My 1985 Mercedes 300D shudders at high speed, about 90 mph. I rarely drive faster than 65 since I'm over 40 now, but the other day I came to the aid of someone in a bad situation and had to drive at very high speed.

The shuddering reminded me of my teenage days when i tried to get high performance out of tiny imports and at high speed they werent too stable.

I know I wont have to drive at 90 mph that much, but shaking does make me wonder and I want to fix it.





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