B220, JG 2013, Update Naviger and Radio Conversion

Hello I bought in Nov. 2013 a B220 incl. navigator, which also includes radio and telephone. Mercedes can no longer offer an update of the navigation device due to the age. Furthermore, in Switzerland for some radio stations the VHF was switched off, so that these can only be heard via DAB. However, my navigator contains a radio device with VHF, FM etc and no DAB. My questions: is really so that I can no longer buy an update for my navigator or a new one Is it really the case that the adjustment would cost about 1’000.– in order to be able to listen to the radio stations switched to DAB again via FM? I live in the area of Lake Zurich. I am not interested in this kind of navigational device.