my healdights stay on whether i have them on auto or 0, the dimming mirror does not switch on too, i guess they are linked somehow. it seems to be a fault others have experienced but there are no answers on how to solve it? any one experienced this problem? its fault code 01800 - Light Switch (E1) i have read on audizine you can code the headlights for a region code ?? will that make a difference, anyone coded their headlights? i was just going to buy a new switch but on audizine people who experinced this fault said a new switch did not solve the problem? my car is audi s4 cab 2004 any help would be appreciated.