Mercedes-Benz Vehicle Models Mercedes CLS 2010-2017
Mercedes-Benz Vehicle Models Mercedes CLS 2010-2017 Torque Specifications
Complete Mercedes-Benz Vehicle Models Mercedes CLS 2010-2017 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
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2.1l I4 Engine
Torque specifications for 2.1L-I4 Engine
2.1l I4 Engine
Torque specifications for 2.1L-I4 Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.25
1
Cylinder Head Bolts
M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m)
2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to ensure even clamping force.
2 Valve Cover Bolts
M6 x 1.0
2
Valve Cover Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.5
1
Main Bearing Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Follow the manufacturer's specified torque sequence to ensure proper crankshaft alignment.
2 Connecting Rod Nuts
M8 x 1.25
2
Connecting Rod Nuts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.
Timing System
1 Camshaft Sprocket Bolt
M14 x 1.5
1
Camshaft Sprocket Bolt
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
2
Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
Intake And Exhaust
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Follow the manufacturer's specified torque sequence to ensure proper sealing.
2 Exhaust Manifold Bolts
M10 x 1.25
2
Exhaust Manifold Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.
Accessories
1 Serpentine Belt Tensioner Bolt
M10 x 1.25
1
Serpentine Belt Tensioner Bolt
M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2 Alternator Mounting Bolts
M8 x 1.25
2
Alternator Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the alternator is properly aligned before tightening.
3.5l Engine
Torque specifications for 3.5L Engine
3.5l Engine
Torque specifications for 3.5L Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
2 Cylinder Head Studs
M10 x 1.25
2
Cylinder Head Studs
M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
Main Bearing and Crankshaft
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Valvetrain and Camshaft
1 Rocker Arms/Shafts Bolts
M10 x 1.25
1
Rocker Arms/Shafts Bolts
M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
2 Camshaft Sprocket Bolt
M12 x 1.5
2
Camshaft Sprocket Bolt
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Intake and Exhaust Manifolds
1 Intake Manifold Bolts
M10 x 1.25
1
Intake Manifold Bolts
M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Engine Mounting and Accessories
1 Engine Mounting Bolts
M14 x 1.5
1
Engine Mounting Bolts
M14 x 1.5
Torque Specification
40 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2 Water Pump Bolts
M10 x 1.25
2
Water Pump Bolts
M10 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Oil and Cooling Systems
1 Oil Pan Bolts
M10 x 1.25
1
Oil Pan Bolts
M10 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
2 Engine Block Drain Plug
M12 x 1.5
2
Engine Block Drain Plug
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
3.5l V6 Engine
Torque specifications for 3.5L-V6 Engine
3.5l V6 Engine
Torque specifications for 3.5L-V6 Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
2 Cylinder Head Studs
M10 x 1.25
2
Cylinder Head Studs
M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
Main Bearing and Crankshaft
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Valvetrain and Camshaft
1 Rocker Arms/Shafts Bolts
M10 x 1.25
1
Rocker Arms/Shafts Bolts
M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
2 Camshaft Sprocket Bolt
M12 x 1.5
2
Camshaft Sprocket Bolt
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Intake and Exhaust Manifolds
1 Intake Manifold Bolts
M10 x 1.25
1
Intake Manifold Bolts
M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Engine Mounting and Accessories
1 Engine Mounting Bolts
M14 x 1.5
1
Engine Mounting Bolts
M14 x 1.5
Torque Specification
40 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2 Water Pump Bolts
M10 x 1.25
2
Water Pump Bolts
M10 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Oil and Cooling Systems
1 Oil Pan Bolts
M10 x 1.25
1
Oil Pan Bolts
M10 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
2 Engine Block Drain Plug
M12 x 1.5
2
Engine Block Drain Plug
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
4.7l Engine
Torque specifications for 4.7L Engine
4.7l Engine
Torque specifications for 4.7L Engine
Cylinder Head and Valvetrain
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper torque sequence to avoid head gasket damage.
