While driving on a California freeway at highway speed, the vehicle unexpectedly decelerated and the seatbelts tightened as though a collision avoidance or emergency safety system had activated. There was no apparent vehicle, obstacle, or roadway hazard present that would explain the event. The incident occurred while family members, including a child passenger, were in the vehicle. The unexpected deceleration and seatbelt tightening created a significant safety concern because it occurred at freeway speeds without warning. Shortly after the incident, the check engine light illuminated and the vehicle was taken to an authorized Mercedes-Benz dealership for inspection. The dealership documented our complaint that the vehicle slowed on its own and that the seatbelts tightened when no other vehicle was around. The dealership later stated that it was unable to duplicate the concern and reported no fault found. Prior to this event, the vehicle had experienced multiple electronic-related issues, including failure to recognize the key while it was inside the vehicle, repeated "missing key" warnings while driving, and other warning messages requiring dealership diagnosis and software updates. After the freeway incident, the Forward Collision Warning returned, increasing concerns that the vehicle's collision avoidance or driver assistance systems may not be operating correctly. Because of the unexpected freeway deceleration, seatbelt tightening, warning messages, and prior electronic issues, we no longer have confidence in the vehicle's safety and reliability. The cause of the incident remains unknown.

Mercedes G63 with approx. 3500 miles will suddenly enter into collision avoidance mode. Specifically, the seatbelts will tighten up and the brakes will fully engage to stop the vehicle. In all cases, there was no risk of collision and the system engages with false positive alerts. The console display will indicate the area where the vehicle believed a collision may occur and there is nothing in that vicinity. The risk of injury and bodily harm is significant with this system as the vehicle is uncontrollable and can be rear-ended among other situations. The dealership inspected and confirms fault codes and they updated the vehicle's software but the issue persists. Merecedes should immediately recall all vehicles.

Sensors

The contact owns a 2025 Mercedes Benz AMG GLA 35. The contact stated while driving at 35 MPH on a green light, the contact noticed another driver speeding over the limit on her left side which caused the other driver to collide with the contact's vehicle. The contact stated the other vehicle collided with the contact on the driver's side of the vehicle. The contact lost control of the vehicle and crashed into a pole. The contact stated that none of the air bags deployed during the time of the accident. The contact noticed that the other driver involved in the accident air bags were deployed. No medical attention was provided but the contact sustained minor injuries the contact stated that the right side of their body was very sore and bruised. A police report was filed with the Cheltenham Police Department and a case was provided to the contact. The vehicle was towed to an independent mechanic for further investigation, the vehicle was not destroyed. The dealer was contacted and referred the contact to an independent mechanic for further assistance. Before the crash, the vehicle experienced shaking as the check engine warning light illuminated. The vehicle was taken toa dealer where the fuel injector was replaced. The manufacturer was made aware of the failure and a case was opened. The approximate failure mileage was 150.