i have an AVIC sat nav double din in mine and it had the VW MFD in when i got the car, i left the VW aerial in but the plug at the stereo end on the vag unit was at a 90 degree angle whereas the new pioneer one was straight, mine was supplied with a gps antenna as should yours be but if not they don't cost that much, mine said to mount in facing the sky on the dash, it had a magnet on it so i fitted in to the right of the interior light upside down magnetised to the roof (under the head lining obv)