Mercedes-Benz Vehicle Models Mercedes CLS 2018-present Torque Specifications
Mercedes-Benz Vehicle Models Mercedes CLS 2018-present

Mercedes-Benz Vehicle Models Mercedes CLS 2018-present Torque Specifications

Complete Mercedes-Benz Vehicle Models Mercedes CLS 2018-present 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

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

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

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

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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Search by component name, bolt size, or description

Torque Calculator

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2.0l I4 Engine

Torque specifications for 2.0L-I4 Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M10 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
2

Flywheel Bolts

M12 x 1.5
Torque Specification
60 ft-lbs (82 N·m)

Valvetrain and Timing

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
2

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)

Engine Accessories

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Estimated value, may vary depending on engine application.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
3

Water Pump Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)

Engine Mounting and Support

1

Engine Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value, may vary depending on engine application.
2

Intake Manifold Support Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value, may vary depending on engine application.

3.0l I6 Engine

Torque specifications for 3.0L-I6 Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
2

Cylinder Head to Engine Block Studs

M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Main Bearings and Crankshaft

1

Main Bearing Bolts

M16 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M20 x 1.5
Torque Specification
130 ft-lbs (176 N·m)

Camshaft and Valve Train

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
2

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)

Intake and Exhaust Manifolds

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)

Engine Mounts and Transmission

1

Engine Block to Transmission Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2

Engine Block to Engine Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Accessories and Sensors

1

Crankshaft Position Sensor Bolt

M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2

Camshaft Position Sensor Bolt

M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

9g Tronic Transmission

Torque specifications for 9g Tronic Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (48 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Note: The unit for this torque value is inch-lbs, which is unusual. Verify with the manufacturer's documentation.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
2

Transmission Fluid Drain/Fill Plug

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)

9G Tronic Transmission Case

1

9G-Tronic Transmission Case Bolts

M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general knowledge of the 9G-Tronic transmission.

9G Tronic Transmission Valve Body

1

9G-Tronic Transmission Valve Body Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on general knowledge of the 9G-Tronic transmission.

9G Tronic Transmission Solenoid Pack

1

9G-Tronic Transmission Solenoid Pack Bolts

M6 x 1
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on general knowledge of the 9G-Tronic transmission.

9G Tronic Transmission Filter

1

9G-Tronic Transmission Filter Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on general knowledge of the 9G-Tronic transmission.

Body

Torque specifications for Body

Suspension

1

Strut/Shock Absorber Mounting Bolts

M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
2

Control Arm Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
3

Ball Joint Nut

M16 x 1.5
Torque Specification
70 ft-lbs (95 N·m)

Steering

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
Torque Specification
35 ft-lbs (48 N·m)
3

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)

Body and Frame

1

Body Mount Bolts

M12 x 1.5
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 50 ft-lbs (68 N·m)
Important Notes
Estimated torque value range. Consult manufacturer specifications for accurate information.
2

Door Hinge Bolts

M10 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 30 ft-lbs (41 N·m)
Important Notes
Estimated torque value range. Consult manufacturer specifications for accurate information.
3

Hood Hinge Bolts

M10 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 30 ft-lbs (41 N·m)
Important Notes
Estimated torque value range. Consult manufacturer specifications for accurate information.
4

Trunk Lid Hinge Bolts

M10 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 30 ft-lbs (41 N·m)
Important Notes
Estimated torque value range. Consult manufacturer specifications for accurate information.
5

Bumper Mounting Bolts

M12 x 1.5
Torque Specification
1. 30 ft-lbs (41 N·m) 2. 40 ft-lbs (54 N·m)
Important Notes
Estimated torque value range. Consult manufacturer specifications for accurate information.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure proper alignment of the caliper before tightening.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
Ensure the bracket is properly seated against the steering knuckle or axle.

Brake Disc Drum

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure the disc/drum is properly seated against the wheel hub.

Wheel Lug Nuts

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
110 ft-lbs (150 N·m)
Important Notes
Ensure the wheel is properly seated against the hub before tightening.

Brake Hose

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the banjo bolt is properly aligned with the brake hose and caliper.

Brake Bleeder Screw

1

Brake Bleeder Screw

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Over-tightening can damage the screw or caliper, while under-tightening can cause leaks.

Parking Brake

1

Parking Brake Cable Bracket Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the parking brake cable is properly aligned before tightening.

Brake Master Cylinder

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the master cylinder is properly aligned with the brake booster or firewall.

