I posted 2 weeks ago about brake failure on my 1991 300d. Going towards a stop sign, I hit the brakes, and they were hard ... and weren't stopping me, much. I overshot the stop sign by 8 feet. I could have killed someone or even myself!

A mechanic replaced the power booster, thought that might be the problem. Then yesterday, same problem. Took it back to the mechanic, he thought maybe it was the hose that leads into the booster, and replaced that.

Someone posted to my previous thread that it could have been the vacuum pump. Where is that, how to fix, and is it fixable or just replace?

Thanks,

Jeff