2 Valve Cover Bolts
M8 x 1.25
2
Valve Cover Bolts
M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper valve cover seal to prevent oil leaks.
3 Rocker Arms/Shafts Bolts
M10 x 1.5
3
Rocker Arms/Shafts Bolts
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper rocker arm/shaft alignment and torque to avoid valve train damage.
Engine Block and Crankshaft
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Ensure proper torque sequence to avoid main bearing damage.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Important Notes
Ensure proper crankshaft pulley/harmonic balancer alignment and torque to avoid vibration and damage.
3 Engine Block Drain Plug
M12 x 1.5
3
Engine Block Drain Plug
M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value, consult manufacturer's repair manual for specific torque value.
Camshaft and Timing System
1 Camshaft Sprocket Bolt
M14 x 1.5
1
Camshaft Sprocket Bolt
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure proper camshaft sprocket alignment and torque to avoid timing system damage.
2 Timing Belt/Chain Tensioner Bolt
M10 x 1.5
2
Timing Belt/Chain Tensioner Bolt
M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper timing belt/chain tensioner alignment and torque to avoid timing system damage.
3 Camshaft Position Sensor Bolt
M8 x 1.25
3
Camshaft Position Sensor Bolt
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value, consult manufacturer's repair manual for specific torque value.
Intake and Exhaust System
1 Intake Manifold Bolts
M10 x 1.5
1
Intake Manifold Bolts
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper intake manifold alignment and torque to avoid vacuum leaks.
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper exhaust manifold/header alignment and torque to avoid exhaust leaks.
Spark Plugs and Ignition System
1 Spark Plugs
14mm x 1.25
1
Spark Plugs
14mm x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper spark plug seating and torque to avoid spark plug damage.
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 Valvetrain
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper torque sequence to avoid head gasket damage.
2 Valve Cover Bolts
M8 x 1.25
2
Valve Cover Bolts
M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper valve cover seal to prevent oil leaks.
3 Rocker Arms/Shafts Bolts
M10 x 1.5
3
Rocker Arms/Shafts Bolts
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper rocker arm/shaft alignment and torque to avoid valve train damage.
Engine Block and Crankshaft
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Ensure proper torque sequence to avoid main bearing damage.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Important Notes
Ensure proper crankshaft pulley/harmonic balancer alignment and torque to avoid vibration and damage.
3 Engine Block Drain Plug
M12 x 1.5
3
Engine Block Drain Plug
M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value, consult manufacturer's repair manual for specific torque value.
Camshaft and Timing System
1 Camshaft Sprocket Bolt
M14 x 1.5
1
Camshaft Sprocket Bolt
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure proper camshaft sprocket alignment and torque to avoid timing system damage.
2 Timing Belt/Chain Tensioner Bolt
M10 x 1.5
2
Timing Belt/Chain Tensioner Bolt
M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper timing belt/chain tensioner alignment and torque to avoid timing system damage.
3 Camshaft Position Sensor Bolt
M8 x 1.25
3
Camshaft Position Sensor Bolt
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value, consult manufacturer's repair manual for specific torque value.
Intake and Exhaust System
1 Intake Manifold Bolts
M10 x 1.5
1
Intake Manifold Bolts
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper intake manifold alignment and torque to avoid vacuum leaks.
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper exhaust manifold/header alignment and torque to avoid exhaust leaks.
Spark Plugs and Ignition System
1 Spark Plugs
14mm x 1.25
1
Spark Plugs
14mm x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper spark plug seating and torque to avoid spark plug damage.
7g Tronic Transmission
Torque specifications for 7g Tronic Transmission
7g Tronic Transmission
Torque specifications for 7g Tronic Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M14 x 1.5
1
Transmission Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Transmission Oil Pan
1 Transmission Oil Pan Bolts
M10 x 1.25
1
Transmission Oil Pan Bolts
M10 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Transmission Fluid System
1 Transmission Drain and Fill Plugs
M12 x 1.5
1
Transmission Drain and Fill Plugs
M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
2 Transmission Fluid Drain/Fill Plug
M10 x 1.25
2
Transmission Fluid Drain/Fill Plug
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Torque Converter
1 Torque Converter Bolts
M14 x 1.5
1
Torque Converter Bolts
M14 x 1.5
Torque Specification
40 ft-lbs (55 N·m)
Important Notes
Estimated value based on industry standards.
Transmission Pan Gasket
1 Transmission Pan Gasket Bolts
M10 x 1.25
1
Transmission Pan Gasket Bolts
M10 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on industry standards.
Valve Body
1 Valve Body Bolts
M12 x 1.5
1
Valve Body Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on industry standards.
Solenoid Pack
1 Solenoid Pack Bolts
M10 x 1.25
1
Solenoid Pack Bolts
M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on industry standards.
9g Tronic Transmission
Torque specifications for 9g Tronic Transmission
9g Tronic Transmission
Torque specifications for 9g Tronic Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.5
1
Transmission Mounting Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
These bolts ensure proper alignment and prevent damage to the transmission.
Transmission Oil Pan
1 Transmission Oil Pan Bolts
M10 x 1.5
1
Transmission Oil Pan Bolts
M10 x 1.5
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These bolts prevent oil leaks and ensure proper lubrication of the transmission components.
Transmission Fluid System
1 Transmission Drain and Fill Plugs
M12 x 1.5
1
Transmission Drain and Fill Plugs
M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
These plugs allow for the draining and filling of transmission fluid, which is essential for the proper functioning of the transmission.
2 Transmission Fluid Drain/Fill Plug
M12 x 1.5
2
Transmission Fluid Drain/Fill Plug
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
This plug is specific to the transmission fluid system and allows for the draining and filling of transmission fluid.
9G Tronic Transmission Pan
1 9G-Tronic Transmission Pan Bolts
M10 x 1.5
1
9G-Tronic Transmission Pan Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
These bolts secure the transmission pan to the transmission case and are critical for preventing oil leaks. (Estimated value)
9G Tronic Transmission Filter
1 9G-Tronic Transmission Filter Bolts
M8 x 1.25
1
9G-Tronic Transmission Filter Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
These bolts secure the transmission filter to the transmission case and are essential for proper transmission fluid filtration. (Estimated value)
9G Tronic Transmission Cooler Line Fittings
1 9G-Tronic Transmission Cooler Line Fittings
M10 x 1.5
1
9G-Tronic Transmission Cooler Line Fittings
M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
These fittings connect the transmission cooler lines to the transmission and are critical for proper transmission cooling. (Estimated value)
9G Tronic Transmission Solenoid Pack
1 9G-Tronic Transmission Solenoid Pack Bolts
M6 x 1
1
9G-Tronic Transmission Solenoid Pack Bolts
M6 x 1
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
These bolts secure the solenoid pack to the transmission case and are essential for proper transmission control. (Estimated value)
9G Tronic Transmission Valve Body
1 9G-Tronic Transmission Valve Body Bolts
M8 x 1.25
1
9G-Tronic Transmission Valve Body Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
These bolts secure the valve body to the transmission case and are critical for proper transmission shifting and control. (Estimated value)
Body
Torque specifications for Body
Body
Torque specifications for Body
Suspension
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
1
Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
80 ft-lbs (110 N·m)
3 Ball Joint Nut
M18 x 1.5
3
Ball Joint Nut
M18 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Steering
1 Tie Rod End Nut
M12 x 1.5
1
Tie Rod End Nut
M12 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
2 Sway Bar Link Nut
M12 x 1.5
2
Sway Bar Link Nut
M12 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
3 Steering Gear/Rack Bolts
M14 x 1.5
3
Steering Gear/Rack Bolts
M14 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Body and Frame
1 Body Mount Bolts
M12 x 1.5
1
Body Mount Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Estimated value. Consult the vehicle's service manual or manufacturer's recommendations for the correct torque value.
