Originally posted by TROVERMAN
Then when I went to pass someone on the road it wouldn't go above that mark either.
That's not normal. Most later MB's have a rev limiter to keep you from over-revving the engine while in neutral (or park) but the limiter is not engaged during normal driving. You do have a rev limiter at, or just past, the redline mark for the engine rpm. Is the problem persisting? I also fail to see the need to exceed 4000rpm while sitting still.