ucccontractors

i have a 2008 cl550 once i start the car the nav starts loading then it work for a while the command just dies out screen goes blank nothing works on the command not the sat the cd or any thing in the command the map frezze
i try to remove the fuse disconected the batt in the trunck still doing it turns on and of constantly any advice from your cl owner ? with the same problem
thanks
ROBERT