FYI in regard to $ help.....I think MB will contribute to the repairs on cars with less than 100K and I think may cover the complete repair if the car has under 60K and you have proof that the car has been maintained (dealer records would help I think)
On the MB warranty cars(original and starmarked) the usual fix was a new shortblock...cost around 9K I think

I know of someone in Texas that had less that 70K and complete MB dealer records.MB cover his entire bill on a 1993 vehicle and another gentleman on the east coast that had a complete longblock and turbo replacement....cost around 13K...MB covered 50%...as I recall the car has 75K

Warren
1992 300SD
Columbus Ohio