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DIY How to replace transmission mount Mercedes-Benz


If you have been experiencing vibration inside the cabin of your Mercedes-Benz, then your engine or transmission mounts may have failed. Typically the vibrations are worse at idle and may be less noticeable when driving. This repair guide will show you how to replace the automatic transmission mount. Replacing the transmission mount is easy; you can change it in less than an hour. When it comes to motor mounts, do not replace them with used parts.

The transmission mount in a Mercedes-Benz is an essential component that helps to secure and support the transmission. Over time, due to wear and tear, the transmission mount may become damaged or worn out, leading to several issues, such as excessive vibration, transmission misalignment, and even damage to other components.

Replacing the transmission mount in a Mercedes-Benz can help restore the vehicle’s smooth operation and improve driving comfort. The process typically involves removing and replacing the old mount with a new one.

Make: Mercedes-Benz
Model: E CLA SLK ML S Class
Years: 1998 1999 2000 01 02 03 04 05 06 07 08 09 2010 11 12 13 15
Difficulty: Easy
DIY Cost $15-$45
Dealer Cost $300-$500
Time: 45 Minutes

Tools Needed

  • 16mm & 13mm wrench
  • Jack Stands
  • Floor Jack
  • Push Clips Remover Tool

The center of the mount is slightly shifted by design, as shown in this picture. You will need a new transmission mount. We don’t recommend installing a used transmission mount because it may look in good shape, but it doesn’t mean it is. The rubber will lose elasticity over the years, transmitting the vibration from the transmission to the chassis and the cabin.


Replacing the transmission mount on a Mercedes-Benz can be a fairly involved process, so it’s important to have the right tools and follow the correct procedure. Here are the steps you should follow:

  1. Safety First: Before beginning any work on your vehicle, make sure it is parked on a level surface, with the engine turned off and the parking brake engaged. Wear appropriate safety gear, such as gloves and eye protection.
  2. Raise the vehicle using the jack that came with your car, or even better, use an aluminum jack. Make sure to secure the car by placing jack stands underneath. No, not work under a car unsupported by jack stands. The other option would be to use vehicle ramps. jack stands
  3. Access the mount: Locate the transmission mount, typically near the center of the car’s undercarriage, between the transmission and the vehicle’s chassis. Removing the vehicle’s undercarriage shield or other components may be necessary to access the mount.
  4. Remove the mount: Use a wrench or socket to remove the bolts securing the mount to the transmission and chassis. Once the bolts are removed, carefully lift the mount out of its position.
  5. Inspect the mount: Examine the old mount for signs of damage, such as cracks or excessive wear. If the mount appears damaged or worn, replace it with a new one.
  6. Install the new mount: Carefully place the new mount into position, aligning the bolt holes with those on the transmission and chassis. Replace the bolts and tighten them securely.
  7. Test the new mount: After the new mount is installed, start the engine and test the vehicle’s shifting and acceleration to ensure the mount is functioning properly.
  8. Clean up and replace components: Reinstall any removed components to access the mount, such as the undercarriage shield or other parts.

Overall, replacing the transmission mount on a Mercedes-Benz can be a complex process. If you’re uncomfortable doing the work yourself, having a qualified mechanic perform the task for you is best.

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Frequently Asked Questions

What are the symptoms of a failed Engine or Transmission Mount?

The #1 symptom of a failed transmission mount is vibration in your seat and cabin.

Other symptoms include:

  • Excessive engine and transmission movement when changing gears.
  • Noise or thump when you place the engine in gear.
  • Vibration at idle or when accelerating.

How often should I change the engine or transmission mounts?

The engine and transmission mounts are not part of regular maintenance, meaning they typically don’t need to be checked or replaced regularly. With that said, Mercedes-Benz engine and transmission mounts seem to fail between 80,000 and 120,000 miles. That’s when most owners start experiencing the vibrations on the steering wheel, inside the cabin, or on their seat, with the vibrations being the most noticeable when stopped at a light.

Should I replace the engine mounts at the same time as replacing the transmission mount?

If you feel the vibration in your seat, steering wheel, or cabin, replace the two engine mounts and the transmission mount. You may replace the defective one, but the other mounts will not last long if left in place.

How long does it take to replace the engine/transmission mounts?

An experienced mechanic should be able to do the job in less than 2 hours. Suppose any mechanic charges more than 3 hours of labor to replace the two engine mounts and one transmission mount; they take too long. If you do it yourself for the first time, give yourself 4 or 5 hours.

Replacing the transmission mount only can be done in 20 minutes by an experienced mechanic familiar with Mercedes-Benz cars even though you will most likely get charged for one hour of labor.  First-time Do It Yourself; it can take up to one hour.

What is the best / recommended brand for Mercedes-Benz motor and transmission mounts?

Our recommended brand for the motor and transmission mount is LEMFORDER. It is the same brand and OEM part that the Mercedes-Benz use. You can find LEMFORDER motor mounts on Amazonfor much less than what the dealer charges.

Applicable Models and Part Number

Related Part Numbers:

  • 220 240 0518
  • 212 240 0418
  • 209 211 215 220 230
  • 2200617  220 240 02 18
  • 2202400218
  • 2 20 24 00418,2 20 24 00218
  • 2 12 24 00418,2 20 24 00518
  • AM-2878323111

These instructions are very similar for the following years and models:

1997-00 Mercedes-Benz C230
2003-05 Mercedes-Benz C240
2001-02 Mercedes Benz C240
1998-00 Mercedes Benz C280
2002-04 Mercedes Benz C32 AMG
2003-05 Mercedes Benz C320
2001-02 Mercedes Benz C320
1997 Mercedes Benz C36 AMG
1998-00 Mercedes Benz C43 AMG
2005-06 Mercedes Benz C55 AMG
1998-05 Mercedes Benz CL500
2001-05 Mercedes Benz CL55 AMG
1998-05 Mercedes Benz CL600
2005 Mercedes Benz CL65 AMG
1998-05 Mercedes Benz CLK320
2006-09 Mercedes Benz CLK350
1999-02 Mercedes Benz CLK430
2003-05 Mercedes Benz CLK500
2001-05 Mercedes Benz CLK55 AMG
2007-09 Mercedes Benz CLK550
1997 Mercedes Benz E300
1997-09 Mercedes Benz E320
1997 Mercedes Benz E420
2000-02 Mercedes Benz E430
1998-99 Mercedes Benz E430
2003-05 Mercedes Benz E500
1999-05 Mercedes Benz E55 AMG
2002-08 Mercedes Benz G500
2003-04 Mercedes Benz G55 AMG
1997-99 Mercedes Benz S320
1996-99 Mercedes Benz S420
2003-05 Mercedes Benz S430
2000-02 Mercedes Benz S430
2003-05 Mercedes Benz S500
1996-02 Mercedes Benz S500
2001-05 Mercedes Benz S55 AMG
1996-05 Mercedes Benz S600
1997 Mercedes Benz SL320
1997 Mercedes Benz SL320
2003-05 Mercedes Benz SL500
1996-98 Mercedes Benz SL500
2003-05 Mercedes Benz SL500
1996-98 Mercedes Benz SL500
2003-05 Mercedes Benz SL55 AMG
1996-00 Mercedes Benz SL600
1998-04 Mercedes Benz SLK230
2002-04 Mercedes Benz SLK32 AMG
2001-04 Mercedes Benz SLK320


Torque Specifications

  • 16 mm bolts between the transmission and the mount- 35 ft-lb.
  • 13 mm bolts between the mount and the support bracket -25 ft-lb.



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