NHTSA Complaint #11614483 — 2022 AUDI Q7

I drove on [XXX] from Los Angeles towards San Diego in the morning. I followed the traffic in the middle lane and turned on the ACC, including the lane-keep assist, at the same time. The speed was set at 78 mph, but the traffic was moving faster than that. The distance was set to level 3 for ACC auto brake. After passing a speed limit sign, the head-up display suddenly showed a speed limit warning light, and at the same time, the vehicle suddenly braked and reduced speed to 65 mph. The vehicle behind me almost crashed into me. The ACC didn’t behave the same way as in the past, and I didn’t receive any notice from the dealer or manufacturer about this significant change. This could definitely be a major problem when using ACC in traffic. For example, if the traffic is moving at 80 mph and you set ACC at 80mph, when pass a 55 mph speed limit sign, the vehicle will quickly reduce speed to 55 mph, which could cause a serious problem for the cars behind. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)