MB Medic Mercedes-Benz Repair Guides, Service, How To DIY
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In this guide (7 sections)
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 engines. Many Mercedes-Benz owners experience vibrations through the car’s interior, 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 engine mounts, and you can learn how to perform the check in our guide on how to check for bad engine mounts.
There is also a transmission mount referred to as the rear engine mount; the do-it-yourself instructions for replacing that mount can be found here. This guide covers the two engine mounts; the transmission mount is a separate component with its own replacement procedure.
| Make: | Mercedes-Benz |
| Model: | E CLA SLK ML S Class |
| Years: | 2003-2015 |
| Difficulty: | Difficult |
| DIY Cost | Under $150 |
| Dealer Cost | $600-$1100 |
| Time | 4-6 hours |
Preparation
Disconnect the main battery before starting work on your car. 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 a jack stand (Bestselling Jack stand on Amazon) to secure the car.
You will need a set of sockets and a metric wrench 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. Our guide to the offset 16 mm and 17 mm engine mount wrench shows what the tool looks like and why the offset matters. The wrench sells for under $20 on Amazon and is well worth it.
Parts Required
You will need a new set of engine mounts. If you buy aftermarket, make sure to get oil-filled engine mounts. Lemforder makes the original mounts for the Mercedes-Benz. 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 for each side of the engine and one for the rear of the engine (transmission mount). You can purchase all three OEM Lemforder mounts online for around $150. We recommend checking the exact part number and specified mount type.
Do It Yourself Repair Instructions
Remove the engine cover and air filter housing.
Open the hood and remove the two air ducts by pulling them away from the engine cover. Grab the engine cover on both sides and pull it up.
Raise the vehicle.
Jack up the car or roll it 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 later.
Remove the engine splash shield.
Remove the plastic undercarriage cover/splash shield from the bottom of the engine. Several 8 mm screws need to be removed.
Decide how you will make room to pull the mount out
Once you remove the two bolts that secure the engine mounts, which we will show you in the next few steps, you will be unable to pull the engine mounts out. The problem is that there isn’t enough room to remove the old engine mounts. Therefore, you will need to remove something else. You have two options.
Option 1 – Remove the exhaust
The first option is to remove the exhaust to pull out the engine mount. This is the same procedure that the dealer follows.
Option 2 – Remove the alternator and A/C compressor
The other option is to remove the serpentine belt. To remove the passenger-side mount, you must first remove the two bolts that secure the alternator. You don’t need to unplug the alternator; slide it out of the way, and you can pull out the mount. Remove the three bolts holding the A/C compressor in place to get the A/C compressor out of the way. You don’t need to remove the A/C or unplug it. Check out the article on how to remove alternators.
Remove the 16 mm top bolt.
Remove the top bolt using the Mercedes-Benz offset engine mount tool that we mentioned earlier.
Support the engine and lift it one inch.
Support the engine under the oil pan, with a wide block of wood between the jack saddle and the pan. Never let the jack bear directly on the pan. Many of these engines use a cast aluminum oil pan, which does not tolerate a point load and can distort or crack under the jack. Confirm that the jack is square under the block and that nothing can shift before you take any weight on it, and keep yourself out from under the engine while it is held up by a jack. Since you have removed the bolt on top of the engine mount, you can lift the engine about one inch. Raise the engine only enough to remove the mount, while checking that hoses, wiring, exhaust components, and other attached parts are not stretched or damaged.
Remove the bottom bolt
Remove the bolt at the bottom of the engine mount. This is typically a 13 mm fastener on the illustrated application that should break loose fairly easily. Remove the engine mounts.
Remove the engine mount.
If you remove the exhaust, you will remove the mounts from underneath. If you loosen the A/C compressor and the alternator and move them out of the way, you will lift the mount out upward through the engine bay instead.
Install new mounts
Install the new mount. Make sure that you position the heat shield correctly. There is a lock pin that you cannot miss, which needs to align properly for the heat shield and bolt to be installed correctly.
You are done. Congratulations!
Related How-To Repair Videos
MB E320 2003 Engine mount replacement
How to replace Mercedes Engine Mount W208 W210 W203
Mercedes Benz C240 Replacing Motor Mount
Engine Mount Guides and Owner Discussions on Other Sites
Here is a list of related how-to articles. The instructions are similar for all the different Mercedes-Benz models. Replacing the motor mounts on a Mercedes-Benz is the hardest part of getting them out.
- Engine Mount Replacement
- : Change engine mounts
- Motor Mounts install w/ Pics *first timer, DIY style
- DIY: Motor mounts on V12 SL models
- PHOTO DIY-ENGINE MOUNT REPLACEMENTS
- DIY – Engine mounts replacement for post-facelift R170
- How to Replace Mercedes-Benz ML GL Engine Mount
Torque Specifications
- Exhaust Manifold Front Flange – 20 Nm
- Bolt between the engine mount and engine support – 55 Nm
- Bottom Bolt between the engine and the axle carrier – 35Nm
Mercedes-Benz procedures can specify different torque values and torque-angle steps, and some bolts are designated for one-time use. Please verify before torquing
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 |
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 |
Has the check engine light appeared on the dashboard of your Mercedes? Use the YOUCANIC scanner to read and clear fault codes like a pro! The YOUCANIC scanner can read codes in many systems in your car, helping you get your vehicle back up and running again.
Before you buy parts, scan every control module, not just the engine. It shows the root fault behind the warning lights and tells you whether the problem is still active. See how to do a full health check.
