Mercedes-Benz Vehicle Models Mercedes C-Class 2007-2014 Torque Specifications
Complete Mercedes-Benz Vehicle Models Mercedes C-Class 2007-2014 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.
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
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.
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.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
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.
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.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
Search Specifications
Search by component name, bolt size, or description
Torque Calculator
Convert between different torque units
1.8l I4 Engine
Torque specifications for 1.8L-I4 Engine
1.8l I4 Engine
Torque specifications for 1.8L-I4 Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
Cylinder Head Bolts
M10 x 1.5 2 Camshaft Bearing Cap Bolts
M8 x 1.25
Camshaft Bearing Cap Bolts
M8 x 1.25Crankshaft And Bearings
1 Main Bearing Bolts
M10 x 1.5
Main Bearing Bolts
M10 x 1.5 2 Flywheel Bolts
M12 x 1.5
Flywheel Bolts
M12 x 1.5Valvetrain
1 Rocker Arms/Shafts Bolts
M8 x 1.25
Rocker Arms/Shafts Bolts
M8 x 1.25 2 Valve Cover Bolts
M6 x 1.0
Valve Cover Bolts
M6 x 1.0Lubrication System
1 Oil Pan Bolts
M6 x 1.0
Oil Pan Bolts
M6 x 1.0 2 Oil Filter Housing Bolt
M8 x 1.25
Oil Filter Housing Bolt
M8 x 1.25Cooling System
1 Water Pump Bolts
M6 x 1.0
Water Pump Bolts
M6 x 1.0 2 Thermostat Housing Bolts
M6 x 1.0
Thermostat Housing Bolts
M6 x 1.0 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
M12 x 1.5
Cylinder Head Bolts
M12 x 1.5Main Bearing
1 Main Bearing Bolts
M14 x 1.5
Main Bearing Bolts
M14 x 1.5Connecting Rod
1 Connecting Rod Nuts
M10 x 1.5
Connecting Rod Nuts
M10 x 1.5Flywheel
1 Flywheel Bolts
M16 x 1.5
Flywheel Bolts
M16 x 1.5Oil Pan
1 Oil Pan Bolts
M8 x 1.25
Oil Pan Bolts
M8 x 1.25Valve Cover
1 Valve Cover Bolts
M6 x 1.0
Valve Cover Bolts
M6 x 1.0Timing Belt Chain
1 Timing Belt/Chain Tensioner Bolt
M12 x 1.5
Timing Belt/Chain Tensioner Bolt
M12 x 1.5Camshaft Sprocket
1 Camshaft Sprocket Bolt
M14 x 1.5
Camshaft Sprocket Bolt
M14 x 1.5Crankshaft Pulley
1 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5Throttle Body
1 Throttle Body Bolts
M6 x 1.0
Throttle Body Bolts
M6 x 1.0Intake Manifold
1 Intake Manifold Bolts
M10 x 1.5
Intake Manifold Bolts
M10 x 1.5Exhaust Manifold
1 Exhaust Manifold/Headers Bolts
M12 x 1.5
Exhaust Manifold/Headers Bolts
M12 x 1.5Spark Plugs
1 Spark Plug Bolts
M14 x 1.25
Spark Plug Bolts
M14 x 1.25Rocker Arms
1 Rocker Arms/Shafts Bolts
M10 x 1.5
Rocker Arms/Shafts Bolts
M10 x 1.5Fuel Injector
1 Fuel Injector Bolts
M6 x 1.0
Fuel Injector Bolts
M6 x 1.0Fuel Rail
1 Fuel Rail Bolts
M6 x 1.0
Fuel Rail Bolts
M6 x 1.0Oil Filter Housing
1 Oil Filter Housing Bolt
M12 x 1.5
Oil Filter Housing Bolt
M12 x 1.5Oil Drain Plug
1 Oil Drain Plug Bolt
M14 x 1.5
Oil Drain Plug Bolt
M14 x 1.5Engine Mounting
1 Engine Mounting Bolts
M14 x 1.5
Engine Mounting Bolts
M14 x 1.5Crankshaft Position Sensor
1 Crankshaft Position Sensor Bolt
M10 x 1.5
Crankshaft Position Sensor Bolt
M10 x 1.5Camshaft Position Sensor
1 Camshaft Position Sensor Bolt
M10 x 1.5
Camshaft Position Sensor Bolt
M10 x 1.5Engine Block To Transmission
1 Engine Block to Transmission Bellhousing Bolts
