I would like to know if anyone can get me the part numbers off of there rear diff. Hopefully, I can cross reference it to Mercedes and see what other gear ratio's are avalible for these cars...mabey some a slow as 3.68. Look for a number 10 or 12 digit's long that may start with a 210, 211, 220, 124, or 203. The number could also be broken up like this: xxx xxx xx xx . Thanks.