My girlfriends '87 560SL has developed a differential noise. It is a low wurring noise. A shop says it is the differential. I have located a new differential that I can obtain for 400. It had written on the top of it with white marker "stock 560SEC. This differential looks exactly the same on the outside. There is a number on the right hand side of the back cover that reads R1263510908GEGE on our existing unit, and the same number is on the new unit in the same place, with the exception of the GEGE at the end. There is another set of numbers on the rear of the case, bottom right, next to the cover, sort of on an angle. The existing reads 672795 2.47, and the new one is 0906499 2.47. My question is are these differentials interchangeable?? I'd hate to change this out and find out that they are not. Also is 400. a reasonable price to pay for an NOS differential.

I have also come accross another one, new in the box, that I can purchase for the same amount. It is for a different model. number on the box is 201 350 1003. On the case itself it is AMG 705364656/0036 20/90 ACHSGEH3,27ABS 201.034 A1350. Any one out there know what model this would fit.

Your help is much appreciated

Rod