M14 x 1.5
Engine Block to Transmission Bellhousing Bolts
M14 x 1.5 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
Cylinder Head Bolts
M10 x 1.5 2 Valve Cover Bolts
M6 x 1.0
Valve Cover Bolts
M6 x 1.0Crankshaft And Bearings
1 Main Bearing Bolts
M10 x 1.5
Main Bearing Bolts
M10 x 1.5 2 Connecting Rod Nuts
M8 x 1.25
Connecting Rod Nuts
M8 x 1.25Timing System
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Timing Belt/Chain Tensioner Bolt
M8 x 1.25 2 Camshaft Sprocket Bolt
M10 x 1.5
Camshaft Sprocket Bolt
M10 x 1.5Intake And Exhaust
1 Intake Manifold Bolts
M6 x 1.0
Intake Manifold Bolts
M6 x 1.0 2 Exhaust Manifold Bolts
M8 x 1.25
Exhaust Manifold Bolts
M8 x 1.25Fuel System
1 Fuel Rail Bolts
M6 x 1.0
Fuel Rail Bolts
M6 x 1.0 2 Fuel Injector Bolts
M6 x 1.0
Fuel Injector Bolts
M6 x 1.0 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
Cylinder Head Bolts
M10 x 1.5 2 Valve Cover Bolts
M6 x 1.0
Valve Cover Bolts
M6 x 1.0Crankshaft And Bearings
1 Main Bearing Bolts
M10 x 1.5
Main Bearing Bolts
M10 x 1.5 2 Connecting Rod Nuts
M8 x 1.25
Connecting Rod Nuts
M8 x 1.25Timing System
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Timing Belt/Chain Tensioner Bolt
M8 x 1.25 2 Camshaft Sprocket Bolt
M10 x 1.5
Camshaft Sprocket Bolt
M10 x 1.5Intake And Exhaust
1 Intake Manifold Bolts
M6 x 1.0
Intake Manifold Bolts
M6 x 1.0 2 Exhaust Manifold Bolts
M8 x 1.25
Exhaust Manifold Bolts
M8 x 1.25Fuel System
1 Fuel Rail Bolts
M6 x 1.0
Fuel Rail Bolts
M6 x 1.0 2 Fuel Injector Bolts
M6 x 1.0
Fuel Injector Bolts
M6 x 1.0 5g Tronic Transmission
Torque specifications for 5g Tronic Transmission
5g Tronic Transmission
Torque specifications for 5g Tronic Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.5
Transmission Mounting Bolts
M12 x 1.5Transmission Oil Pan
1 Transmission Oil Pan Bolts
M8 x 1.25
Transmission Oil Pan Bolts
M8 x 1.25Transmission Fluid System
1 Transmission Drain and Fill Plugs
M14 x 1.5
Transmission Drain and Fill Plugs
M14 x 1.5 2 Transmission Fluid Drain/Fill Plug
M14 x 1.5
Transmission Fluid Drain/Fill Plug
M14 x 1.5Transmission Pan Gasket
1 Transmission Pan Gasket Bolts
M10 x 1.25
Transmission Pan Gasket Bolts
M10 x 1.25Transmission Filter
1 Transmission Filter Bolts
M8 x 1.25
Transmission Filter Bolts
M8 x 1.25Transmission Cooler Line Fittings
1 Transmission Cooler Line Fittings
M12 x 1.5
Transmission Cooler Line Fittings
M12 x 1.5Torque Converter
1 Torque Converter Bolts
M14 x 1.5
Torque Converter Bolts
M14 x 1.5 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 1.5
Transmission Mounting Bolts
M12 x 1.5Transmission Oil Pan
1 Transmission Oil Pan Bolts
M8 x 1.25
Transmission Oil Pan Bolts
M8 x 1.25Transmission Fluid System
1 Transmission Drain and Fill Plugs
M12 x 1.5
Transmission Drain and Fill Plugs
M12 x 1.5 2 Transmission Fluid Drain/Fill Plug
M12 x 1.5
Transmission Fluid Drain/Fill Plug
M12 x 1.57G Tronic Transmission Pan
1 7G-Tronic Transmission Pan Bolts
M8 x 1.25
7G-Tronic Transmission Pan Bolts
M8 x 1.257G Tronic Transmission Filter
1 7G-Tronic Transmission Filter Bolts
M6 x 1
7G-Tronic Transmission Filter Bolts
M6 x 17G Tronic Transmission Solenoid Pack
1 7G-Tronic Transmission Solenoid Pack Bolts
M6 x 1
7G-Tronic Transmission Solenoid Pack Bolts
M6 x 17G Tronic Transmission Valve Body
