What 23 owners told NHTSA about the 2024 Mercedes-benz GLC Coupe

Attention Assist System Suspended notification comes on randomly on vehicle while driving, rendering driver defenseless with regard to safety warnings that would otherwise be in effect, such as blind spot assist, attention assist, which are vital components for safe driving. This has happened on numerous occasions, most recently on 12/06/2024 while driving under destination route guidance. It has also happened when car was stopped to retrieve mail at residence mail box and, at other times for no apparent reason, while driving. Each time when engine was restarted the dashboard read 'System suspended' and continued to do so until car was returned to dealer. This vehicle was purchased on 12/21/2023 and with less than 350 miles began repeated problems with warnings, the first of which was "Check engine"on 02/02/2024, as car was running rough. Car was repaired(dealer determined cause was electrical/software error, fault code) yet before driving out of the dealership the same 'check engine' warning reappeared and vehicle had to be returned to service that same day for the same problem. Since that date in 2023, this vehicle has had numerous seemingly computer related issues that render it unreliable as to the safety devices this vehicle features that should always be maintained. On 03/21/2024 with less than 950 miles the fans remained running after shutting vehicle off and a message appeared stating" cooling system malfunction/reduced drive performance" with a red triangle on dashboard. Dealer determined the cause was 'SOFTWARE" At this point I am concerned that this vehicle is over engineered with computerized options that randomly fail. On another occasion the lights on one side may have been on overnight. The lights (courtesy lights) were on on the right side overnight in garage. My safety is continuously at risk whenever a warning appears.I replaced my GLK specifically to have Blind Spot Assist, PRE-safe, Attention Assist, Active distance assist and other features.

NHTSA ODI 11629760

When driving the car at night with the headlights on, you notice a dark, thin object illuminated from the left front headlight approximately 50-75 feet ahead of the vehicle that will move as the steering is turned, either left or right. It looks like a thin pedestrian moving into the path of the car. I noticed this defect within the first few weeks of ownership. I took the car to the dealership and showed my pictures of the lights with the shadow at night to two Mercedes Benz of Sarasota employees. The dealership ran multiple diagnostic tests and determined the car was operating as designed. While the dealership had my car, two employees at the dealership noted they had relatives who had 2024 Mercedes Benz vehicles and had noticed this same issue. They also received the same explanation that this was the design of the headlights. It is concerning, as it could cause a driver to swerve or otherwise create an issue that leads to an accident. I request NHTSA look into this headlight issue and encourage Mercedes Benz to fix this before an accident happens. I have uploaded the work order documents from the dealership. I have uploaded a picture of the shadow reflected on a car ahead of me to show the shadow up close.

NHTSA ODI 11574540

2 SEPERATE ISSUE DIGITAL LIGHTING FAILED, THEN 2ND ISSUE WHICH IS STILL BEING WORKED ON, BEEN A WEEK WITHOUT THE VEHICLE WHICH IS ONLY A MONTH OLD WITH 1100 MILES ON IT, THE ENTITE SYSTEM ISNT WORKING WITH LOTS OF CODE ERROR MESSAGES AND WILL NOT START. THE CURRENT UPDATE FROM MERCEDES IS THEY STARTED A CASE AND TESTING THE VEHICLE AFTER REPLACING THE POWER TRAIN. THE TECHNICIAN AGREED THIS IS NOT NORMAL FOR SUCH A BRAND NEW CAR. I AM CONCERNED FOR MY FAMILYS SAFETY AND THINK THIS IS A LEMON

NHTSA ODI 11564146