Date registered: Dec 2005
Vehicle: 222.132 & 221.122 & 213.050 & 906.633
Mentioned: 3 Post(s)
Quoted: 40 Post(s)
If I understand right, the rear differential casing has a rubber bung and that has come off? It sounds like a difficult case because MB could always claim that you have hit some object (when reversing) and that has caused the rubber bung come off. I guess your casing is clear from any hits, you could always claim that there should be some scratches visible.
I've never worked on a Sprinter, if I've figured out the part correctly, it looks a bit odd if the plug or flap is rubber, are you talking about the part at the back of the rear differential, vertically about in the middle?