Mine has a little hitch that I have asked about in the past. I live with it..and have for 7 years or so. Had a dealer switch out my fuel distributor with one from a 2.6 190E. Told me the problem was cured, but I would need a new fuel didstributor. Wasn't solved and I'm still running with the swapped out FD. Seven years later.

FYI....

http://www.peachparts.com/shopforum/showpost.php?p=1462293&postcount=19

http://www.peachparts.com/shopforum/showpost.php?p=2075981&postcount=1