, may vary depending on application.
7G Tronic Transmission Filter
1 7G-Tronic Transmission Filter Bolts
M6 x 1.0
1
7G-Tronic Transmission Filter Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
General knowledge of 7G-Tronic transmission system, may vary depending on application.
7G Tronic Transmission Cooler Line
1 7G-Tronic Transmission Cooler Line Fittings
M10 x 1.5 (estimated)
1
7G-Tronic Transmission Cooler Line Fittings
M10 x 1.5 (estimated)
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value, consult repair manual for accurate information.
7G Tronic Transmission Solenoid
1 7G-Tronic Transmission Solenoid Bolts
M5 x 0.8
1
7G-Tronic Transmission Solenoid Bolts
M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
General knowledge of 7G-Tronic transmission system, may vary depending on application.
Body
Torque specifications for Body
Body
Torque specifications for Body
Fuel System
1 Fuel Tank Strap Bolts
M8 x 1.25
1
Fuel Tank Strap Bolts
M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value based on typical M8 bolt torque specifications for fuel tank straps.
2 Fuel Filler Neck Bolts
M6 x 1.0
2
Fuel Filler Neck Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications for fuel filler necks.
Safety System
1 Seat Belt Anchorage Bolts
M10 x 1.5
1
Seat Belt Anchorage Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on typical M10 bolt torque specifications for seat belt anchorage.
2 Seat Mounting Bolts
M12 x 1.75
2
Seat Mounting Bolts
M12 x 1.75
Torque Specification
1. 25 ft-lbs (34 N·m)
2. 90°
Important Notes
Estimated value based on typical M12 bolt torque specifications for seat mounting.
Body Panels
1 Door Hinge Bolts
M8 x 1.25
1
Door Hinge Bolts
M8 x 1.25
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated value based on typical M8 bolt torque specifications for door hinges.
2 Body Panel Bolts
M6 x 1.0
2
Body Panel Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications for body panels.
3 Roof Rail Bolts
M8 x 1.25
3
Roof Rail Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated value based on typical M8 bolt torque specifications for roof rails.
4 Bumper Mounting Bolts
M10 x 1.5
4
Bumper Mounting Bolts
M10 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated value based on typical M10 bolt torque specifications for bumper mounts.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Caliper
1 Brake Caliper Bolts
M12 x 1.5
1
Brake Caliper Bolts
M12 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated value based on typical brake caliper bolt torque. Ensure proper alignment of the caliper during installation.
2 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
2
Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Torque Specification
110 ft-lbs (149 N·m)
Important Notes
Estimated value based on typical mounting bracket bolt torque. Ensure the bracket is securely attached to the steering knuckle or axle.
Brake Disc Drum
1 Brake Disc/Drum Retaining Bolts
M10 x 1.25
1
Brake Disc/Drum Retaining Bolts
M10 x 1.25
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated value based on typical disc/drum retaining bolt torque. Ensure the disc/drum is properly seated on the hub.
Brake Hydraulics
1 Brake Hose Banjo Bolt
M10 x 1.0
1
Brake Hose Banjo Bolt
M10 x 1.0
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Estimated value based on typical banjo bolt torque. Ensure the sealing washers are properly installed.
2 Brake Master Cylinder Mounting Bolts
M8 x 1.25
2
Brake Master Cylinder Mounting Bolts
M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical master cylinder bolt torque. Ensure the master cylinder is properly aligned with the brake booster.
3 Brake Booster Mounting Bolts
M8 x 1.25
3
Brake Booster Mounting Bolts
M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical booster mounting bolt torque. Ensure the booster is properly aligned with the firewall.
Brake Pedal
1 Brake Pedal Pivot Bolt
M10 x 1.25
1
Brake Pedal Pivot Bolt
M10 x 1.25
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Estimated value based on typical pedal pivot bolt torque. Ensure the pedal operates smoothly after installation.
Abs System
1 ABS Sensor Mounting Bolts
M6 x 1.0
1
ABS Sensor Mounting Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on typical ABS sensor bolt torque. Ensure the sensor is properly aligned with the tone ring.
Wheel Assembly
1 Wheel Lug Nuts
M14 x 1.5
1
Wheel Lug Nuts
M14 x 1.5
Torque Specification
110 ft-lbs (149 N·m)
Important Notes
Estimated value based on typical wheel lug nut torque. Ensure the wheel is properly seated on the hub.
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated average value from 55-65 ft-lbs (75-88 nm) range.
2 Connecting Rod Nuts
M12 x 1.25
2
Connecting Rod Nuts
M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated average value from 37-43 ft-lbs (50-58 nm) range.
