Does anyone know if the differential is different for a 300E 4matic from the non-4matic version? I think the back end on a 4matic is pretty much the same as in a non-4matic, but need to know about the diff., specifically.

I have a squealing diff in my 4matic and want to know if I must specify that it's 4matic in sourcing a new (or replacement) one. (I tried the heavier oil, but it was only a limited help.)

Thanks, in advance.

CB