The MB ATF fluid is probably full synthetic and is for the new cars. Your car can use regualr ATF or you can buy Mobil 1 ATF. There are about 13 "approved" ATFs, for use in Mercedes. Personally, I put in Mobil 1 ATF and Mobil 1 gear oil for the rear diff. I figure since these fluids only get changed every 30K, I figured what the hell.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section