[dsraven]

the last euro car I worked on was an audi and it was the haz switch at fault. it is a stand alone switch in the middle of the dash with it's own indicator light. for a couple hundred bucks, a bunch of time wiring and some tylenol for your head after, you could have one too.
flashing signal indicators is the wat to go, haha
I remember helping my buddy with the same issue on his 54 but don't remember where the indicator lights actually ended up. possibly on the clamp on signal switch.