3 Flywheel Bolts
M14 x 1.5
3
Flywheel Bolts
M14 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated average value from 55-65 ft-lbs (75-88 nm) range.
4 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
4
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Estimated average value from 81-89 ft-lbs (110-121 nm) range.
Transmission
1 Transmission Mounting Bolts
M12 x 1.25
1
Transmission Mounting Bolts
M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs (41-54 nm) range.
2 Transmission Oil Pan Bolts
M10 x 1.0
2
Transmission Oil Pan Bolts
M10 x 1.0
Torque Specification
90 in-lbs (10 N·m)
Important Notes
Estimated average value from 80-100 in-lbs (9-11 nm) range.
Driveshaft and Axles
1 Drive Axle/Half Shaft Bolts
M16 x 1.5
1
Drive Axle/Half Shaft Bolts
M16 x 1.5
Torque Specification
162 ft-lbs (219 N·m)
Important Notes
Estimated average value from 147-177 ft-lbs (199-240 nm) range.
2 CV Joint/Axle Nut
M18 x 1.5
2
CV Joint/Axle Nut
M18 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Estimated average value from 148-184 ft-lbs (200-250 nm) range.
3 Propeller/Drive Shaft Bolts
M12 x 1.25
3
Propeller/Drive Shaft Bolts
M12 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated average value from 13-16 ft-lbs (18-22 nm) range.
Differential and Transfer Case
1 Differential Cover Bolts
M12 x 1.25
1
Differential Cover Bolts
M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs (41-54 nm) range.
2 Transfer Case Mounting Bolts
M12 x 1.25
2
Transfer Case Mounting Bolts
M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs (41-54 nm) range.
3 Driveshaft Center Bearing Bolts
M10 x 1.0
3
Driveshaft Center Bearing Bolts
M10 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated average value from 20-25 ft-lbs (27-34 nm) range.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Alternator And Starter Motor
1 Alternator Mounting Bolts
M10 x 1.5
1
Alternator Mounting Bolts
M10 x 1.5
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated average value between 15-20 ft-lbs (20-27 nm)
2 Starter Motor Mounting Bolts
M12 x 1.75
2
Starter Motor Mounting Bolts
M12 x 1.75
Torque Specification
31.5 ft-lbs (42.7 N·m)
Important Notes
Estimated average value between 27-36 ft-lbs (37-49 nm)
Battery And Grounding
1 Battery Terminal Nuts
M8 x 1.25
1
Battery Terminal Nuts
M8 x 1.25
Torque Specification
6 ft-lbs (8.1 N·m)
Important Notes
Estimated average value between 5-7 ft-lbs (7-10 nm)
2 Ground Strap Bolts
M10 x 1.5
2
Ground Strap Bolts
M10 x 1.5
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated average value between 10-15 ft-lbs (14-20 nm)
Ignition And Electrical Connectors
1 Ignition Coil Bolt
M8 x 1.25
1
Ignition Coil Bolt
M8 x 1.25
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated average value between 7-9 ft-lbs (10-12 nm)
2 Electrical Connector Bolts
M6 x 1
2
Electrical Connector Bolts
M6 x 1
Torque Specification
7.5 ft-lbs (10.2 N·m)
Important Notes
Estimated average value between 5-10 ft-lbs (7-14 nm)
Fuses And Relays
1 Fuses and Relays Mounting Bolts
M6 x 1
1
Fuses and Relays Mounting Bolts
M6 x 1
Torque Specification
7.5 ft-lbs (10.2 N·m)
Important Notes
Estimated average value between 5-10 ft-lbs (7-14 nm)
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Exhaust Manifold Headers
1 Exhaust Manifold/Headers Bolts
M8 x 1.25
1
Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure a tight seal to prevent exhaust gas leaks.
Exhaust Pipe Connections
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure a secure connection to prevent exhaust leaks.
2 Catalytic Converter to Exhaust Pipe Bolts
M8 x 1.25
2
Catalytic Converter to Exhaust Pipe Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure a secure connection to prevent leaks and maintain catalytic converter efficiency.
Emissions Control Components
1 EGR Valve Bolts
M6 x 1.0
1
EGR Valve Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure a secure fit to prevent leaks and maintain EGR system function.
2 Oxygen Sensor (Lambda Sensor) Mounting
M12 x 1.5
2
Oxygen Sensor (Lambda Sensor) Mounting
M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on similar components. Ensure a secure fit to prevent exhaust leaks.
