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Old 09-12-2005, 10:53 PM
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mj_sid mj_sid is offline
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Join Date: Mar 2003
Location: San Jose CA
Posts: 146
300D Heavy Thumping Vibration on Acceleration

Hello All,
I have a 1985 300D Euro. When I accelerate from a dead stop the _______ (drive line???) makes a very heavy thumping vibration. It only does it when you accelerate from about 5-15 MPH and only from a dead (or really close to dead) stop. It seems to do this from all dead stop accelerations and is worse in the morning. In the morning if I get up to speed then remove the foot from the accelerator for a second it seems to stop it most times.
I've read through some of the posts and I'm hearing all sorts of things that could be wrong. I think the leading two are the Tranny Mount being bad or the Driveshaft center bushing/bearing.

Thank you for any imput,
Matt
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KI6CCA

Current Stable:
1987 300SDL
1980 450SEL

Out to Pasture:
1982 300D KIA (Rice Rocket vs. 123: He hit me at 80-100MPH I walked away he went to the hospital. Sounds fair to me!)
1985 300D EURO Scrapped (got more money from state than car was worth)
1979 & 1980 300SD Great Cars!
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