MB now has an online parts catalog that details pricing and availability for parts for classic models.
This is a complementary reference for the ISPPI / EPC.
Link:
classicparts.mbusa.com
Here's a sample page, that details the exhaust component availability for the E500E:

This is a complementary reference for the ISPPI / EPC.
Link:
Mercedes-Benz Classic Center USA - Official Online Parts Store | Mercedes-Benz Classic USA Parts Store
Official online store for Mercedes-Benz USA's OEM parts & accessories catalog for classic vehicles made between 1954-2006. Order & pay online to get replacement parts shipped directly to your door.
Here's a sample page, that details the exhaust component availability for the E500E:
