Vibrations with NEW engine mounts?
 

I recently changed my engine mounts. I haven't changed the transmission mount yet (plan to within a week or two).

I am somewhat concerned as here are my results:
-Idle became smooth, like the engine is off
-Below 4,000rpm it became smoother
-Above 4,000rpm it became rougher
-Vibrations are not felt equally in the car. In the front it is smoother than the rear.
-Vibrations are RPM dependent, NOT speed dependent.

Engine mounts used were febi/bilstein
Engine is a M111.960 (2.2). 62,000miles
I plan on doing the transmission mount and then maybe taking it to a mechanic. I doubt the transmission mount will have an effect as it got harsher in rpm ranges that it used to be smoother in.

Any help is greatly appreciated. I know this is a 4 cylinder engine, and I am unsure if I am just expecting too much, but it really doesn't seem like what a Mercedes should be like

Try loosening both engine mount to frame bolts a couple of turns, run the enigne for a few minutes and turn it off, then torque the engine mount to frame bolts to 30 ft/lbs. Replacing the transmission mount may help if it is worn out.

I expect that you removed both engine brackets in the process of replacing the engine mounts and torqued the engine mount to engine bracket bolts to 41 ft/lbs. Also, the engine mount alignment tab needs to fit in the slot in the engine bracket.

I didn't use a torque wrench for tightening them. I just did it by feel.
Yes I did align the slots correctly
No the brackets were not removed. The engine was lifted and dropped on new mounts