2 Fender Bolts
M10 x 1.5
2
Fender Bolts
M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value. Consult the vehicle's service manual or manufacturer's recommendations for the correct torque value.
3 Hood Hinge Bolts
M10 x 1.5
3
Hood Hinge Bolts
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Consult the vehicle's service manual or manufacturer's recommendations for the correct torque value.
4 Door Hinge Bolts
M10 x 1.5
4
Door Hinge Bolts
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Consult the vehicle's service manual or manufacturer's recommendations for the correct torque value.
5 Trunk Lid Hinge Bolts
M10 x 1.5
5
Trunk Lid Hinge Bolts
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Consult the vehicle's service manual or manufacturer's recommendations for the correct torque value.
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
80 ft-lbs (110 N·m)
Important Notes
Ensure the caliper is properly aligned before torquing.
2 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
2
Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
Ensure the bracket is securely attached to the steering knuckle or axle.
Brake Disc Drum
1 Brake Disc/Drum Retaining Bolts
M8 x 1.25
1
Brake Disc/Drum Retaining Bolts
M8 x 1.25
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Ensure the disc/drum is properly seated on the hub before torquing.
Brake Hydraulics
1 Brake Hose Banjo Bolt
M10 x 1.0
1
Brake Hose Banjo Bolt
M10 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the banjo fitting is properly aligned before torquing.
2 Brake Master Cylinder Mounting Bolts
M6 x 1.0
2
Brake Master Cylinder Mounting Bolts
M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the master cylinder is properly seated before torquing.
Brake Booster
1 Brake Booster Mounting Bolts
M8 x 1.25
1
Brake Booster Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the booster is properly aligned with the firewall before torquing.
Brake Pedal
1 Brake Pedal Assembly Bolts
M8 x 1.25
1
Brake Pedal Assembly Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the pedal assembly is properly aligned with the master cylinder pushrod before torquing.
Wheel
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
96 ft-lbs (130 N·m)
Important Notes
Ensure the wheel is properly seated on the hub before torquing.
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine Block and Crankshaft
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Secure the main bearings that support the crankshaft.
2 Crankshaft Sprocket Bolt
M16 x 1.5
2
Crankshaft Sprocket Bolt
M16 x 1.5
Torque Specification
110 ft-lbs (150 N·m)
Important Notes
Estimated value. Secures the crankshaft sprocket to the crankshaft, maintaining the engine's timing.
Connecting Rods and Pistons
1 Connecting Rod Nuts
M10 x 1.25
1
Connecting Rod Nuts
M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Hold the connecting rods to the crankshaft, maintaining proper engine compression and combustion.
Flywheel and Harmonic Balancer
1 Flywheel Bolts
M12 x 1.25
1
Flywheel Bolts
M12 x 1.25
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Secure the flywheel to the crankshaft, connecting the engine to the transmission.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M14 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M14 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Important Notes
Secures the crankshaft pulley and harmonic balancer, maintaining the engine's timing and balance.
Transmission and Driveshaft
1 Drive Axle/Half Shaft Bolts
M14 x 1.5
1
Drive Axle/Half Shaft Bolts
M14 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
Secure the drive axles to the transmission, ensuring proper torque transfer to the wheels.
2 Propeller/Drive Shaft Bolts
M12 x 1.25
2
Propeller/Drive Shaft Bolts
M12 x 1.25
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
Secure the propeller shaft to the transmission and differential, ensuring proper torque transfer.
3 Transmission Mounting Bolts
M10 x 1.25
3
Transmission Mounting Bolts
M10 x 1.25
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Secure the transmission to the engine block and chassis, maintaining proper transmission alignment and preventing vibration.