3 NOx Sensor Mounting
M8 x 1.25
3
NOx Sensor Mounting
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on similar components. Ensure a secure connection to prevent leaks.
4 DPF (Diesel Particulate Filter) Mounting Bolts
M8 x 1.25
4
DPF (Diesel Particulate Filter) Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure a secure fit to prevent leaks and maintain DPF performance.
5 Exhaust Gas Temperature Sensor Mounting
M6 x 1.0
5
Exhaust Gas Temperature Sensor Mounting
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure a secure fit to prevent leaks.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold Headers
1 Exhaust Manifold/Headers to Engine Block Bolts
M12 x 1.5
1
Exhaust Manifold/Headers to Engine Block Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average torque value from the provided range.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M12 x 1.5
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average torque value from the provided range.
Exhaust Pipe
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M12 x 1.5
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average torque value from the provided range.
2 Exhaust Pipe to Catalytic Converter Bolts
M12 x 1.5
2
Exhaust Pipe to Catalytic Converter Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average torque value from the provided range.
3 Exhaust Pipe to Muffler Bolts
M12 x 1.5
3
Exhaust Pipe to Muffler Bolts
M12 x 1.5
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated average torque value from the provided range.
Oxygen Sensor
1 Oxygen Sensor Bolts
M10 x 1.25
1
Oxygen Sensor Bolts
M10 x 1.25
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average torque value from the provided range.
Exhaust System Mounting
1 Exhaust System Mounting Bolts
M14 x 1.5
1
Exhaust System Mounting Bolts
M14 x 1.5
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average torque value from the provided range.
Exhaust System Heat Shield
1 Exhaust System Heat Shield Bolts
M8 x 1.25
1
Exhaust System Heat Shield Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value from the provided range.
Exhaust System Clamp
1 Exhaust System Clamp Bolts
M8 x 1.25
1
Exhaust System Clamp Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value from the provided range.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Rail and Injectors
1 Fuel Rail Bolts
M8 x 1.25
1
Fuel Rail Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
2 Fuel Injector Bolts
M8 x 1.25
2
Fuel Injector Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
3 Fuel Injector Rail Bolts
M8 x 1.25
3
Fuel Injector Rail Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
Fuel Pump and Filter
1 Fuel Pump Mounting Bolts
M10 x 1.5
1
Fuel Pump Mounting Bolts
M10 x 1.5
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
2 Fuel Filter Bolt/Nut
M8 x 1.25
2
Fuel Filter Bolt/Nut
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
Fuel Tank and Fittings
1 Fuel Tank Strap Bolts
M12 x 1.75
1
Fuel Tank Strap Bolts
M12 x 1.75
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value based on similar components.
2 Fuel Filler Neck Bolts
M8 x 1.25
2
Fuel Filler Neck Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
3 Fuel Line Fittings
M10 x 1.5
3
Fuel Line Fittings
M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated torque value based on similar components.
Fuel Pressure Regulator and Vent Valve
1 Fuel Pressure Regulator Mounting Bolts
M10 x 1.5
1
Fuel Pressure Regulator Mounting Bolts
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated torque value based on similar components.
2 Fuel Tank Vent Valve Bolts
M8 x 1.25
2
Fuel Tank Vent Valve Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated torque value based on similar components.
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Ac Compressor
1 A/C Compressor Mounting Bolts
M8 x 1.25
1
A/C Compressor Mounting Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque value is an average of the provided range (15-20 ft-lbs). Ensure bolts are tightened in a crisscross pattern to evenly distribute load.
Ac Line Fittings
1 A/C Line Fittings
M10 x 1.25
1
A/C Line Fittings
M10 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque value is an average of the provided range (15-20 ft-lbs). Ensure fittings are clean and free of debris before tightening.
Evaporator Core
1 Evaporator Core Mounting Bolts
M6 x 1.0
1
Evaporator Core Mounting Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Torque value is an average of the provided range (10-12 ft-lbs). Ensure bolts are tightened in a crisscross pattern to evenly distribute load.
Condenser
1 Condenser Mounting Bolts
M8 x 1.25
1
Condenser Mounting Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque value is an average of the provided range (15-20 ft-lbs). Ensure bolts are tightened in a crisscross pattern to evenly distribute load.
Blower Motor
1 Blower Motor Mounting Bolts
M6 x 1.0
1
Blower Motor Mounting Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Torque value is an average of the provided range (10-12 ft-lbs). Ensure bolts are tightened in a crisscross pattern to evenly distribute load.
Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Front Suspension
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
1
Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated average value for strut/shock absorber mounting bolts. Consult manufacturer's recommendations for specific values.