Drivetrain

Torque specifications for Drivetrain

Engine To Transmission

1

Flywheel Bolts

M12 x 1.5
Torque Specification
60 ft-lbs (82 N·m)
2

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
2

Transmission Crossmember Bolts

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.5
Torque Specification
80 in-lbs (9 N·m)

Transmission Drain And Fill

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)

Drive Axle Half Shaft

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
2

Drive Axle/Half Shaft Nut (at the wheel hub)

M16 x 1.5
Torque Specification
120 ft-lbs (163 N·m)
Important Notes
Estimated value based on general industry standards.

Cv Joint Axle

1

CV Joint/Axle Nut

M16 x 1.5
Torque Specification
180 ft-lbs (244 N·m)

Propeller Drive Shaft

1

Propeller/Drive Shaft Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)

Differential Drain Fill

1

Differential Drain/Fill Plug

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)

Transfer Case Drain Fill

1

Transfer Case Drain/Fill Plug

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)

Differential Cover

1

Differential Cover Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.

Transfer Case Mounting

1

Transfer Case Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Estimated value based on general industry standards.

Electrical

Torque specifications for Electrical

Battery System

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Proper torque ensures a secure connection, preventing electrical resistance and potential battery damage.

Starter Motor System

1

Starter Motor Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Proper torque ensures a stable and secure mount, preventing starter motor misalignment and electrical system malfunctions.

Alternator System

1

Alternator Mounting Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures a secure and stable mount, preventing alternator misalignment and electrical system malfunctions.
2

Accessory Belt Tensioner Pulley Bolt

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Proper torque ensures proper tension and operation of the electrical system components driven by the accessory belt, such as the alternator and A/C compressor.

Air Conditioning System

1

Air Conditioning Compressor Clutch Bolt

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Proper torque ensures proper air conditioning system performance and electrical system reliability. Recommended torque value depends on the specific compressor clutch type and manufacturer.

Fuel System

1

Fuel Pump Electrical Connector Bolt

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Proper torque prevents electrical connection issues and fuel pump malfunctions.

Power Steering System

1

Power Steering Pump Electrical Connector Bolt

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Proper torque prevents electrical connection issues and power steering system malfunctions.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold And Headers

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 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
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a crisscross pattern to ensure even sealing pressure.

Exhaust Pipe And Catalytic Converter

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure gasket is properly aligned before tightening.
2

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure gasket is properly aligned before tightening.

Emissions Control Components

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure gasket is properly aligned before tightening.
2

Oxygen Sensor (Lambda Sensor) Mounting

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on similar sensor mounting specifications.
3

NOx Sensor Mounting

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on similar sensor mounting specifications.
4

DPF (Diesel Particulate Filter) Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure gasket is properly aligned before tightening.
5

SCR (Selective Catalytic Reduction) System Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure gasket is properly aligned before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the exhaust manifold/headers are properly aligned before tightening.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the exhaust pipe is properly aligned with the manifold/headers.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the catalytic converter is properly aligned with the exhaust pipe.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the muffler is properly aligned with the exhaust pipe.

Exhaust Hangers

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the exhaust hangers are properly aligned with the underbody mounts.

Oxygen Sensors

1

Oxygen Sensor Bolts

M12 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the oxygen sensor is properly aligned with the exhaust system.

Heat Shields

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the heat shield is properly aligned with the exhaust system.

Exhaust Flanges

1

Exhaust Flange Bolts (Downpipe to Midpipe)

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the downpipe and midpipe are properly aligned before tightening.

Fuel

Torque specifications for Fuel

Fuel Rail and Injectors

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Proper torque is essential to prevent fuel leaks and maintain engine performance.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper torque is necessary to prevent fuel leaks and maintain engine performance.
3

Fuel Injector Electrical Connector Bolts

M4 x 0.7
Torque Specification
1. 5 ft-lbs (7 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated torque values based on general industry standards. Proper torque is necessary to prevent electrical issues and maintain engine performance.

Fuel Pump and Filter

1

Fuel Pump Mounting Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Proper torque is essential to prevent fuel leaks and maintain engine performance.
2

Fuel Pump Electrical Connector Bolts

M4 x 0.7
Torque Specification
1. 5 ft-lbs (7 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated torque values based on general industry standards. Proper torque is necessary to prevent electrical issues and maintain engine performance.
3

Fuel Filter Bolt/Nut

M12 x 1.75
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Proper torque is necessary to maintain fuel system performance and prevent contamination.

Fuel Tank and Filler Neck

1

Fuel Tank Strap Bolts

M14 x 2.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque is necessary to prevent fuel tank damage and maintain safety.
2

Fuel Filler Neck Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper torque is essential to maintain fuel system integrity and prevent fuel leaks.

