Is the All-Data a good thing for DIY servicer owner? I see it is 24.95 per year. Is that what you have, a yearly support type? I have needed a repair manual for several questions about interior trim removal , and will need it for routine service instructions.

I had the MD CD on my 300E, 87. (but it was not all that good), so was hesitating to call about the S420, 95 I have recently purchased.

Sorry I was no help on your seat part number question !

DanielW