I was surfing along and found an excellent write up with great pics for the ATF old change (no lifetime fill flame wars plz) on the 722.6.
The member "G AMG" did a fine job with this DIY. Highly recommended.
I am at 95k and going to do mine next week when I get the parts (including the overpriced $40 dipstick tool just to be safe).
http://www.benzworld.org/forums/w210-e-class/1334827-photo-diy-722-6x-transmission-fluid.html
I have a copy of a .pdf someone did using "G AMG"s pics. File size is too big to upload here. If you go thru the thread, you will find it.
Uploaded are the first 5 pics of the job. There are 20 pics total.
I will post how mine goes.
Bravo G AMG.
Cheers,
Dickie
00 ML320
06 325i