1 7G-Tronic Transmission Valve Body Bolts
M8 x 1.25
7G-Tronic Transmission Valve Body Bolts
M8 x 1.257G Tronic Transmission Torque Converter
1 7G-Tronic Transmission Torque Converter Bolts
M10 x 1.5
7G-Tronic Transmission Torque Converter Bolts
M10 x 1.5 Body
Torque specifications for Body
Body
Torque specifications for Body
Suspension And Steering
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Strut/Shock Absorber Mounting Bolts
M14 x 1.5 2 Control Arm Bolts
M12 x 1.25
Control Arm Bolts
M12 x 1.25 3 Ball Joint Nut
M16 x 1.5
Ball Joint Nut
M16 x 1.5 4 Tie Rod End Nut
M14 x 1.25
Tie Rod End Nut
M14 x 1.25 5 Sway Bar Link Nut
M12 x 1.25
Sway Bar Link Nut
M12 x 1.25 6 Steering Gear/Rack Bolts
M16 x 1.5
Steering Gear/Rack Bolts
M16 x 1.5Body And Frame
1 Body Mounting Bolts
M14 x 1.5 (estimated)
Body Mounting Bolts
M14 x 1.5 (estimated) 2 Door Hinge Bolts
M10 x 1.25 (estimated)
Door Hinge Bolts
M10 x 1.25 (estimated) 3 Hood Hinge Bolts
M10 x 1.25 (estimated)
Hood Hinge Bolts
M10 x 1.25 (estimated) 4 Trunk Lid Hinge Bolts
M10 x 1.25 (estimated)
Trunk Lid Hinge Bolts
M10 x 1.25 (estimated) 5 Bumper Mounting Bolts
M12 x 1.25 (estimated)
Bumper Mounting Bolts
M12 x 1.25 (estimated) Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Caliper and Mounting
1 Brake Caliper Bolts
M12 x 1.5
Brake Caliper Bolts
M12 x 1.5 2 Brake Caliper Mounting Bracket Bolts
M12 x 1.5
Brake Caliper Mounting Bracket Bolts
M12 x 1.5Brake Disc/Drum and Wheel
1 Brake Disc/Drum Retaining Bolts
M10 x 1.25
Brake Disc/Drum Retaining Bolts
M10 x 1.25 2 Wheel Lug Nuts
M14 x 1.5
Wheel Lug Nuts
M14 x 1.5Brake Master Cylinder and Booster
1 Brake Master Cylinder Mounting Bolts
M8 x 1.25
Brake Master Cylinder Mounting Bolts
M8 x 1.25 2 Brake Booster Mounting Bolts
M8 x 1.25
Brake Booster Mounting Bolts
M8 x 1.25ABS Module and Brake Lines
1 ABS Module Mounting Bolts
M6 x 1.0
ABS Module Mounting Bolts
M6 x 1.0 2 Brake Line Fittings
M10 x 1.25
Brake Line Fittings
M10 x 1.25 Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine
1 Flywheel Bolts
M12 x 1.5
Flywheel Bolts
M12 x 1.5 2 Main Bearing Bolts
M10 x 1.25
Main Bearing Bolts
M10 x 1.25 3 Connecting Rod Nuts
M8 x 1.25
Connecting Rod Nuts
M8 x 1.25Transmission
1 Transmission Mounting Bolts
M14 x 1.5
Transmission Mounting Bolts
M14 x 1.5 2 Transmission Oil Pan Bolts
M8 x 1.25
Transmission Oil Pan Bolts
M8 x 1.25Driveshaft and Axles
1 Drive Axle/Half Shaft Bolts
M12 x 1.5
Drive Axle/Half Shaft Bolts
M12 x 1.5 2 CV Joint/Axle Nut
M16 x 1.5
CV Joint/Axle Nut
M16 x 1.5Differential
1 Differential Drain/Fill Plug
M12 x 1.5
Differential Drain/Fill Plug
M12 x 1.5Transfer Case
1 Transfer Case Mounting Bolts
M14 x 1.5
Transfer Case Mounting Bolts
M14 x 1.5 Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Electrical Accessories
1 Alternator Mounting Bolts
M12 x 1.5
Alternator Mounting Bolts
M12 x 1.5 2 Starter Motor Mounting Bolts
M14 x 1.5
Starter Motor Mounting Bolts
M14 x 1.5Electrical Connections
1 Battery Terminal Nuts
M8 x 1.25
Battery Terminal Nuts
M8 x 1.25 2 Fuel Pump Electrical Connector Bolts
M6 x 1
Fuel Pump Electrical Connector Bolts
M6 x 1 3 A/C Compressor Electrical Connector Bolts
M6 x 1
A/C Compressor Electrical Connector Bolts
M6 x 1Ignition System
1 Ignition Coil Mounting Bolts
M10 x 1.5
Ignition Coil Mounting Bolts
