Hi Everyone

OP here. Thanks for the responses and so to followup,

The mechanic (an independant mercedes specialist) rebuilt the entire rear brakes assemblies about two weeks ago.
The rear psitons were frozen in the calipers and the parking brake assembly was not working too well.
The problem I described above was there before and after the brake job, so Im pretty sure its not brake related.

Regarding the engine mounts, I had no idea there was an adjustment for the engine mount. Cant imagine what could be adjusted.
I put those in myself and its all torqued down and then double and triple checked.
I will try to see if one of the new mounts is defective by seeing if I can get the engine to move around under load.


Still wondering if it can somehow be the rear diff mount or the subframe rubber peices. I dont know how to test for that.

Thanks for the ideas so far.

Curt