hello all,

i am new to this site and am the new owner of the dreaded 1993 300sd...

purchased it online from a dealer...it is a pristine 1 owner car w/112,000 miles...not much problem w/oil consumption (1/3 quart per 600 miles)

i have had it for just a few days and put 600 miles on it to see how the oil consumption was and also to feel it out...it was described as perfect in every way and it is except for what i consider a major annoyance and problem...

***when driving between 45MPH and 60MPH there is a vibration felt and seems to be comming from the rear of the car...over 60 and under 45 smooth as silk...

i had new tires put on the car and they were balanced...
....took the car to my shop (reputable mercedes repair facility)and they noticed both engine mounts are broken...my mechanic took it out on the freeway and feels the vibration problem is the drive shaft not in balance or the rear U joints....he didn't think the mounts were the reason for the vibration at the 45-60 mark but wasn't certain...obviously to make certain the engine mounts need replacing...he also inspected the drive shaft at both ends where they connect and didn't notice or feel any slop or paly at the connections..

since i am in negotiations with the seller to try and recover some money from the misrepresentation, i was wondering if anyone could please expand on possible causes or has anyone had a similar vibration experience..

regards,
jim in calif...