Howdy, folks! I've got an '04 TT Quattro 1.8 that has been having some strange issues over the past couple of months, and I'm hoping maybe it sounds familiar to some of you because the shops that have looked at it have not been able to figure it out.

Basically the hazard lights and the dipped headlight error turn on and off intermittently (and independently of each other). There seems to be no particular trigger for it. I may be driving down the road and suddenly BEEEEEEEP, dipped headlight. Then it goes away. Then it comes back. Then it goes away. Rinse and repeat until I just decide to turn my headlights off.

I may be sitting at a red light and suddenly my hazards go off. Push the button, they go away. Few minutes later, there they go again.

The first shop I took it to replaced the hazard switch and the multifunction switch, but that didn't resolve the issue. In fact, they weren't even able to recreate the problem, so they basically threw parts at it and hoped that it worked. It didn't.

I then moved from Florida to California, and when I got here I took it to another shop. They also claimed to have not been able to recreate the problem (they were already fixing some other things with the car), but within FIVE MINUTES of me driving away from their shop...BEEEEEEEEP!! CLICK CLICK, CLICK CLICK.

So I took it back to them, and now they seem to think that it may be an issue with the anti-theft control module (part number 8N7962267F), but I have a hard time understanding how that could possibly be the case, and I'm not about to shell out a lot more money on something that isn't sure to fix the problem. Especially since this particular shop is being real wishy-washy about whether or not the part would be covered as a recall repair. Either the part has been recalled or it hasn't. Frankly I don't trust these people.

So before I go taking it to an actual Audi dealership (where I'm living now is temporary, and where I'll be moving to later this week there's a nearby dealership), I figured I'd put the question to you folks. Have you ever heard of this issue?

 

UPDATE: I did some digging around these forums and stumbled across this: https://www.audiworld.com/forums/a4-.../#post24718743

And whatdya know? That was exactly my problem. As long as the hazard light fuse was in place and my phone was hooked up to the cigarette lighter charger, I would get a headlight error. Unplug the phone, error goes away. Plug it back in, error comes back. Unplug the hazard fuze, no error. I never got the hazard lights to go off on their own, but it's easy to imagine that problem was related. So I'll not be using the charger anymore, and if the hazard lights go off on their own again, we'll attack that as a separate and unrelated issue.

 

You might try a different charger. Possibly the one you are using is creating some sort of electrical feedback.

 

I'll just do without for now. The radio I just installed has a USB cord coming off the back of it as well as a connector in the front. It's only 1 amp, not 2, and it's a little annoying that the radio automatically changes inputs when I plug my phone in, but it will be fine.