I am about to do an oil change on my Mercedes 722.6 auto box as fitted to the 4.0 SC 'R's and have been doing some research on the net and came across this very useful post on the BenzWorld forum, which was posted by loubapache: Mercedes-Benz 722.6 Transmission FAQ - Mercedes-Benz Forum

I have found it very useful and hopefully others on this site will benefit from it as well.

Andy.

P.S. I hope I haven't broken any 'forum protocol' rules by posting this link from another site!