Turn signal relay switch
 

I have a 01 A6 and I am having problems with my turn signal not working. the turn signal works when I turn on the hazard lights and when the car is lock or unlocked. I have checked the fuse and replaced the turn signal stalk but I am still having the same problem. From what I read, it maybe the hazard light replay. Does any know where I could find a hazard light replay for sale? I have check online somewhat and can't seem to find the right part. Thanks

I got mine from an Audi dealership for about $40 and put it in in their parking lot. Just call the parts department of your closest dealership and pick it up ;)