CLS55 Differential oil change and M113.K Supercharger oil change - or sealed for life?

[philnewmerc]

Mercedes say the supercharger and rear diff are sealed for life. I have read a lot about jet oil (that people use for superchargers) and it sounds like it will last an awful long time in this application and the risk of tampering exceeds the small risk of not changing. Not sure about the diff, that sounds like a high stress item?
Cheers

 

[Teego]

I had my diff oil changed at same time as atf. Seemed sensible and not expensive at my indie. I'd like to change sc oil but haven't got around to it. Looks easy. Jet engine oil isn't cheap though.