I have the same problem on MK3 2004 (facelift). I just bought it and neither drivers nor passager seat is warming up. I havenīt mesured on the fuse, but does anyone know what wires are supply and heat control under tha seat? Or even better what wire is connected to the heating pads? I donīt want to mess with the airbags........ If I`ve got it right, there is a control module under the seats that digitally reads the value from the heat control unit, right?

Thanks all