No manual.

I'm not familiar with your Mercedes but the people at Benzworld may be able to help with your question. http://www.benzworld.org/forums/ If you have an S420, that would be the W140 chassis (known internally as the 140) http://www.benzworld.org/forums/w140-s-class/ They seem to have a stickied post at the top containing user manuals. You'll need to copy/paste that second link for it to work properly. Hope this helps!

Did u figure it out bcs I have a e430 and I can't either how funny but annoying