I have an 83' 500sl. The car hasn't been driven much since I got it in January. However, although it took a minute or so to warm up after this period it would run great. Recently the car has been sitting about three weeks or so while I replace the interior. I took it out yesterday and noticed that from pulling out up to about 1700-1800 rpm I feel a kind of shake. Maybe a little rough running but once above 1800 rpm it runs fine and is very smooth. The idle really doesn't seem that rough and if you depress the accelerator while in park there is no hesitation. I read some of the post on rough idle. Does this car have the hydraulic motor mounts. Distributor and wires were all new when I got the car. It just seems kind of coincidental that this occurs since its been sitting.

Any ideas would be greatly appreciated.