CG 270cdi

Is there any publicly available source that we can use to find the part numbers or the replacement part numbers for our MB cars?

Online ideally.

Is there a store with this information on their site? I have seen diagrams on occasional sites but... Do you have any suggestions?

Plutoe

Yes, it's called startekinfo.com EPC----however if you are down and out---go to oe discount parts.com open source diagrams and parts