The factory DVD is NLA; it was priced at about $200, I think. You can occasionally find them on eBay, that's where I got mine. Some of the things the DVD can do are linked to a Mercedes web site; it's possible that a copied DVD might not work correctly. The factory DVD does appear to have some copy protection but as I am not an expert I do not know how sophisticated it is. I have not seen any aftermarket manuals for the 210.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970