Does anyone know what the proper type of ATF is for use in an '85 (german spec.) 500SEL's transmission? The previous owner has been using Dexron/Mercon III.

The car has long had a small ATF leak from the transmission's front seal area.

Ben Gilbert

That's the right stuff. Actually it's Dexron III/Mercon.

Sixto
95 S420
87 300SDL

Thanks for the information.

I wonder if some of the new ATF formulations that promise to reduce leakage would work? I have been hesitant to try them fearing it might make the problem worse. Any thoughts on this?

Ben Gilbert

Do a search on Trans-X and Lucas transmission additives.

Sixto
95 S420
87 300SDL