2023 Mercedes-Benz EQS

The vehicle has experienced recurring intermittent failures of Active Brake Assist and Active Blind Spot Assist. The systems may function normally and then unexpectedly become unavailable, with warning messages appearing in the vehicle. The primary driver was nearly involved in an accident during one occurrence when Active Brake Assist unexpectedly became unavailable. No collision occurred, but the loss of the braking-assistance function created a serious safety concern. The problem has been inspected by authorized Mercedes-Benz dealers on multiple occasions. During an April 2026 dealer visit, the dealer documented both the Blind Spot and Active Brake Assist warnings, stored communication fault codes involving the front radar sensor/DISTRONIC, a bent front radar sensor bracket, and a loose front grille. The problem later recurred, and the vehicle was returned to a Mercedes-Benz dealer on August 27, 2026. The vehicle remains at the dealership and is available for inspection. The dealer now states that the front radar/module mounting bracket is cracked and attributes the condition to outside impact. The vehicle has never been in an accident and there is no visible damage to the front emblem or exterior front of the vehicle. When asked how the dealer determined that an impact caused the bracket damage, the owner was told that the DTC report supported that conclusion, but the dealer declined to provide a copy of the report. During the same discussion, a Mercedes-Benz service consultant stated that the bracket is very flimsy and can crack from something as minor as leaning on the vehicle. This raises concern that the mounting bracket for a safety-related radar system may be unusually susceptible to damage during ordinary use. The recurring failures affect systems related to collision warning, automatic braking assistance, and blind spot detection. The vehicle and affected components remain with the Mercedes-Benz dealer and should be available for inspection.

The center console display (MBUX) on this 2023 EQS 450 4MATIC fails while the vehicle is in use. There is no warning lamp, chime or message first. Sometimes it flickers on and off; other times it goes fully blank and stays blank, unresponsive to touch. Owner video shows the display working and then completely blank 0.4 seconds later. When the screen is blank the rearview backup camera is unavailable. Selecting reverse produces no image at all. The rear camera image appears only on that center screen, so the failure removes the rear visibility required by FMVSS 111 and leaves the driver reversing with no camera view in parking garages, driveways and residential streets. An authorized Mercedes-Benz dealer has reproduced and confirmed the failure across five visits, from 7,916 miles in August 2025 to 20,789 miles in August 2026, with 28 days out of service. In May 2026 (RO 1410670) the dealer diagnosed fault B159211, a short circuit to ground on the data line between the head unit and the central display, removed the dashboard and replaced a harness. The technician reported that instead of removing the original short-circuited harness he cut off its connector ends, taped the exposed cables and left that harness inside the vehicle. The failure recurred ten weeks later and was recorded on video on 29 July 2026. On the most recent visit (RO 1418392, 26 August to 3 September 2026) the dealer wrote "tech confirmed customer concern," reviewed the video, and recorded fault B162997: the data line between the reversing camera and the head unit has a malfunction. The entire central display was replaced. The defect has survived a software reflash, a harness replacement and a display replacement. This vehicle was previously repurchased by the manufacturer under California lemon law for a defective rearview camera and was certified in writing as fully repaired before resale. The vehicle, the video and all repair orders are available for inspection on request.

I would like to report 3 issues. One, happened yesterday, XXX. Driving on [XXX], in clear weather, no obstacles, no vehicles around, the vehicle engaged emergency breaking and pulled seatbelts as if there was an imminent crash. Second issue, the carpet behind rear doors is separating on both sides, preventing the rear doors from closing normally and it is catching the seatbelt prong. Third issue, the handles retract when children are trying to open the doors, catching their fingers while retracting and causing minor injuries. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The electric refrigerant compressor on my 2023 Mercedes-Benz EQS 580 4MATIC SUV failed without warning. On this vehicle, the compressor is a dual-function safety-critical component: it provides cabin air conditioning and, more importantly, active cooling for the high-voltage lithium-ion battery pack. I am filing this complaint because a single-point failure in a component responsible for high-voltage battery cooling should not occur on a vehicle of this age and mileage, and because owners receive inadequate warning of the safety consequences when it does. I request that NHTSA investigate the failure rate of the electric refrigerant compressor on 2022–2024 EQS-platform vehicles and evaluate whether the battery thermal management design provides adequate redundancy and driver warning The vehicle was taken to an authorized Mercedes-Benz dealer, which confirmed the refrigerant compressor failure and replacing the compressor under warranty. Parts are backordered per Mercedes. The vehicle has been off the road for 28 days The dealer did indicate awareness of similar failures on other EQS vehicles.

