Dear MB Doc
I have this new "buzzing vibration" in the gas pedal, it comes on after driving a bit, if I place the transmission in neutral the vibration ends immediately. This is a new phenomenon that came about after having the transmission worked on a few weeks ago. Reverse had quit working, I took her in to have a "reverse clutch" repair, it worked, saving me much money, but resulted in this new vibration. I also had the rear hydralic automatic levelers rebuilt, and new engine mounts installed. She's a very nice 91 560SEL 126. I also now hear a faint clicking sound when backing up. I'm sondering if I still have the same transmission or if it got swapped for another one, one with this vibration, and clicking sound, any ideas?
Thanks!

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Todd