Wired remote interface for VW / AUDI / SEAT / SKODA

Interface to be used for VAG cars equipped with CAN-bus system :
* VW : Golf-5, Touran, Eos, Passat, Jetta, Polo, Fox, Caddy
* SEAT : Altea, Toledo, Leon
* SKODA : Octavia-II, Roomster
* AUDI : A3, A4

Interface provides speedpulse, reverse gear and illumination signals