Thanks for the post
I'll have to do my sisters 00 E320 4MATIC soon
it has about 90k miles on it (same 722.6 Manumatic tranny)

First I had to get a handle on replacing one of the front differential axle seals properly. It kept dripping fluid after driving. I installed another one, hopefully it will hold up better. Been drip free the past few days, knock on wood.