I know its been mentioned in the past, however I wanted to let everyone know you can get a free Mercedes-Benz EPC membership for US Spec Mercedes!
Well it's not toally free, they do charge .01 cent to authorize and confirm your identity, but thats not bad considering this EPC will give you part numbers for just about any part you need. I can also be helpful with the exploded views. The coverage doesnt just stop at the W126, it seems that ALL US Spec Mercedes are accessable with the VIN number. While I am on that topic, the VIN number is needed in order to search the EPC.
If only they listed a price with the part number that would be great. I have Mitchells on Demand so really I get a list price for just about any part for quoting purposes, but it would be nice to know what Mercedes thinks these parts are worth before the dealer gets their hands on them. Usually the dealer is charging upwards of 50-150% mark up. Closer to the 150% if you are not a repair shop.