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Mercedes Comand system not working on 2005 CL500 Coupe - can I re-boot it? On starting the car, the Comand logo comes on the screen and the warning then appears followed by a frozen screen with the Bass, Treble etc options on the right hand side. The radio, NAV, Video buttons etc do not work. However, any audio traffic warnings do come on through the speakers. The battery has been disconnected weeks and the Comand system no longer works. However, I have often done this in the past without any problem - other than having to re-set the windows and sunroof.
I would love to have an answer, Alternatively if you don't have an expert who can answer the question, it would be useful if someone could recommend a reliable good value company that would be able to fix the problem