I was at the Benz dealer inquiring about ATF... He asked what car I had and I told him, and he said for my older Benz (I guess he means "traditional" 4 speeds) and he said just plain Dexron III. He kinda leaned over the counter a little bit and told me, "Just go down the street to O'Reilly's and get their brand for $1.19/qt....that's where we get ours!" So the Benz dealer themselves use generic brand Dexron III! I suppose it wouldn't hurt to use something more exotic, but you probably won't see any difference and probably just end up wasting your money. Just my humble opinion
'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.
"A Mercedes-Benz is like a fine wine, it only gets better with age."