Does anyone have a suggestion on 2014 Cc radio with maps and navigation that just stopped working. All I get is a repeating welcome to Volkswagen screen. Took it to the dealer and they charged me $100 to tell me the radio unit doesn’t work! Backup camera, phone, radio. Navigation, campus, etc. run through the unit. Any place to obtain a unit from a salvage yard? Dealer says can’t price one because WV in midst of changing part number. Thanks