Searched the interwebs and couldn't find a solution. The dimming function of the rear view mirror on my car doesn't seem to be working anymore. I've tried turning it off and wiping both the front and rear sensors but to no avail. The car's only just turned two years old, so is still under warranty. It's due for a service, so I can ask the dealer to look at it when it goes in, but just wondering if anyone had heard of this before and if there was a quick fix.