In this repair guide, we will show you how to replace the engine mounts on your Mercedes-Benz. These instructions apply to Mercedes-Benz cars with the V6 and V8 engine. Many Mercedes-Benz owners experience vibrations through the interior of the car, the steering wheel and the seat which is the first sign that your engine mounts have failed. One of our earlier posts shows you how to check if you have defective motor mounts and you can learn how to perform by reading this article.
There is also a transmission mount also referred to as the rear engine mount, the do-it-yourself instructions for replacing that mount can be found here.
|Model:||E CLA SLK ML S Class|
|DIY Cost||Under $150|
It is recommended that you disconnect the main battery before you start working on your car to complete this repair. It will be a lot easier if you use vehicle ramps such as the RhinoGear 11909ABMI RhinoRamps Vehicle Ramp – Pair (12,000lb. GVW Capacity) instead of jacking up the car with a jack. Make sure to use jack stand (Bestselling Jack stand on Amazon) to secure the car.
You will need a set of sockets and a metirc wrench set to complete this repair which you most likely already have.
One tool that you don’t have which is a must for this job is the Mercedes Benz Offset Engine Mount Wrench 16mm. You could technically remove the bolt without this tool but it is much more difficult. The wrench sells for under $20 on Amazon and is well worth it.
You will need a new set of engine mounts. If you buy aftermarket make sure to get oil filled engine mounts. The original mounts on the Mercedes-Benz are made by Lemforder. If you take a look at these engine mount listings on Amazon you will find Lemforder engine mounts as well being sold at a fraction of dealer prices.
You have a total of three mounts. One of each side of the engine and one for the rear of the engine (transmission mount). You can purchase all three of the OEM Lemforder mounts online for around $150. >>>
Do It Yourself Repair Instructions
Remove engine cover /air filter housing
Open the hood, remove the two air ducts by pulling them away from the engine cover. Grab the engine cover on both sides and pull it up.
Jack up the car or roll it up on ramps if you have a set. Make sure to place jack stands under the car to secure it. You will need a second jack to support the engine at a latter stage.
Remove engine splash shield
Remove the plastic undercarriage cover / splash shield from the bottom of the engine. There are several 8 mm screws that need to be removed.
Once you remove the two bolts for the engine mounts which we will show you in the next few steps, you will not be able to pull the engine mounts out. The problem is that there isn’t enough room to allow you to pull out the old engine mounts. Therefore, you will need to remove something else. You have two options.
Option 1 – Remove exhaust
The first option is to remove the exhaust in order to pull out the engine mount. This is the same procedure that the dealer follows.
Option 2 – Remove alternator and A/C compressor
The other option is to remove the serpentine belt. To remove the passenger side mount you will need to remove the two bolts for the alternator. You don’t need to unplug the alternator, just slide it out of the way and you will be able to pull out the mount. To get the AC compressor out the way you will need to remove the three bolts that hold the A/C compressor in place. You don’t need to remove the A/C or unplug it. Check out the article on how to remove alternator.
Support engine and lift it one inch
Support the engine under the oil pan. Since you have the bolt on top of the engine mount removed you can light the engine about one inch. Be careful not to try to raise the engine too much.
Remove bottom bolt
Remove the bolt at the bottom of the engine mount. This should be a 13 bolt that should break loose fairly easy.
Remove engine mounts
Remove the engine mount. If you removed the exhaust you will be removing the mounts from underneath. If you loosened the A/C compressor the alternator and moved them out of the way you will be removing the alternator from the engine bay.
Install new mounts
Install the new mount. Make sure that you position the heat shield correctly. There is a lock pin that you can not miss that needs to align properly for the heat shield and the bolt to install properly.
Engine Mounts Installation Pictures
Related How To Repair Videos
MB E320 2003 Engine mount replacement
How to replace Mercedes W208 W210 W203
Mercedes Benz C240 Replacing Motor Mount
Here is a list of related how-to articles. The instructions are similar for all the different Mercedes-Benz models. The hardest part of replacing the motor mounts on a Mercedes-Benz is getting them out.
- Exhaust Manifold Front Flange – 20 Nm
- Bolt between the engine mount and engine support – 55 Nm
- Bottom Bolt between the engine the axle carrier – 35Nm
Applicable Models and Part Numbers
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