Yes, MB discontinued the W210 DVD about 8(?) months ago. Shortly after a member on Benzworld had one up for sale for $50. I wish I had got it as a backup.

Most people who have purchased the CD's on eBay have complained about the quality and completeness.

There is the alldatadiy.com service which some people seem to like. And there are the DIY postings on this and other sites which contain almost everything you need to know to do routine maintenance and common repairs.

However there is still a Star Service Manual DVD for the W211. Part No. P-2700-211-07. Call 1-800-FOR MERCedes for pricing. The W210 one was $149+shipping+tax.

Here is a link to what is currently available from MB.
http://www.startekinfo.com/StarTek/outside/9124/?requestedDocId=9124


Good luck.