I have a new problem with our '88 190e. The tranny fluid seems to be disappearing. It has about 185k on it but the odd thing is that there is no trace of leaking fluid. It is a little wet underneath the tranny but there is never a puddle or so much as a drop of fluid under the car. It's going through a quart every 100 miles or so which is a pretty heavy leak I think. It shifts fine when the level is up. Anyone have any tips or tricks? Even suggestions?