2020 Mercedes-Benz GLS-Class owner complaints

Vehicle would not start. 48v battery light came on. Waited 15 minutes, vehicle started, drove to dealership who did diagnosis. Battery replacement required $1800 + $1200 labor. 2020 vehicle with 61K miles. Bought certified vehicle from MBZ dealership, added a MBZ 3 year or 100K mile extended warranty but this battery is considered a wear and tear item not covered. That would be fine except for the fact that this battery issue is well known to MBZ as it has multiple reported instances of failure on vehicles with 6K to 60K miles.

The vehicle warnign system displayed "48v Malfunction." Vehicke lost all acceleration in the middle of the highway. The vehicle was just returned3 days ago after undergoing a state inspection at the MB dealership. In looking at the issue on line this appears to be a known problem to Mercedes. They are even facing a class action lawsuit for it in the same model year GLE, which is based on many of the same systems. SOmeone is going to get killed when their vehicle stalls in the middl eof the highway.

Upon starting the car, the screen of the 2020 Mercedes Benz GLS 450 remained blank. This includes the portion of the dashboard that reads speedometer, gas, temperature, RPM. The engine was running and truck could still be driven. The vehicle is available for inspection upon request. This is a major safety issue as the driver does not have visibility to the dashboard with all it's important information. The vehicle is currently at Mercedes Benz dealership undergoing diagnostics. The vehicle is being inspected by Mercedes Benz (manufacturer). See prior comment. There were no warning lamps or messages that appeared prior to the problem. Shortly after driving home (with the blank screen) the car was shut off and restarted and the display came back on but then the check engine light was

I have noticed a significant issue with the AC vent system of my Mercedes GLS 450. The vents seem to be distributing mold smell already took my vehicle multiple times to park place Mercedes in Dallas and they performed service but the issue is persistent. I have taken the vehicle to my local Mercedes service center, where they attempted to address the issue. However, despite their efforts, the problem has persisted. This defect is impacting not only the comfort of my driving experience but also the overall value and performance of the vehicle. We had GLE in my family that had the same issue we took it to Park Place and complained about this many times and end up selling the vehicle as they never resolved the issue. Vehicle: 2017 MERCEDES-BENZ GLE350 VIN: [XXX] INFORMATION REDACTED PUR

While driving the vehicle, a series of electrical system warnings were displayed in rapid succession. Shortly thereafter, the vehicle lost power, the engine shut off, and the vehicle began to glide. This incident occurred on a residential street while the vehicle was travelling at 25-30 MPH. The warnings were specific to the 48v electrical system. The vehicle was operable after the incident and it was driven to the dealership. The repair invoice and the warning pictures are attached. The issue was traced to a grounding issue as most of the connections between the electrical system and the vehicle's chassis were inappropriately filled with paint (assumed from the vehicle assembly process).

While driving on the New Jersey Turnpike on November 17, 2023, a burning smell was noticed inside the car. The smell lasted about an hour. No smoke was present and the car continued to operate. While concerned, I assumed it was environmental and outside the car. On November 25, 2023 my car threw a 48V battery warning and forcibly shut off. We were not on a highway at the time and were able to pull over to a gas station. MB roadside was called and towed the car to Euro Motorcars Devon of Devon, PA, the local Mercedes-Benz dealer and where I purchased the car and receive service. Over the course of the next few weeks the service department concluded and ultimately determined that there were burnt out cables which were connected to the 48V battery (this is highlighted in the service

The vehicle issued a “48v battery malfunction” and the car warned me not to drive the vehicle under any circumstance. This was while driving at 55 mph on a country road. The dealer I bought the car from had 3 other cars brought in for the same issue. The dealer my car was towed to said they just had one with the same issue come in. Based on my reading, this is a serious issue and it appears that changing the battery does not correct the issue. I was transporting my entire family at the time. The thought of not being able to break when traveling at high speeds is terrifying. Seems to be a widespread issue on the newer cars. Mine is only a year old.

AMENDMENT TO ACTIVE CASE 11723015. CRITICAL AIRBAG & SAFETY DEFECTS. This files a safety defect amendment to open case 11723015. Diagnostic scans confirm central data bus network collapse on VIN [XXX] has migrated into safety-critical occupant restraint and visibility modules, violating 49 U.S.C. § 30118. I. AIRBAG & RESTRAINT HAZARDS Scans from [XXX], document active faults: DTC U042782: "Implausible data received from Electronic Ignition Lock." The SRS module receives corrupted data from the failed ignition gateway, creating risk of airbag non-deployment. DTC B007A13: Passenger seatbelt pre-tensioner open circuit; occupants are unprotected against crash displacement. DTC B11FA4B: Active "Overtemperature" faults in heating elements indicate localized thermal short-circuit risk. II.

