It's funny what you come across "surfin the net" Found this web site forum on MERCEDES commercials which has a huge collection of downloadable/viewable? pdf's for the W163 SUV Hope they're of some use to w163 owners ;) http://www.pointedthree.com/disc/forums/showthread.php?tid=1507&start=1
ps...
Came across this forum by chance. Think its relatively new? Had a brief look at their forums. Seem quite good. The w210 section has a good post with a selection of how to's for example. http://www.pointedthree.com/