I've got a VW Bury touch phone car kit fitted and the control box started playing up. If you tapped it with a blunt instrument it would work for a while and then go off. Bought another unit off a well known auction site and this powers up but I'm getting an error "wrong display".
Control unit is number
000.051.473.C and screen is 000.051.473.A
Is this because they are different numbers,and if so can I update them to make them compatible, or if I buy a new screen with same number as control unit should they work ?

Thanks in advance.