I had written in the wrong forum.

Can someone please tell me the difference between the services on my car. They are called A, B, and C?

I have changed oil. oilfilter, airfilter, carbon cabinfilter and dieselfilter now.

What do I change for the different services?

Thanks in advance.

The Maintenance Manual for your vehicle will tell you. If you do not have it you can get it here: https://www.mbusa.com/mercedes/servi...enance_manuals