Here are a couple of links to good Info on the W211. They require a broadband connection to work correctly.

The first is a link to an interactive Owner's Manual for the W211. This is for the British version.

http://www.mercedes-benz.com/omb/e/cars/e-class-t/betriebsanleitung/flash5.html

The second is to a MBUSA Sales Learning course for the W211

http://www.mbusalearning.com/w211elearning/index2.htm