I have an 1983 300d turbo it runs great.. I've put alot of work into it and I'm starting to get boggled so I would love it if someone would help me with some clarity.. I think a fresh perspective always helps.. So here's my deliema I have been noticing a vibration on the passangers side of the car or mid center I realy can not pin point it but it occurs at different speeds not just one in particular but I did notice between 60 and 70 it gets pretty bad then I let off the peddle and back off and it goes away the rest of the drive.. I've just had a couple of new tires put on today to see if if was something with the tires I also and the ball joints redone and the brakes so I kinda don't think its the front end. But who knows as anyone ever seen this before? and if so what was the remedy.

 

I had a vibration from underneath my merc soon after I got it, sounded/felt quite bad, although this was on the drivers side.

I had a garage check it out and they found it to be a missing bolt from underneath making it vibrate. A simple solution, howerve a very expensive bolt £60!! Only becasue they had to find it, look at the ECU etc.

Just an idea.