You people have saved me a load of money, and I'm hoping you can again. I have a 91 300CE. It runs great, but when started from cold it rumbles like a bad diesel. This rumble only seems to happen when its in D or R with my foot on the brake. If I put the gearbox to P or N, it doesnt happen, or if I apply some throttle, it doesnt either. Also, when I brake hard, the gear selector seems to rock backward about 1/2 inch. Is this normal? Is this most likely an engine problem, or a tranny problem? Or just a simple mounting? Any help would be appreciated.

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Brian Drought
1991 300CE
http://www.users.globalnet.co.uk/~drought/

I will say you need new motor mounts & check
the transmission mount too.
check transmission rod bushings.

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MB STARS Master Guild Technician,12 years MB tech
5 years independent shop owner

The engine mounts are faulty when the base is less than or euqal to 13mm from the frame.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

Thanks for both your answers... I will go check the mounts later. At the moment its not too bad since it goes away after 5 mins of running... I assume the mounts are just transmitting startup vibration... possibly goes to show the engine is running smooth one warm I guess. ;-)

Thanks,