I want to install an alpine headunit into my 6n2 but the vagcom i have says it cannot be used with aftermarket headunits, anyone know why this is?
i read somewhere(can't remember exactly where to) that garages also refuse to do diagnostics if an aftermarket headunit is fitted
I think the instructions say it's due to the voltage of the headunit? im not to sure though ill have to check
any replies would be grateful
thanks