There are several issue with the 2024 Mercedes EQS. I had the car have a full system failure and stop in the middle of the road with no warning. It could not even be towed. Apparently coolant was leaking without any warning. This caused a complete system failure- car wouldn't power on, couldn't be towed, couldn't be pushed to a safe location- nothing. The next most concerning issue is car automatically locks itself within seconds and with the key inside and with a passenger inside. My baby was trapped in the car. I came out of the driver seat and the key was in my purse. This could've resulted in a fatal incident. I live in [XXX] where we have a lot of heat. What if my key and phone were both in the car and my daughter was trapped. The car has locked automatically with key still in the car on multiple occasions. The car shuts off on its own within 2 minutes while passengers are inside. Again, as a parent this is deeply concerning and can lead to a fatal incident and overheating The lane correction is extremely harsh and many times wrong pulling the car in the wrong direction and with a lot of force INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2023 Mercedes-Benz EQS AMG 4MATIC. The contact stated that while driving at a slow speed, the vehicle stalled and failed to restart. While exiting the vehicle, the vehicle shut off. The vehicle automatically locked after closing the door. The contact's child became locked inside the vehicle on several occasions. The contact's husband was able to unlock the doors with his phone. The contact had previously been stranded for three hours. The vehicle was towed on a flatbed to the local dealer, and a software check was performed. The vehicle was diagnosed, and it was determined that the coolant level was low. The contact was informed that the anti-theft system was working as designed. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 47,000.

Odometer Fraud. The contact leased a 2023 Mercedes-Benz EQS 450 X4. The vehicle was a dealer sale. After returning the lease vehicle to the dealer, he was informed the odometer closure was not available during the drop-off and it would be emailed. The contact stated that the vehicle was returned with the mileage at 17,000. The inspection report also indicated that the odometer reading was 17,000. The contact received a bill that indicated that the mileage was 7,000. The finance office was contacted, and they informed him to return to the dealer. The dealer indicated that the discrepancy was not his problem. The police were contacted, and a report was filed.

While making a left turn at low speed, I applied the brakes, but the vehicle did not respond as expected and instead appeared to drift, surge, or accelerate forward. The vehicle struck a fire hydrant and a bus stop pole before crashing into a tree. Airbags deployed and both occupants sustained injuries. I suspect a possible malfunction involving braking, propulsion, electrical, or speed control systems. No final cause has been determined. The vehicle should still be available for inspection. Mercedes-Benz USA has opened a case regarding this incident.

I am reporting a serious safety issue with my 2023 Mercedes-Benz EQS SUV. On multiple occasions, the vehicle has suddenly lost power and completely stopped while driving on the freeway without warning. During these incidents, a red warning symbol appeared on the dashboard (a red turtle icon), indicating a critical malfunction. These failures created extremely dangerous situations, as the vehicle lost the ability to maintain normal driving speed in active freeway traffic. At the time of these incidents, my three children were in the vehicle, which significantly increased the risk of a serious accident. This issue has occurred multiple times, suggesting a serious and recurring defect. The sudden loss of power combined with dashboard warning signals presents a major safety hazard and could lead to severe injury or fatal accidents. I no longer feel safe operating this vehicle and request that this issue be investigated as a potential safety defect.

Several times, the car's "panic braking" has randomly slammed the brakes and tightened the seat belt. After the first few times, I took it to Mercedes and they re-uploaded software which was hard for them for some reason. It fixed the problem. Luckily, I had always been on small streets. But today, the panic braking happened again, only this time, I was on a major road (4 lanes at 35 mph) and, with nothing around me, no cars in front of me, the panic braking and seatbelt tightening happened so violently that I was thrust forward with enough force to hurt my hip. Nothing severe no doctors needed. I will take it back into Mercedes for another review but what if there had been someone behind me or I hadn't been wearing my seat belt. I would have been hit hard or gone through the windshield. (I was wearing my seatbelt and always do). This has happened at least 5 times since I've owned it.