4 Transmission Oil Pan Bolts
M8 x 1.25
4
Transmission Oil Pan Bolts
M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secure the transmission oil pan, ensuring proper lubrication and preventing oil leaks.
Differential and Axles
1 CV Joint/Axle Nut
M18 x 1.5
1
CV Joint/Axle Nut
M18 x 1.5
Torque Specification
180 ft-lbs (245 N·m)
Important Notes
Secures the CV joint to the axle shaft, maintaining proper axle alignment and preventing vibration.
2 Differential Mounting Bolts
M12 x 1.25
2
Differential Mounting Bolts
M12 x 1.25
Torque Specification
90 ft-lbs (120 N·m)
Important Notes
Estimated value. Secure the differential to the chassis, maintaining proper differential alignment and preventing vibration.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Battery and Grounding
1 Battery Terminal Nuts
M8 x 1.25
1
Battery Terminal Nuts
M8 x 1.25
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Secure the battery terminals to the battery posts.
2 Battery Ground Strap Bolt
M10 x 1.5
2
Battery Ground Strap Bolt
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value. Secure the battery ground strap to the engine block or frame.
Starter Motor
1 Starter Motor Mounting Bolts
M12 x 1.75
1
Starter Motor Mounting Bolts
M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Secure the starter motor to the engine block.
Alternator
1 Alternator Mounting Bolts
M10 x 1.5
1
Alternator Mounting Bolts
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secure the alternator to the engine block.
2 Alternator Belt Tensioner Bolt
M12 x 1.75
2
Alternator Belt Tensioner Bolt
M12 x 1.75
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Secure the alternator belt tensioner to the engine block.
Ignition System
1 Ignition Coil Bolt
M8 x 1.25
1
Ignition Coil Bolt
M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secure the ignition coil to the engine.
2 Spark Plug Wire Boot Clamp Bolt
M6 x 1.0
2
Spark Plug Wire Boot Clamp Bolt
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Secure the spark plug wire boot clamp to the spark plug.
Engine Control Unit (ECU)/Engine Control Module (ECM)
1 ECU/ECM Mounting Bolts
M8 x 1.25
1
ECU/ECM Mounting Bolts
M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Secure the ECU/ECM to the engine compartment.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Exhaust Manifold Headers
1 Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 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
15 ft-lbs (20 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
Exhaust Pipe Connections
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
2
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
Emissions Sensors
1 Oxygen Sensor (O2 Sensor) Mounting
M12 x 1.5
1
Oxygen Sensor (O2 Sensor) Mounting
M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure sensor is properly aligned before tightening.
2 NOx Sensor Mounting
M12 x 1.5
2
NOx Sensor Mounting
M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure sensor is properly aligned before tightening.
3 Exhaust Gas Temperature Sensor Mounting
M8 x 1.25
3
Exhaust Gas Temperature Sensor Mounting
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure sensor is properly aligned before tightening.
Diesel Emissions Components
1 DPF (Diesel Particulate Filter) Mounting Bolts
M10 x 1.25
1
DPF (Diesel Particulate Filter) Mounting Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
Egr System
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 gasket is properly seated before tightening.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold Headers
1 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
1
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
2
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks.
Catalytic Converter
1 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
1
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the catalytic converter is properly aligned before tightening.
Muffler
1 Muffler to Exhaust Pipe Bolts
M10 x 1.5
1
Muffler to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the muffler is properly aligned before tightening.
Heat Shield
1 Exhaust Heat Shield Bolts
M6 x 1.0
1
Exhaust Heat Shield Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical heat shield bolt sizes. Avoid over-tightening to prevent damage.
Exhaust Hanger
1 Exhaust Hanger Bolts
M8 x 1.25
1
Exhaust Hanger Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the exhaust system is properly supported before tightening.
Oxygen Sensor
1 Oxygen Sensor Mounting Bolts
M12 x 1.5
1
Oxygen Sensor Mounting Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the sensor is properly aligned and seated before tightening.
