Hey guys I have a 1985 Mercedes 300sd that I just bought, engine sounds perfect and has very good power with 285k miles. I'm having an issue were the car makes a horrible clunking sound when its downshifting to 1st gear, and also when it shifts from 2 to 3rd clunks but not as bad. At first I thought it was the transmission but It seems to me like the clunking is coming from the rear. Also when i'm driving on the freeway there is a vibration at high speeds starting at 50mph, even my steering wheel shakes pretty badly. Another funny thing (aside) is that when I hit 15-20mph there is some sort of funky wobble on the car...but maybe thats just alignment issues? Anyways if someone can point me in the right direction on what might be the cause of this clunking....I'll be eternally grateful !!