M10 x 1.5 Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Exhaust System
1 Exhaust Manifold/Headers Bolts
M12 x 1.5
Exhaust Manifold/Headers Bolts
M12 x 1.5 2 Exhaust Manifold/Headers to Cylinder Head Bolts
M12 x 1.5
Exhaust Manifold/Headers to Cylinder Head Bolts
M12 x 1.5 3 Catalytic Converter to Exhaust Pipe Bolts
M12 x 1.5
Catalytic Converter to Exhaust Pipe Bolts
M12 x 1.5Emissions Sensors
1 Oxygen Sensor Bolts
M10 x 1.25
Oxygen Sensor Bolts
M10 x 1.25 2 Lambda Sensor Bolts
M10 x 1.25
Lambda Sensor Bolts
M10 x 1.25 3 NOx Sensor Bolts
M10 x 1.25
NOx Sensor Bolts
M10 x 1.25EGR System
1 EGR Valve Bolts
M8 x 1.25
EGR Valve Bolts
M8 x 1.25Diesel Particulate Filter (DPF)
1 DPF Bolts
M14 x 1.5
DPF Bolts
M14 x 1.5 Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold
1 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25 2 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25Catalytic Converter
1 Catalytic Converter to Exhaust Pipe Bolts
M8 x 1.25
Catalytic Converter to Exhaust Pipe Bolts
M8 x 1.25Muffler
1 Muffler to Exhaust Pipe Bolts
M8 x 1.25
Muffler to Exhaust Pipe Bolts
M8 x 1.25Heat Shield
1 Exhaust Heat Shield Bolts
M6 x 1.0
Exhaust Heat Shield Bolts
M6 x 1.0Exhaust Hanger
1 Exhaust Hanger Bolts
M8 x 1.25
Exhaust Hanger Bolts
M8 x 1.25Oxygen Sensor
1 Oxygen Sensor Mounting Bolts
M12 x 1.5
Oxygen Sensor Mounting Bolts
M12 x 1.5Exhaust Flange
1 Exhaust Flange Bolts (Downpipe to Midpipe)
M8 x 1.25
Exhaust Flange Bolts (Downpipe to Midpipe)
M8 x 1.25 Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Intake System
1 Throttle Body Bolts
M8 x 1.25
Throttle Body Bolts
M8 x 1.25 2 Intake Manifold Bolts
M10 x 1.5
Intake Manifold Bolts
M10 x 1.5Fuel System
1 Fuel Rail Bolts
M8 x 1.25
Fuel Rail Bolts
M8 x 1.25 2 Fuel Injector Bolts
M8 x 1.25
Fuel Injector Bolts
M8 x 1.25 3 Fuel Pump Mounting Bolts
M12 x 1.5
Fuel Pump Mounting Bolts
M12 x 1.5Fuel Tank and Filler System
1 Fuel Tank Strap Bolts
M14 x 2.0
Fuel Tank Strap Bolts
M14 x 2.0 2 Fuel Filler Neck Bolts
M8 x 1.25
Fuel Filler Neck Bolts
M8 x 1.25Fuel Filter and Pressure Regulator
1 Fuel Filter Bolt/Nut
M12 x 1.5
Fuel Filter Bolt/Nut
M12 x 1.5 2 Fuel Pressure Regulator Mounting Bolts
M10 x 1.5
Fuel Pressure Regulator Mounting Bolts
M10 x 1.5 Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
A/C Compressor
1 A/C Compressor Mounting Bolts
M10 x 1.5
A/C Compressor Mounting Bolts
M10 x 1.5 2 A/C Compressor Clutch Bolt
M8 x 1.25
A/C Compressor Clutch Bolt
M8 x 1.25A/C Condenser
1 A/C Condenser Mounting Bolts
M12 x 1.75
A/C Condenser Mounting Bolts
M12 x 1.75A/C Evaporator
1 A/C Evaporator Mounting Bolts
M8 x 1.25
A/C Evaporator Mounting Bolts
M8 x 1.25A/C Refrigerant Lines
1 A/C Line Fittings
M6 x 1.0
A/C Line Fittings
M6 x 1.0 2 A/C Refrigerant Line Bracket Bolts
M6 x 1.0
A/C Refrigerant Line Bracket Bolts
M6 x 1.0 Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Strut And Shock Absorber
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Strut/Shock Absorber Mounting Bolts
M14 x 1.5Control Arm
1 Control Arm Bolts
M12 x 1.25
Control Arm Bolts
M12 x 1.25 2 Upper Control Arm Bushing Bolts
M10 x 1.25
Upper Control Arm Bushing Bolts
M10 x 1.25 3 Lower Control Arm Bushing Bolts
M10 x 1.25
Lower Control Arm Bushing Bolts
M10 x 1.25Steering
1 Ball Joint Nut
M16 x 1.5
Ball Joint Nut
