turn on the ignition - pull every fuse in turn until the light goes out but its easier just to take the bulb out as the fuse may also be for other electrical items.
If your interior lights are dimming, either your battery or starter could be failing. You should have your car checked.
pretty easy really, make sure your interior lights are not turned on. Your headlights control should also be the interior light controller. Turn it clockwise or counterclockwise to turn your interior lights off. You'll run your battery down if you dont
If your interior lights won't turn off, you need to make sure you do not have a door open. You should also make sure the trunk of your vehicle is shut also.
If the interior lights in a vehicle will not go off, first one should make sure all doors are closed. Then one should find the switch on the roof of the vehicle and make sure it is not turned to the on position.
On your light switch there is a dimmer for the dash lights . if you turn it all the way to the left your interior lights should come on , turn it to the left and see if that works otherwise it might be a door switch .
pinch the lens side to side and it should come out.
You should locate the fuse box in your A8 to see if the fuse for the lights is burned out, and if that doesn't work, then you should replace the bulbs that don't work in the car.
should be with the head lights as an alternate switch or in combination with headlights, move switches in different combinations to see if you can get them to turn off
Pull the E-Brake up one click and the lights should turn off.
There is a dashboard illumination switch that controls the brightness. If it is pushed up fully, the interior lights will stay on. Lower the switch slightly until the interior lights go off. When doors are closed, if the switch is lowered, the lights should go off after about 30 seconds max, maybe less. Hope this Helps, it did on mine.
Should be in the main fuse block. Look for a fuse labeled "courtesy".
Check your alternator it could be malfunctioning. Sometimes it gives you warnings like this.