And don't just have any old mechanic check it out. Have a MB mechanic, dealer or trusted independant, do a PPI. That might just give you some bargaining power before the deal is over too, at the very least it will help ease your mind.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.