While looking for alternatives to the OEM MB ATF for my 99 C280 I found these nuggets.

Looks like perhaps(could be dead wrong too ) MB's proprietary ATF could just be just very good quality synthetic Dexron III afterall.

TITAN ATF 3353
Multifunctional DEXRON III-Generation-ATF for automatic transmissions as well as any other ATF-applications. Developed for the latest generation of Mercedes-Benz 7-step-automatic transmissions (NAG 2), applicable as well for the predecessing 5-step-automatic transmissions (NAG 1). Offers fuel-efficiency potential.

DEXRON III
MB 236.12
VW TL 52162


http://www.fuchs-europe.de/1712.html

http://www.whnet.com/4x4/pix/ATF.jpg


It does seem a bit thinner than your normal run of mill ATF viscosity(6cst vs 7cst)however.

Looks Mobil 1 ATF could be a viable option for my 60K service around the corner.