Had an update on the software to control collision prevention on the car, and soon afterward it began to deploy at certain spots without any other car in front for at least 50 feet. Took it back to the M-B Seattle dealer and after 4 weeks of investigation, I was told that the matter is exterior to the car and that the car performs as intended. T still drive the car and it still gives me warnings of impending to engage the collision detection braking system. I don't feel very comfortable driving it in the city.

- Cary, NC, USA

I was driving to meet a friend for lunch. I came up upon a stop light that was already red and I would have been the third car in line. I came to what I thought was a stop. I was about a car length or more behind the car in front of me. Next thing I know, I hear a loud bang as my car had accelerated into the car in front of me with my foot on the brake. That car, in turn, hit the car in front of them. I was very confused. I received a traffic ticket for uncontrolled speed. The policeman thought I was I was crazy when I said that I had come to a stop. The car was drivable, so I still went to lunch with my friend. No problem whatsoever with parking or driving the car to the restaurant, which was about 1 mile away. After lunch, I then needed to run an errand before I went home. I drove about 2 blocks away from the restaurant and pulled into a shopping center. I then slowly pulled into a parking spot between two other cars. As my car hit the curb, it then went over the curb, onto the sidewalk and slammed into the concrete wall of one of the shops. I was able to get home, very shaken, and researched on the internet. Everything I found indicated it was sudden unintended acceleration (sua). I told my insurance company and also called Mercedes Benz usa. I had my car towed to the Mercedes collision repair shop. Mercedes did a recorded conversation and said not to have the car repaired and they would look at it. They were defensive when I mention sua, but my mat is velcroed on and it happened twice in one day. After the second collision, I saw a message on my dash that said : ?collision prevention assist plus inoperative". my airbags never deployed. I checked at the Mercedes collision center today and was told Mercedes removed a black recording box from my car. I have not heard anything back as of yet. I am afraid to drive this car even if it is repaired.

- Flower Mound, TX, USA

We have had this car about a year, we encounter numerous occasion the the "collision assist plus" has engaged intermittently w/O any reasonable obstacle in front of the car when it is in motion. About a month ago, the car gave message "collision assist inoperative" and I can even get the car in gear not with multiple restart. Last week I went out with my wife and the car stop on the busy street on the stop and go traffic and the car did "auto start stop" was unable to restart and it disengage the transmission and I had to restart the car manually and reengage the transmission. I had file complaint about intermittent "collision assist " condition to the dealer (house of import, buana park, ca), the service adviser said it is normal for the collision assist acting up some time. I believe there are some software gremlin or some other ECU issue need to be address. It S a safety concern to keep driving this can w/O any solution, I did contacted mbz usa, they offer no help nor solution at all.

- Westminster, CA, USA

The brake pedal and the gas pedal are too close together. I am constantly feeling the slight touch of the brake pedal when stepping on the gas. I have had multiple cars and SUV's in the past and I cannot every recall touching the brake when gassing. I am very conscious of the proximity of the 2 pedals and try to not touch the brake. It still happens from time to time.

- Mars, PA, USA