David,

Jobs don't come much simpler.

I would think you have a limited slip rear diff, especially since Steve stated you need GL5. Stop by the parts house and look at their gear oils, see if you can find what Steve recommends.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.