While driving, vehicle has abruptly stopped/engine turned off causing car to not accelerate and come to a stop. One instance was on a busy freeway, causing our family to pull off the interstate with nearly no curb, risking rear-end collision due to the abrupt stalling of the vehicle. In this instance, the 48 volt battery failure warning, engine overheat warning, engine light warning came on. When MCB dealership evaluated the vehicle, there were no stored associated error codes and MCB service returned the vehicle to me saying that the issue did not occur when they drove it. The same issue occurred again 5 months later, this time in a busy intersection, where the car would not accelerate and I was forced to pull of the road. The check engine light as well as other failure lights came on. TH

The fuel rail system failed on the passenger side of the engine and leaks. This is the same issue seen on, but VIN number isn't apart of it: Campaign No. : 2022030003 CA DMV. : 220303 NHTSA ID 21V961 I have taken the vehicle to a Mercedes dealer twice for the concern of smelling gas. The second time I had a video but the service tech couldn't replicate the leak. This safety concern pose a great risk as the gas could come into contact with a hot surface and ignite but passenger at HIGH risk. The problem has taken to the dealer twice with video showing the leak., however they cannot reproduced confirmed/replicate it. No the vehicle or component has not been inspected by the police, insurance representatives or others? But has been taken to the dealership, not the manufacturer. No war

Clip missing from right hand side passenger seat (2nd row), causing the seat to fold all the way forward multiple times on its own. This happened when the car was stationary. The dealership fixed the issue and added the missing clip.

We intermittently experience phantom braking, including on the highway with no objects or vehicles ahead of us (for example, not on a curve, no vehicle visible within half a kilometer). Vehicle abruptly slows. This includes when in a lane (no lane change). It also can occur during a properly indicated lane change. It occurs when we are driving the posted limit. It also occurs when there are no parallel nearby roads. This appears to be a significant safety issue.

I have received multiple notifications over several months that read "Camera view restricted". This impacts the collision avoidance and adaptive highbeam assist functions. Dealer has offered no service recommendations.

This incident occurred around 5:50pm on Wednesday, September 21, 2022. I was driving on a merge connector between two freeways in San Francisco at about 60mph, when the vehicle threw a series of error codes and warnings on its displays, culminating with “shut down engine immediately”. The first error was a 48V battery system charging failure, and the second was a warning that coolant was too hot. The instrument panel and steering and brakes did not lose power, but the accelerator no longer worked, and the vehicle slowed down to about 35mph. I had to merge across 4-5 lanes of rush hour traffic at this speed (sketchy) to make it to the side of the freeway, and was able to exit safely and stop in a safe spot. Upon turning off the vehicle for a few minutes and then restarting it, a generic

On numerous occasions, when either slowing down or in a slow turn, the engine dies and will not reengage until I have turned off the vehicle, exited, then reentered an started the vehicle. I have had passengers in the vehicle who will attest to this occurring, in fact, the last time it happened, I was almost broadsided when the vehicle stopped in the middle of a left-hand turn, crossing three lanes of oncoming traffic. The vehicle has been to the dealership at least three times and it's either a "software update" requirement or "we can't duplicate" the issue. When I called MB Customer Service, Michael (initial intake) told me "I have seen this issue before."

intermittent rear view camera inoperable when you shift from park to reverse. Doesnt come on even if you turn off and tune on the engine.

The adaptive cruise control feature of this vehicle on various highways [XXX] , [XXX] and the [XXX] ) and in various locations while traveling at highway speeds has mis-read speed limit signs and aggressively decelerated(I assume by using its regenerative braking) to as low as 35mph while traffic is moving at 65+mph. The dealership was unable to duplicate this issue. No faults are displayed to the driver. I do not know if rear brake lights are illuminated when this occurs. This is an aggressive and scary deceleration with no warning. I fear a rear end collision is likely. No one aside from the dealership has inspected this vehicle INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

We were driving the vehicle at about 30 MPH on a road when suddenly the engine completely shut off. There was no more power steering and no warning that it turned off. We got the car slowed down and once we came to a stop the car put itself in Park. After that we could restart it and keep driving with the car acting very different. This then happened again later on in the day going about 20 MPH up to a stop light. It shut itself off and luckily we were able to come to a stop with the brakes without running into the intersection and no one hitting us from behind. Once again it put itself in Park. We were able to restart the car and drive again with diminished power and really weird shifting from the transmission. The check engine light turned on both times and when we got it to the dealersh

The passenger rear wheel brake caliper lower bolt got loose. The bolt is most likely not available for inspection. The caliper body then started rubbing against the wheel inside surface and caused a noise. If the caliper body had jammed into the wheel and stopped it from rotating, say on the highway, the vehicle could have skidded or rolled over? The MB dealership inspected and replaced the bolt. There were no warning lamps, messages or other symptoms of the problem prior to the failure. The noise came during braking on tuesday, 28 May. The car was repaired by the MB dealership on Thursday, 30 May.

03/17/2023 driving on US1 coming up to speed after pulling onto highway after cars passed I went 0.2 miles and was looking at my driver side mirror ( no traffic on road ahead of me) when I hit something that pushed my big SUV toward oncoming traffic. I held wheel and muscled car to side of road stopping short of a telephone pole. Car was upright I had trouble loosening seat belt while my wife was hanging forward into hers. Dog harnessed in back seat was ok Got out of car to see a car hauler 30? Footer sticking about 4 feet into the road and travel lane. Investigation by police revealed truck driver backed out of a company driveway into the road with no people helping. With traffic totaled right front tearing wheel off. No air bags deployed, I do not believe accident avoidance nor auto bra