Hi
Can anyone help me, i have just bought a command navigation unit from ebay for a C Class and cannot source a gps antenna for it. It is a hrs connection does anyone have a parts number for it as mercedes are useless they need a chassis number which i dont have as i bought it from ebay. the map is working and the addresses but no gps. Does anyone know if it will work when i get an aerial or will it needed coded from mercedes benz

Thanks