I was behind a new A4 on the way to work yesterday and my V1 was going gonzo. 3, 4, or 5 bogeys, arrows moving all over the place. I soon realized it was the car in front of me somehow causing it. When they turned, the V1 started to settle down and finally shut up.
Do A4's have some adaptive cruise, rear view something or other that would cause this? I've never had it happen before yesterday. Or was it something they had in/on the car and not specifically the car?