I've got a late 2000 P38 with factory fitted sat Nav. The system works fine with maps loading correctly and all functions working well except for the GPS input. It always defaults me 100 miles away. If I go into the 'hidden menu' by selecting settings and then holding the menu button down for 10 seconds my sensor check indicates 0 satelites and reception interference. Has anyone experienced this before. I believe the GPS sensor is in the scuttle panel, but where does this then feed into? The GPS screen or the CD unit in the boot? Are there any other parts or just these three main components? Any help would be appreciated.