Did a search trying to answer this but couldnt find anything usefull. I am trying to retrofit front foglights to my DTM and went to try the install tonight. I have got a genuine loom and a new headlight switch with the auto function and both front and rear fog positions part number- 8E0941531b (DTM switch only has rear posistion on the switch). I fitted the loom and the new switch and turned the car on two clicks on the key and the main beam came on straight away even though the switch was in the 'O' posistion and stayed on untill I removed the key. When the switch is in the auto posistion the headlights came on (was dark at this point) and went off when the key was turned to the posistion where you can remove it as it should. When the switch is turned to the sidelight posistion the main beam stays on and the symbol on the switch stayes red. When the switch is in the main beam position the main beam is on but the dis throws up a numberplate bulb out warning (both bulbs are on though). The fogs work both front and rear as they should do with the switch in each position. When I refitted my original headlight switch all went back to working as it should with the exception of the front fogs came on as well as the rears when the switch was pulled out to the rear fog posistion. I tried coding the 'Fog Light Cold Diagnosis' to '0' in channel 16 in central electrics using VCDS but it didnt change anything. So my question is does anyone have a wiring diagram for this new switch or the plug that goes into it, or can show me pics of how their switch is wired? Any help would be greatly appreciated.