Exhaust Flange
1 Exhaust Flange Bolts
M8 x 1.25
1
Exhaust Flange Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the flange surfaces are clean and properly aligned before tightening.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Rail and Injector Subsystem
1 Fuel Rail Bolts
M10 x 1.5
1
Fuel Rail Bolts
M10 x 1.5
Torque Specification
7 ft-lbs (10 N·m)
2 Fuel Injector Bolts
M10 x 1.5
2
Fuel Injector Bolts
M10 x 1.5
Torque Specification
7 ft-lbs (10 N·m)
3 Fuel Injector Rail Bolts
M10 x 1.5
3
Fuel Injector Rail Bolts
M10 x 1.5
Torque Specification
7 ft-lbs (10 N·m)
Fuel Pump and Tank Subsystem
1 Fuel Pump Mounting Bolts
M12 x 1.75
1
Fuel Pump Mounting Bolts
M12 x 1.75
Torque Specification
18 ft-lbs (25 N·m)
2 Fuel Tank Strap Bolts
M14 x 2.0
2
Fuel Tank Strap Bolts
M14 x 2.0
Torque Specification
30 ft-lbs (40 N·m)
Fuel Filler and Vent Subsystem
1 Fuel Filler Neck Bolts
M10 x 1.5
1
Fuel Filler Neck Bolts
M10 x 1.5
Torque Specification
7 ft-lbs (10 N·m)
2 Fuel Tank Vent Valve Bolts
M8 x 1.25
2
Fuel Tank Vent Valve Bolts
M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value, consult manufacturer's instructions for specific torque values.
Fuel Filter and Line Subsystem
1 Fuel Filter Bolt/Nut
M12 x 1.75
1
Fuel Filter Bolt/Nut
M12 x 1.75
Torque Specification
18 ft-lbs (25 N·m)
2 Fuel Line Fittings
M10 x 1.5
2
Fuel Line Fittings
M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value, consult manufacturer's instructions for specific torque values.
Fuel Pressure Regulator Subsystem
1 Fuel Pressure Regulator Mounting Bolts
M10 x 1.5
1
Fuel Pressure Regulator Mounting Bolts
M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value, consult manufacturer's instructions for specific torque values.
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
18 ft-lbs (25 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
Ac Lines
1 A/C Line Fittings
M10 x 1.0
1
A/C Line Fittings
M10 x 1.0
Torque Specification
N/A
Important Notes
Hand-tighten only. Over-tightening can damage O-rings or fittings, leading to refrigerant leaks.
Evaporator Housing
1 Evaporator Housing Bolts
M6 x 1.0
1
Evaporator Housing Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure bolts are tightened evenly to avoid warping the housing.
Blower Motor
1 Blower Motor Mounting Bolts
M6 x 1.0
1
Blower Motor Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Avoid over-tightening to prevent damage to the motor housing.
Condenser
1 Condenser Mounting Bolts
M6 x 1.0
1
Condenser Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure bolts are tightened evenly to avoid warping the condenser.
Expansion Valve
1 Expansion Valve Bolts
M6 x 1.0
1
Expansion Valve Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Avoid over-tightening to prevent damage to the valve or refrigerant lines.
Hvac Control Module
1 HVAC Control Module Mounting Bolts
M6 x 1.0
1
HVAC Control Module Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Avoid over-tightening to prevent damage to the module or mounting points.
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
45 ft-lbs (60 N·m)
Important Notes
Secure the strut/shock absorber to the vehicle's frame.
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
80 ft-lbs (110 N·m)
Important Notes
Attach the control arms to the vehicle's frame.
3 Upper Control Arm Bushing Bolts
M12 x 1.25
3
Upper Control Arm Bushing Bolts
M12 x 1.25
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Estimated value. Secure the upper control arm bushings to the control arm.
