I had my motor mounts replaced at around 80k miles with Genuine Mercedes mounts. I've got 100k miles on the car now and I've started to hear the same resonating noise in the drivetrain as before the mounts were changed.
I was wondering how many miles are y'all typically getting out of your mounts. I did have the tranny mount replaced at the same time. The noise and a clunk sound on a cold start are my only symptoms. I don't feel any vibration when at a light or stopped with it in gear.