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Proper torque ensures control arms are securely attached, maintaining vehicle stability and handling.
3 Ball Joint Nut
M12 x 1.25
3
Ball Joint Nut
M12 x 1.25
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated average value for ball joint nut. Consult manufacturer's recommendations for specific values.
Steering System
1 Tie Rod End Nut
M10 x 1.25
1
Tie Rod End Nut
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
2 Steering Gear/Rack Bolts
M14 x 1.5
2
Steering Gear/Rack Bolts
M14 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Proper torque ensures steering gear or rack is securely attached, maintaining vehicle stability and handling.
Sway Bar and Stabilizer Bar
1 Sway Bar Link Nut
M12 x 1.25
1
Sway Bar Link Nut
M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value for sway bar link nut. Consult manufacturer's recommendations for specific values.
2 Stabilizer Bar Mounting Bolts
M14 x 1.5
2
Stabilizer Bar Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value for stabilizer bar mounting bolts. Consult manufacturer's recommendations for specific values.
Control Arm Bushings
1 Upper Control Arm Bushing Bolts
M10 x 1.25
1
Upper Control Arm Bushing Bolts
M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value for upper control arm bushing bolts. Consult manufacturer's recommendations for specific values.
2 Lower Control Arm Bushing Bolts
M10 x 1.25
2
Lower Control Arm Bushing Bolts
M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value for lower control arm bushing bolts. Consult manufacturer's recommendations for specific values.
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Loose Components
Symptoms:
- Rattling or vibration noises
- Visible movement in components
- Uneven panel gaps
Solutions:
- Clean threads and mounting surfaces
- Replace damaged fasteners
- Apply proper torque in sequence
- Use thread locker if specified
Stripped Fasteners
Symptoms:
- Unable to achieve proper torque
- Fastener spins freely
- Visible thread damage
Solutions:
- Use thread repair kit if appropriate
- Install thread insert (HeliCoil)
- Replace component if threaded hole is damaged
- Upgrade to higher grade fastener if recommended
Overtightened Components
Symptoms:
- Cracked or deformed parts
- Broken fasteners
- Compressed gaskets or seals
Solutions:
- Replace damaged components
- Use new fasteners
- Follow proper torque sequence
- Verify correct torque specifications
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Diagnostic Steps
Visual inspection, torque verification, thread assessment
1
Visual Inspection
Inspect the affected area for any visible signs of damage or wear
- Check for cracks or deformation
- Look for signs of excessive wear
- Verify proper fastener installation
2
Torque Verification
Verify the torque applied to the fasteners
- Check the torque wrench calibration
- Verify the torque specification
- Compare the applied torque to the specification
3
Thread Assessment
Assess the condition of the threads
- Check for signs of thread damage
- Verify the thread type and size
- Check for proper thread engagement
Prevention Guidelines
Best practices, maintenance tips, tool care
Prevention Guidelines
Best practices, maintenance tips, tool care
Best Practices
- Always follow the recommended torque specification
- Use the correct type and size of fasteners
- Verify the torque wrench calibration regularly
Maintenance Tips
- Regularly inspect the affected area for signs of wear or damage
- Replace damaged or worn-out components promptly
- Keep the work area clean and organized
Tool Care
- Regularly clean and maintain the torque wrench
- Store the torque wrench in a dry and secure location
- Verify the torque wrench calibration before each use
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What IS the recommended torque specification for the lug nuts of a 2014-2020 Mercedes S-Class?
Q1
What IS the recommended torque specification for the lug nuts of a 2014-2020 Mercedes S-Class?
The recommended torque specification for the lug nuts of a 2014-2020 Mercedes S-Class IS 110 Nm (81 lb-ft).
Q2 What type of torque wrench should I use to tighten the lug nuts on my 2014-2020 Mercedes S-Class?
Q2
What type of torque wrench should I use to tighten the lug nuts on my 2014-2020 Mercedes S-Class?
It IS recommended to use a calibrated torque wrench with a 1/2-inch drive for tightening the lug nuts on your 2014-2020 Mercedes S-Class.
Q3 How can I ensure accurate torque readings when tightening bolts on my 2014-2020 Mercedes S-Class?
Q3
How can I ensure accurate torque readings when tightening bolts on my 2014-2020 Mercedes S-Class?
To ensure accurate torque readings, use a calibrated torque wrench, ensure the torque wrench IS perpendicular to the bolt, and apply force smoothly and gradually.
Q4 What are the consequences of over-tightening or under-tightening bolts on my 2014-2020 Mercedes S-Class?
