2022 Audi Q7

My car has suddenly tried to stop in the middle of an interstate highway. It happens when the adaptive cruise control is active. Even though the lane in front of the car is clear, a warning sign appears in the dash that the pathway is obstructed and the car tries to stop quickly. This has happened on this vehicle four times now. It happened on my previous Audi as well. At that time, the car was taken off the highway and the dealer would not return it to me for a period of six weeks. During this last incident, the dealer said that they searched the information in the car. I had provided the odometer reading and date to the dealer when it happened. I was told that there was no information found about any malfunction. Of course the car thinks that there is an obstruction there in front of me and thinks it is properly functioning and now error message is created. This creates an extreme hazard for accident on a busy highway. It is a recurring problem and should be investigated. I have uploaded a picture of the error message displayed in the instrument cluster. This is not a trivial problem.

My wife was driving the car with the adaptive cruise control set at 72mph on 5/11/2025. The milage on the odometer was about 37165. A car was close behind when suddenly on of the systems in my car slammed on the brakes and attempted to stop the car. There were no warning indicators to suggest why this had happened. My last Audi, a 2020 A6, did this as well. It had a number of safety systems malfunctioning around the same time. At one time, I was told by the Audi dealer that the car was unsafe to be driven and it would not return the car to me. It was impounded for about six weeks as I recall. Whatever the reason, this is a serious safety issue when an vehicle suddenly tries to stop at that rate of speed on a highway with other vehicles on the road.

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)