Mercedes-Benz lunking Noises: Acceleration and Throttle Lift Off

Mercedes-Benz Tech Tip: Clunking Noises Heard During Acceleration And Throttle Lift Off

Owners of Mercedes-Benz cars with front-wheel drive and 4x4 vehicles, may complain of a single throttle lift-off clunking noise from the side shaft when first taking off (audible at the outboard end). Also, the clunk is heard once when changing from forward to reverse.

Photo 1

Models: All Mercedes-Benz cars with front-wheel drive and 4×4 vehicles.

Complaint: Single throttle lift-off clunking noise from the side shaft when first taking off (audible at the outboard end). Also, the clunk is heard once when changing from forward to reverse.

Cause: If the complaint is eliminated by experimentally loosening the outboard collar nut by one turn, the complaint is likely due to micro-movement in the connection between the wheel bearing inner race and the joint housing of the side shaft.

Note:
The collar nut must always be replaced after being loosened and must be tightened to the specified torque.

Photo 2

Remedy: Coat the contact surface of the shaft with wheel bearing using Molykote paint. To do this, proceed as follows:
1. Remove the outboard side shafts.
2. Clean the contact surface A (see Photo 1), making sure it is free of debris and oil.
3. Coat the contact surface A (see Photo 2) with Molykote and allow it to dry for one hour.
4. Reinstall the side shafts.

You May Also Like

Volvo Modular Engine Service

The Volvo Modular Series engine outlasted Ford and was retired by Geely. The Volvo modular design that can have four, five or six cylinders made its debut in 1990 in the 960 sedan as a six-cylinder and never stopped improving. VOLVO SPA AND CMT What is a Volvo? In 1999 the company was acquired by

The Volvo Modular Series engine outlasted Ford and was retired by Geely. The Volvo modular design that can have four, five or six cylinders made its debut in 1990 in the 960 sedan as a six-cylinder and never stopped improving.

VOLVO SPA AND CMT

What is a Volvo? In 1999 the company was acquired by Ford. By 2006 all of the boxy Volvo platforms were gone and replaced by Ford platforms. But, the engines remained uniquely Volvo. In 2010, Volvo was purchased by the Chinese automaker Geely, and the purge started again.

Audi Active Suspension Service

The key to servicing these systems is proper information and understanding precisely how these systems operate.

How To Service BMW Tire Monitor Systems

BMW has offered Tire Pressure Monitoring Systems (TPMS) for more than 20 years. These early indirect and direct systems were implemented not to meet the 2007 government mandate but to inform the driver when an expensive Michelin or Bridgestone run-flat tire was deflating. Some 2002 and 2003 models have an indirect system called Flat Tire

VW DSG Maintenance

A DSG transmission is lighter than a comparable automatic with the same number of speeds.

Tech Tip: Checking Transmission Fluid Levels When Cold or Hot

Checking the fluid level before the transmission has reached the specified temperature might cause a false reading

Other Posts

Now Available – March’s Digital Edition of ShopOwner

The March issue includes technical and management content and is free to download.

Now Available – February’s Digital Edition of ShopOwner

February’s issue includes technical and management content and is free to download.

Now Available – January’s Digital Edition of ShopOwner

January’s issue includes technical and management content and is free to download.

Servicing Mercedes-Benz AMG Brakes

Take a look at some of the things you need to know in order to service the brakes on a Mercedes-Benz AMG vehicle.