[Tubers]

Given the difficulty in finding DIY information on this, I'll document this as best I can for the forum.

Thank you Jack! I replaced mine a few months back, just cannot seem to find enough time for the documentation part (pics, details, etc.)

My lessons learned (2008 S550 2WD);

*** These mounts are full of liquid, when removing them keep your face out from under them or you will get 'moisturized'!
- I used the Harbor Freight engine support bar, not a professional quality tool but it works, just take care where you set the feet. (https://www.harborfreight.com/1000-lb-capacity-engine-support-bar-96524.html)
- The drivers' (Left in the US) side mount can be removed from the front, just need to use a pry bar to wedge the engine over toward the passenger's side.
- The passenger's side mount is much more easily removed toward the rear if you detach the sway bar mount at the body frame and swivel the sway bar down
- This is the first Mercedes I've owned where the mount tool seems to actually make a difference. (Example of the tool here -- not my listing, just an example. https://www.amazon.com/Mercedes-Offset-Engine-Mount-Wrench/dp/B019L7IDU6)
- Tap out the holes in the new mounts with the correct thread prior to installing them. I had one that was burred a bit and it took me an hour of fiddling with trying to get the top bolt in before I figured it out. I removed it, tapped it and had it back in the car and bolted in place within 10min.

 

[Tubers]

No I did not. That is only required if you remove the drivers' side mount rearward. It just seemed like I would not be able to get my hands/tools up in there to do it correctly, so I opted for the forward exit method.

 

[Tubers]

I'm happy to report that I replaced both motor mounts and my transmission mount today. :beerchugr:

Awesome!!! It does make an amazing difference. :beerchugr:

 

[Tubers]

When I replaced mine, now and in the past, I've just used a piece of 3/4" plywood roughly the same size as the transmission pan to distribute the weight. You only need to raise the transmission 10mm, just enough to get the old mount out and new mount in. Now, this is from my non-4MATIC experience, not sure how that might change things.

 

[Tubers]

It's about 2h for me at home with the lift. 8hrs ... something went wrong. Wrong tools, wrong approach, wrong something. NOW, 4MATIC I understand is much more involved.

 

[Tubers]

Nonsense, just follow the WIS procedure. My experience with these youtube "how to's" is that they either don't have access to the official WIS procedures and just don't follow them resulting in the removal of things you don't need to.

Have to say, sometimes the WIS seems to have you doing unnecessary work ... until you actually do the work and realize it's the fastest, most-reliable way to get the job done. An example would draining the coolant and removing the upper radiator hose and fan to remove the alternator. The same thing with torque specs. If you follow them things are much more predictable and you won't go repairing the same problem twice.