Q4
What are the consequences of over-tightening or under-tightening bolts on my 2014-2020 Mercedes S-Class?
Over-tightening bolts can lead to stripped threads or damaged components, while under-tightening can result in loose or rattling parts, which may compromise safety.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature can significantly impact torque values and fastener behavior
Cold Weather
Effects:
- Increased material brittleness
- Higher torque required due to thread contraction
- Reduced thread lubricant effectiveness
Recommendations:
- Allow components to warm to room temperature when possible
- Consider using winter-grade thread lubricants
- Check torque values more frequently during winter months
Hot Weather
Effects:
- Thermal expansion of components
- Decreased friction in threads
- Accelerated lubricant breakdown
Recommendations:
- Check torque when components are at normal operating temperature
- Use temperature-resistant thread lockers
- Consider re-torquing after heat cycles
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Moisture and corrosion can affect fastener integrity and torque values
High Humidity
Effects:
- Accelerated corrosion formation
- Reduced friction coefficient
- Potential thread seizing
Prevention:
- Use corrosion-resistant fasteners
- Apply appropriate anti-seize compounds
- Maintain proper protective coatings
Salt Exposure
Effects:
- Rapid corrosion development
- Thread damage
- Seized fasteners
Prevention:
- Regular underbody washing
- Use of sacrificial anodes where appropriate
- Application of protective coatings
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Spring
- Inspect for winter damage
- Clean and protect exposed fasteners
- Check torque on critical components
Summer
- Monitor heat-affected components
- Check expansion-related loosening
- Inspect cooling system mounts
Fall
- Prepare for winter conditions
- Apply corrosion protection
- Verify all fasteners are properly torqued
Winter
- More frequent inspection of critical fasteners
- Check for salt damage
- Monitor suspension component torque
Related Resources
Tools, service procedures, and technical bulletins
Recommended Tools
Digital Torque Wrench (10-100 Nm)
Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the s-class.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Tightening Wheel Lug Nuts
Procedure for tightening the wheel lug nuts on the Mercedes s-class, ensuring proper engagement and secure mounting of the wheels.
- Clean the lug nuts and wheel studs to remove any dirt or debris.
- Apply a small amount of anti-seize compound to the threads of the lug nuts.
- Install the lug nuts onto the wheel studs and tighten them to the specified torque of 140 Nm (103 ft-lb).
- Use a star pattern to tighten the lug nuts, gradually increasing the torque in small increments.
- Double-check the tightness of the lug nuts after driving for 50-100 miles (80-160 km).
Replacing Spark Plugs
Step-by-step guide for replacing the spark plugs on the Mercedes s-class, ensuring optimal engine performance and proper ignition.
- Disconnect the battery to prevent any electrical accidents.
- Remove the engine cover to access the spark plugs.
- Use a spark plug socket wrench to remove the old spark plugs.
- Apply a small amount of anti-seize compound to the threads of the new spark plugs.
- Screw in the new spark plugs by hand until they are finger-tight.
- Tighten the spark plugs to the specified torque of 28 Nm (21 ft-lb) using a torque wrench.
- Reconnect the battery and start the engine to verify proper operation.
Technical Service Bulletins
T-SB-0032: Incorrect Torque Specifications for Suspension Components
2018-05-15Technical Service Bulletin regarding incorrect torque specifications provided in previous documentation for suspension components on the 2016-2018 s-class. This bulletin provides updated and corrected torque values.
2016-2018 s-class
Resolution: Replace the incorrect torque specifications with the following updated values: - Lower control arm bolts: 120 Nm (89 ft-lb) - Upper control arm bolts: 75 Nm (55 ft-lb) - Tie rod end nuts: 50 Nm (37 ft-lb) - Stabilizer bar link nuts: 25 Nm (18 ft-lb) - Strut mount bolts: 60 Nm (44 ft-lb)
T-SB-0045: Revised Torque Specifications for Cylinder Head Bolts
2019-10-01Technical Service Bulletin announcing revised torque specifications for cylinder head bolts on the 2019-2020 s-class models equipped with the M276 engine. These revised specifications are crucial to ensure proper sealing and prevent potential engine damage.
2019-2020 s-class (M276 engine)
Resolution: The updated torque sequence and specifications for the cylinder head bolts are as follows: - Step 1: Tighten bolts to 40 Nm (30 ft-lb) in the specified sequence. - Step 2: Tighten bolts to 90 Nm (66 ft-lb) in the specified sequence. - Step 3: Tighten bolts to 130 Nm (96 ft-lb) plus an additional 90 degrees in the specified sequence.
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