bugeater12az

I want to upgrade to satellite radio but do not want to go after market the 2010 ML350 I purchased does not have have the soft key on the receiver unit.

I want to know if I purchase the satellite receiver will it work with my receiver unit or will I need to swap out the receiver unit and purchase the following:

new receiver unit, satellite receiver, fiber optic harness and satellite antenna?

I went to my local MB dealer and they didn't know what i needed to do.