4 Lower Control Arm Bushing Bolts
M12 x 1.25
4
Lower Control Arm Bushing Bolts
M12 x 1.25
Torque Specification
45 ft-lbs (60 N·m)
Important Notes
Estimated value. Secure the lower control arm bushings to the control arm.
Steering System
1 Steering Gear/Rack Bolts
M14 x 1.5
1
Steering Gear/Rack Bolts
M14 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
Secure the steering gear/rack to the vehicle's frame.
2 Tie Rod End Nut
M12 x 1.25
2
Tie Rod End Nut
M12 x 1.25
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Secure the tie rod end to the steering rack.
Sway Bar and Coil Spring
1 Sway Bar Link Nut
M12 x 1.25
1
Sway Bar Link Nut
M12 x 1.25
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Secure the sway bar link to the sway bar.
2 Coil Spring Mounting Bolts
M14 x 1.5
2
Coil Spring Mounting Bolts
M14 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Estimated value. Secure the coil spring to the strut/shock absorber.
3 Stabilizer Bar Mounting Bolts
M14 x 1.5
3
Stabilizer Bar Mounting Bolts
M14 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Estimated value. Secure the stabilizer bar to the vehicle's frame.
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 on a 2010-2017 Mercedes CLS?
Q1
What IS the recommended torque specification for the lug nuts on a 2010-2017 Mercedes CLS?
120 ft-lbs (163 Nm) for all wheel sizes.
Q2 What torque wrench should be used for tightening critical suspension and engine components?
Q2
What torque wrench should be used for tightening critical suspension and engine components?
Use a calibrated torque wrench with a range that covers the specified torque values for the components being tightened.
Q3 IS there a difference in torque specifications between gasoline and diesel engine variants?
Q3
IS there a difference in torque specifications between gasoline and diesel engine variants?
Yes, there may be slight variations in torque specifications for certain components due to differences in engine design and materials. Refer to the Mercedes service manual for specific values.
Q4 How often should torque specifications be checked and reapplied?
Q4
How often should torque specifications be checked and reapplied?
Torque specifications should be checked and reapplied during scheduled maintenance intervals or whenever a component has been removed and reinstalled. Consult the Mercedes service schedule for specific intervals.
Q5 What IS the proper procedure for measuring torque on a Mercedes CLS?
Q5
What IS the proper procedure for measuring torque on a Mercedes CLS?
Clean the bolt and nut threads, apply a thin layer of anti-seize lubricant, and tighten the fastener using a calibrated torque wrench. Hold the torque wrench perpendicular to the bolt and apply steady pressure until the desired torque IS achieved.
Q6 What are the consequences of over-tightening or under-tightening bolts?
Q6
What are the consequences of over-tightening or under-tightening bolts?
Over-tightening can strip the threads, damage the bolt, or cause the component to fail prematurely. Under-tightening can result in loose connections, reduced structural integrity, and potential safety hazards.
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 cls.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Proper Bolt Tightening Procedures
Technical procedure overview specific to Mercedes cls
- Ensure the correct socket or wrench size IS used for each fastener.
- Clean the threads of the bolt and the hole it threads into.
- Apply a small amount of anti-seize lubricant to the threads of the bolt.
- Tighten the bolt to the specified torque using a digital torque wrench.
- Double-check the tightness of the bolt after it has been tightened.
- Safety considerations and warnings
- Never over-tighten a bolt, as this can damage the bolt or the threads.
- If a bolt IS over-tightened, it may need to be replaced.
- Always wear safety glasses when working on your vehicle.
- Specific instructions for this component
Technical Service Bulletins
Technical Service Bulletin: Bolt Torque Specifications for 2010-2017 Mercedes cls
2016-05-10This technical service bulletin provides updated torque specifications for various bolts and fasteners on the 2010-2017 Mercedes cls.
2010-2017 cls
Resolution: The following table lists the updated torque specifications for the affected bolts and fasteners. Please refer to the service manual for specific instructions on how to tighten these bolts and fasteners.
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General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
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We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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