| Issue ID | 1253653 |
| Internal NHTSA # | 10820195 |
| Manufacurer | Mercedes-Benz USA, LLC. |
| Brand | MERCEDES-BENZ |
| Model | S550 4MATIC |
| Model Year | 2016 |
| File date | 20/12/15 |
| Component | UNKNOWN OR OTHER |
| Product type code | VEHICLE |
| Description of the problem | Collision prevention assist plus does not work. It's suppose to work from 4 mph to 65 mph. It does not recognize stopped cars or objects in it's path. It's suppose to autonomously apply the brakes to help prevent collisions with other vehicles. It never intervenes. When a car cuts me off or pulls out in front of me or stops in front of me,the safety features do not intervene. I have to brake hard to avoid a collision every time. A warning tone,the seat belts should pre-tension,place the seats in a more favorite position conclusive to an accident, close the windows & sunroof. Brakes before you have time to put the brakes on. It does non of those things. I have had a 2007 s550 with all the safety options & they worked perfectly every time. It would put the brakes on hard before my feet had time to hit the brakes it would close the windows and sunroof and put the seats in a more favorite position for an accident it would bring it to a complete stop before hitting anything in front. I am a safe driver and keep a proper distance to cars in front. I have never been in an accident that was my fault. But other people do not drive like that. I have cameras in the front windshield and rear window that constantly record. It will show cars passing me and pulling in front with less than a car length away and my car never responds with any of the safety features.( autonomously braking, seat belts pre tightening etc.) it should do those things faster than humanly possible. The problem with the systems is that it thinks 20 ft. Is100 feet and 60 ft. Is 200 ft. So it thinks there is plenty of time to slow down. That is the way the system is suppose to detect vehicles in front and to the rear of the car. So the programing that is controlling the distance is programed wrong. My 2014 was bought back for that reason and i was given a 2016 replacement. All the 2014 & 2015 & 2016 did not work either. |
| Vehicle Mileage at Failure | 45 |
| Number of Occurences | |
| Source of the issue | NHTSA WEB SITE |
| City and State | WESTBROOK, ME |
| VIN pattern | WDDUG8FB3GAXXXXXX |
| Was vehicle invloved in a crash? | N |
| Was vehicle involved in a fire? | N |
| Was incedent reported to police? | N |
| Was medical attention required? | N |
| Was part original equipment? | |
| No. of injured persons | |
| No. of fatalities | |
| Date of purchase | 07/08/26 |
| Was original owner? | N |
| Anti-lock brakes | N |
| Cruise control | N |
| Number of cylinders | |
| Drive train type | |
| Transmission type | |
| Vehicle speed | 35 |
| DoT tire identifier | |
| Tire size | |
| Location of tire code | |
| Type of tire failure code | |
| Was defective tire repaired? | |
| Date of manufacture | |
| Type of child seat code | |
| Type of restraint | |
| Dealer's name | |
| Dealer's telephone number | |
| Dealer's city | |
| Dealer's state code | |
| Dealer's ZIP code |