504mbam

Im going to look at this 2000 c230 KOMPRESSOR it's a one owner vehicle the owner said the only thing wrong with it is the bottom motor mount which is causing a vibration is this a costly repair i would like to know what i am getting into before i buy the car

ptcruiser

No, it's not costly. You can buy the mounts on Ebay, and they are available with the tranny mount as well. A package deal.
There are several YouTube videos showing how to replace them.