A few years ago MB produced this DVD which contains all of the maintenance and repair procedures for all W210s. It also includes TSBs, a Star parts finder, PDFs of all owners manuals, wiring diagrams, etc.
Recently, the MB Classic Center in Irvine, CA obtained some (left-overs?). The price is $25 + shipping & tax?. Originally, the price was $150 and that was a good deal.
Mercedes-Benz Classic Home - Classic - Classic Center USA
Contact Tom or Woody
Note: Windows only. Some people have had problems with some Windows OSs but my old copy (+3 years) works fine on Windows 7.