Reverse Light left bulb
 

I've got a 2006 A3.

Dashboard tells me reverse left light bulb is out..
I looked at the bulb and it looks fine by looking at it.. I will try replacing it all the same but, could it be that this is something else? Could it be a fuse, and if yes, which number?

This left reverse light has been going on and off several times, but this time it is not going back on..

loose connection?