My current B5 is a 1998. It has the standard Audio radio with active rear speakers. Can anyone tell me which fuse(s) is for the radio and the rear speaker amp please? The owners manual lists: 37 - Telephone (D-net), radio ...... 20 amp 43 - S-contact (central locking, radio, navigation system)........ 5 amp I have checked the car and only the 20 amp fuse at 37 is present. There is no fuse at 43. My car has central locking and a radio but no navigation system? So it seems this fuse is for both combined? 20 amp seem a bit high purely for a radio/tape unit? But when I remove it the radio does not work and I can only assume the rear amp is deactivated too. Basically I am looking to replace the rear amp (and speakers) and could do with knowing what size amp/wattage the factory wiring would take. I have an old school Pioneer GM620 amp which I think was fused with a 4a fuse and only rated at 2x17w(35w max) so was thinking of trying this or something similar. Stu.