M16 x 1.5 2 Tie Rod End Nut
M14 x 1.25
Tie Rod End Nut
M14 x 1.25 3 Steering Knuckle Bolts
M16 x 1.5
Steering Knuckle Bolts
M16 x 1.5 4 Hub/Wheel Bearing Bolts
M14 x 1.25
Hub/Wheel Bearing Bolts
M14 x 1.25Sway Bar
1 Sway Bar Link Nut
M12 x 1.25
Sway Bar Link Nut
M12 x 1.25Troubleshooting 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
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
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
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 correct torque value for the cylinder head bolts on a 2007-2014 Mercedes C-Class?
What IS the correct torque value for the cylinder head bolts on a 2007-2014 Mercedes C-Class?
The torque specification for the cylinder head bolts on a 2007-2014 Mercedes C-Class IS 90 Nm (66 lb-ft) plus an additional 90-degree turn.
Q2 What type of torque wrench should I use to tighten bolts on my Mercedes C-Class?
What type of torque wrench should I use to tighten bolts on my Mercedes C-Class?
It IS recommended to use a calibrated torque wrench that meets or exceeds DIN EN ISO 6789 standards when tightening bolts on a Mercedes C-Class.
Q3 Can I use a standard torque wrench to tighten bolts on my Mercedes C-Class's engine?
Can I use a standard torque wrench to tighten bolts on my Mercedes C-Class's engine?
No. It IS not recommended to use a standard torque wrench to tighten bolts on the engine of a Mercedes C-Class. The engine bolts require a precise torque value and a standard torque wrench may not provide sufficient accuracy.
Q4 What IS the recommended torque value for the spark plugs on a Mercedes C-Class?
What IS the recommended torque value for the spark plugs on a Mercedes C-Class?
The recommended torque value for the spark plugs on a 2007-2014 Mercedes C-Class IS 28 Nm (21 lb-ft).
Q5 Can I use an impact wrench to tighten bolts on my Mercedes C-Class?
Can I use an impact wrench to tighten bolts on my Mercedes C-Class?
No. Impact wrenches are not recommended for use on Mercedes C-Class vehicles as they can cause damage to the bolts and surrounding components.
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
Ratchet and Socket Set (Metric)
Essential for accessing and tightening bolts, ensuring proper engagement and torque application.
- Socket sizes to fit all bolt heads
- Ratchet for efficient and controlled tightening
- Extension bars for reaching bolts in confined spaces
Torque Wrench (10-100 Nm)
Required for precise torque application, preventing under or over-tightening.
- Calibrated for accurate torque readings
- Adjustable torque range to cover all specifications
- Click or audible signal when target torque IS reached
Service Procedures
Bolt Torque Specifications for 2007-2014 Mercedes-Benz C-Class
Comprehensive guide to torque specifications for various components.
- Overview of torque values for engine, suspension, brakes, and other components
- Safety tips and precautions for working on vehicles
- Specific instructions and diagrams for tightening bolts
Technical Service Bulletins
TSB 20-01-04: Improper Bolt Torque on Cylinder Head
2020-01-04Concerns loose cylinder head bolts due to incorrect torque values.
Resolution: Inspect and re-torque cylinder head bolts to specified values
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