I did some bad cutting and pasting in the previous iteration of this and parts of it made no sense. So here is the correct version.

Regarding this photo from a PelicanParts W211 Transmission mount DIY:



1.) Is removing the two nuts (green arrows) necessary to drop the mounting bracket? They don't seem to be attached to the bracket.

2.) What does the bolt at the red arrow do -- or what is it attached to? Mine is rusted to its backing nut and both spin freely, in unison. I can wiggle the bracket side to side a bit but it will not come off. I could feel the top of it when I maneuvered my fingers up the and turned from below; but it seems the same length as those other 6 that were successfully removed.

This was a show stopper for me and what should have been a simple repair was screwed up by... a screw.

I am doing this replacement due to some some strong vibrations in Drive and Reverse, with foot on brake. Car is dead quiet in Neutral but curiously vibrates a little in Park. In park, if I put my hand on the engine cover, I can can also really feel strong vibrations.

These vibrations were present for some time but became stronger after having my axles replaced last Friday so I am guessing transmission movement during the repair impacted the trans mount.

**I replaced the engine mounts today with new Lemfoerders, so they are not the cause.***
(Engine mounts are shockingly easy to do on this car; took me longer to remove/reattach the belly pans than it did to swap out the mounts, so why are shops quoting 6+ hours and $1200+ for this job? Hmm.....)

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2008 E350 4matic / Black/Anthracite

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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black