Haven't got to the bottom of it yet, Iv fitted a new heater element in that breather pipe as mine was pretty oiled up and the contacts were a little oiled up too, made no difference though! I did however try my mates cam solenoid from his polo gti, (same part number to the loops.) the one on the drivers side of the cam cover, took it for a spin down the road and no light! I'll need to do a longer test on it though as my one, when fitted again, didn't throw the light back on till further along the road than I went! ill keep y'all updated though!