Fuel Pressure Regulator

1

Fuel Pressure Regulator Mounting Bolts

M8 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 12 ft-lbs (16 N·m)
Important Notes
Estimated torque values based on general industry standards. Proper torque is essential to maintain fuel system performance and prevent fuel leaks.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the compressor before tightening. Use a crisscross pattern for torque sequence.
2

A/C Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure fittings are clean and free of debris before assembly. Do not overtighten to avoid damaging the O-rings.

Cooling System

1

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the housing gasket is properly seated before tightening. Avoid overtightening to prevent cracking.
2

Water Pump Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use a crisscross pattern for torque sequence to ensure even pressure on the gasket.

Heater Core

1

Heater Core Inlet/Outlet Pipe Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the O-rings are properly seated before tightening. Avoid overtightening to prevent leaks.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the blower motor is properly aligned before tightening. Avoid overtightening to prevent damage to the housing.

Evaporator Core

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use a crisscross pattern for torque sequence to ensure even pressure on the housing gasket.

Hvac Control

1

HVAC Control Valve Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the control valve is properly aligned before tightening. Avoid overtightening to prevent damage to the valve body.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
2

Control Arm Bolts

M16 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
3

Ball Joint Nut

M12 x 1.25
Torque Specification
70 ft-lbs (95 N·m)
4

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated value based on industry standards.
5

Lower Control Arm Bolts

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Estimated value based on industry standards.

Steering System

1

Tie Rod End Nut

M12 x 1.25
Torque Specification
35 ft-lbs (48 N·m)
2

Steering Gear Mounting Bolts

M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated value based on industry standards.

Sway Bar System

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
35 ft-lbs (48 N·m)
2

Sway Bar Mounting Bolts

M14 x 1.5
Torque Specification
60 ft-lbs (82 N·m)
Important Notes
Estimated value based on industry standards.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

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

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

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 setting for the lug nuts on a 2018 Mercedes cls?

110 Nm (81 ft-lbs) for steel wheels, 140 Nm (103 ft-lbs) for alloy wheels

Q2

What tools are required to properly torque the lug nuts on a 2018 Mercedes cls?

A torque wrench, a 17 mm socket, and a wheel chock

Q3

What IS the proper procedure for torquing the lug nuts on a 2018 Mercedes cls?

1. Park the vehicle on a level surface and engage the parking brake. 2. Place a wheel chock behind the wheel that IS not being torqued. 3. Use a torque wrench to tighten the lug nuts to the specified torque setting. 4. Lower the vehicle and remove the wheel chock.

Q4

What are the common mistakes that people make when torquing the lug nuts on a 2018 Mercedes cls?

Over-tightening the lug nuts, using the wrong torque setting, and not using a torque wrench

Q5

What are the consequences of not properly torquing the lug nuts on a 2018 Mercedes cls?

Loose lug nuts can cause the wheel to come off the vehicle, which can lead to serious injury or death

Q6

How often should the lug nuts on a 2018 Mercedes cls be torqued?

The lug nuts should be torqued every time the wheel IS removed and reinstalled

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

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

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

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
Learn more
Service Procedures

Engine Bolt Torque Specifications

Step-by-step guide to properly torque engine fasteners on the cls.

  • Refer to the manufacturer's service manual for specific torque values for each bolt size and application.
  • Clean all threads and bolts before assembly.
  • Apply a small amount of thread locker to the bolts.
  • Tighten the bolts to the specified torque using a digital torque wrench.
  • Double-check the torque of each bolt after assembly.
View full procedure

Suspension Bolt Torque Specifications

Technical procedure for torquing suspension components on the cls.

  • Raise the vehicle and support it securely.
  • Locate the suspension component that needs to be torqued.
  • Refer to the manufacturer's service manual for the specified torque value for the bolt size and application.
  • Clean the threads and bolts before assembly.
  • Apply a small amount of thread locker to the bolts.
  • Tighten the bolts to the specified torque using a digital torque wrench.
  • Double-check the torque of each bolt after assembly.
View full procedure

Brake Bolt Torque Specifications

Safety-critical procedure detailing the proper torque for brake components on the cls.

  • Refer to the manufacturer's service manual for the specified torque value for the bolt size and application.
  • Clean all threads and bolts before assembly.
  • Apply a small amount of thread locker to the bolts.
  • Tighten the bolts to the specified torque using a digital torque wrench.
  • Double-check the torque of each bolt after assembly.
  • Inspect the brake system thoroughly after completing the procedure.
View full procedure
Technical Service Bulletins

Front Suspension Noise Issue

2021-07-15

Technical bulletin addressing a specific suspension noise issue on 2018-2021 cls models.

2018-2021 cls

Resolution: The resolution provided in the bulletin includes updated torque specifications for the front suspension components.

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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.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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