When was the last time you had a service done on your tranny? If you haven't had that done for a while I would take it to a reliable MB shop and have the thing serviced including flushing and then add BG ATC (automatic transmission conditioner). This should take care of most of your problem since it is very possible that the screens in there are caked-up with clutch debris.

Husky898
'93 300CE 156K