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. In this repair guide we will show you how to replace the automatic transmission mount. Replacing the transmission mount is easy and you can change it in less than an hour. When it comes to motor mounts do not replace them with used parts.
|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|
Parts & Tools Required
You will need a new transmission mount. We don’t recommend installing used transmission mount because even though the mount may look in good shape it doesn’t mean it is. The rubber will loose elasticity over the years and it will transmit the vibration from the transmission to the chassis and therefore the cabin. You can find a new transmission mount for as low as $20 even the OEM, check out these Amazon listings for example.
Other than a standard set of socket and your typical tools you don’t need anything else other than a torque wrench.
Do It Yourself Repair Instructions
Locate transmission mount
The transmission mount is located at the middle of the vehicle. You may not be able to see it if the car has an undercarriage plastic cover also known as splash shield.
Remove undercarriage plastic cover / splash shield
You will need to remove about 6 screws to remove the splash shield. Use a 8 mm socket to remove the bolts shown in the picture. Typically Mercedes-Benz have three splash shields. You need to remove the last one. The first one is near the front bumper and the last one is the transmission splash shield towards the middle of the car.
Remove two bolts to supporting bracket
Remove the two bolts shown in the picture using your 13 mm socket. You do not need to support the transmission at this point.
Use a block of wood to place under the transmission and raise until the transmission mount raises about 1/4 inch from the suppport bracket.
Remove two bolts on the transmission mount
Remvoe the 16mm bolts that connect the mount to the transmission. Once these two bolts are removed you will be able to remove the old transmission mount and install the new.
Install the two 13 mm bolts.
Slowly lower the transmission. Make sure that the two holes line up so that you will be able to bolt the two bolts that tie the transmission mount to the support bracket. Torque the two 13 mm bolts to approximately 25 ft lbs.
Install the splash shield / undercarriage plastic cover.
Reinstall the undercarriage plastic cover by fastening the 8 mm bolts. Then lower the vehicle.
How to replace Mercedes-Benz transmission mounts videos.
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List of helpful resources from the web related to this repair.
Frequently Asked Questions
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 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 that typically then don’t need to checked or replaced on a regular basis. 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 are feeling vibration in your seat, steering wheel or cabin you should replace the two engine mounts and the transmission mount as well. You may replace the defective one but the other mounts will not last very 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. If any mechanic charges more than 3 hours of labor to replace the two engine mounts and one transmission mount than they are taking too long. If you doing 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 labour. First time Do It Yourself it can take up to one hour.
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 exact same OEM part that the Mercedes-Benz use. You can find LEMFORDER motor mounts on Amazonfor much less than what the 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
- 2 20 24 00418,2 20 24 00218
- 2 12 24 00418,2 20 24 00518
These instrcutions 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
- 16 mm bolts between the transmission and the mount- 35ft-lb.
- 13 mm bolts between the mount and the support bracket -25 ft-lb.