Controllers built after sometime in 2002 can be flash repriogrammed in the field as new software fixes become available. BMW has been doing this for years and GM has been doing it for even more years.
MB makes one buy a whole new controller to do the software fix. Many including some on this board have burned the new software fixes into the 36k chips that store the programming. This probably is not the kind on problem you are having with your co9ntroller. If its software needs fixing it is broken software I don't think there are any specific software fixes in your area.
Your controller is also married to DAS and can't be moved from car to car. If you get a junk yard controller rebuilders can repair that problem.
Bosch Master, ASE Master, L1
33 years MB technician