Well...

When I went to my dealer for ATF for my 95 E420, I got Quaker State Dexron III(H) in green bottles.

It wouldn't matter which MB dealer I went to in Canada - it's what they all use!

It's always worth checking with the dealer for this stuff, though - their price to me was cheaper than the jobber I was using, and the stock was fresher - the jobber didn't have H-spec fluid on the shelf.

Cheers
JJ