Hi, guys,

Me again - sorry to bombard everyone with questions!

I always leave my headlights switched to "Auto". The headlights come on as required (so it seems the sensor is OK), but the green light on the instrument cluster doesn't come on; nor do any of the instrument lights (steering wheel; climatronic etc.). Also the Sat-Nav stays on its "day" setting, instead of switching to night. This has only started happening in the past week.

I was trying to trace a different fault to this in VCDS, but I may have inadvertently switched a setting which I can't recall. Alternatively, is it a fuse issue?

Any clues?

Many thanks.

Have you tried shutting the boot? ;)

Sorry no helpful suggestions

Update: What I thought was the lights coming on automatically was my mistake: it was just that PRLs were enabled. Now that I've disabled PRLs, the lights AREN'T coming on automatically, so it could be the sensor, I suppose. How would you test for that?

One other odd thing: if I hold the light switch in a position BETWEEN Auto and Side Lights, the headlights DO come on. This seems to point to a faulty switch in the dash.

Any thoughts, anyone?

Edited 6 October, 201213 yr by Ned Brickley

Holding it between the settings is probably causing the switch to think it is faulty, so the lights are coming on as failsafe.

To test the sensor, get something black and hold it over the light sensor. This is the rectangular black bit stuck to the inside of your windscreen behind the interior mirror. Make sure whatever you use is definitely light proof as some things look black but let a surprising amount of light through.