The manual for which series? I have MB CD manuals for the 124 and 126 series and they run on XP. The manuals are just pdf files containing terrible scans of hardcopy manuals bundled with some index pages. Someone on this forum recently offered a more useful index that you can use instead of the one MB provides.

Worst case you can set XP to run the CD manual program in Windows 2000 mode. Something like right click -> properties -> compatibility...

Sixto
95 S420
87 300SDL