Hi all,
I need advice/info on a weird vibration I felt while test driving a '99 E300 turbodiesel today. I have been looking for a car like this for a little while now and it has been hard to find one that really speaks to me.
I finally found one that came with no rust though it has been living on the northeast for the last 9 years so that speaks a lot about the care the car has received.
The interior is very nice and the exterior tho it needs a buff, it also is nice cosmetically speaking.
The mileage is the lowest I've seen so far for my area as well (just over 100K) and the tranny shifts nice and smooth (has not been serviced yet)
The one thing that is making me think twice is a vibration at low RPM's which coincidentally I felt on another 99 I test drove about a month back.
As you get on the gas at low rpm's the car develops a strong vibration that transfers to the body of the car, once you pass the rpm range in which the vibration occurs, it goes away completely and it is not felt at idle, in fact the motor idles very nice at around 600 or so RPM's.

My first thought was engine mounts but the owner says he had a mechanic check them and they were good. The mechanic suggested it has something to do with the idle???
I am no stranger to diesels but never owned a MB.
Car is very peppy and smooth otherwise.
I think the price is fair but I need to address this vibration or at least have a clue as far as what it could be or what to look for before I pull the trigger and end up kicking my self in the rear.

Any advise and help would be greatly appreciated.

I am very interested in this car because of actual miles, and the fact that there is no visible rust. I checked wheel wells, rockers, window frames (behind the weather strip) and found no rust at all.