What 8 owners told NHTSA about the 2026 Mercedes-benz GLE 350 4matic

In most circumstances the adaptive cruise control (ADC) works well. There is one case where it does not, however. When ADC is active and the vehicle immediately in front shows, perhaps to make a turn, the ADC-equipped vehicle slows appropriately. The problem: Once the front vehicle is *well clear* of the driving lane, often operating 90 degrees to the marked lane on a perpendicular roadway, the ADC-equipped vehicle delays in sensing this and dos not resume the set speed. The effect is for traffic behind the ADC-equipped vehicle to become exceedingly annoyed and a chain-reaction of braking results. Drivers operating behind the Mercedes-Benz have a reasonable expectation that when the traffic in front of the ADC-equipped vehicle is clear the latter will accelerate. This expectation is not met in practice -- ever. The result is near-miss rear end collisions This exact same issues was also observed on a 2025 Mercedes GLE450.

NHTSA ODI 11748273

On May 26, 2026 I was driving our new Mercedes 2026 GLE350 to [XXX]. The car had 737 miles on it, when it died in traffic on [XXX]. The car was purchased new on April 11, 2026 from the Mercedes dealer in Monterey, CA. When the car died in traffic, an emergency message appeared on the screen "Automatic brake assist not working, Stop the car immediately, Do Not Drive". I was barely able to cross two lanes of traffic in order to get to the right shoulder of the very busy freeway. The dealer in Monterey was contacted and said it sounded like an electrical issue. The car was towed to the nearest Mercedes dealer in Stevens Creek, San Jose Ca. (phone [XXX]) The service advisor at Stevens Creek is named Erica Flores. After 4 days at that dealership, she advised us that they "were unable" to duplicate the problem and that a software fix would have to be addressed by the main shop in Germany. No one knows when the software will be available. We were able to get copies of the repair order, Invoice number XXX. The car was returned to us and we drove back home to Pacific Grove, CA without any other issues. On XXX my wife was once again traveling to [XXX]. At approximately 1:15 pm the car did the exact same thing. Losing power while she was traveling at 65 miles per hour on the busy [XXX]. Again, the computer screen displayed several messages including the braking system, the cooling system and instructed her to turn the car off immediately and not to drive. The car now has approximately 1150 miles on it. We notified the dealer in Monterey Ca, and also the dealer in San Jose (Stevens Creek). My wife spoke again with Erica Flores at the Stevens Creek Mercedes dealer. Erica told my wife she could not help her and that all they could offer is a storage facility for us, with a cost of approximately 160 dollars per day. These issues represent a major safety concern which needs to be addressed by M.B. USA. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11743941

On April 2, 2026, while driving at highway speed in heavy traffic, the vehicle experienced a sudden and complete loss of forward propulsion without warning. Engine RPMs increased with no corresponding acceleration, consistent with catastrophic transmission slipping. The vehicle could not maintain safe speed. I coasted to a stop and was able to limp at low speed to a parking area. The vehicle was towed to the selling dealer (Mercedes-Benz of Tysons Corner, Vienna, VA) by Mercedes-Benz Roadside Assistance. The dealer diagnosed the failure as a broken propeller shaft inside the transmission requiring replacement. No root cause explanation has been provided. The vehicle had approximately 2,455 miles and was 45 days from the lease date of February 16, 2026. This vehicle uses the Mercedes-Benz 9G-TRONIC (725.0) 9-speed automatic transmission with 48V EQ Boost mild-hybrid system — the same platform and powertrain covered by NHTSA Recall 24V-118, which addressed transmission-related loss of propulsion in over 105,000 MY2020–2023 GLE 450 and GLS 450 vehicles.

NHTSA ODI 11730660

Pulled on door handle and handle came off the rear driver side door for the second time.

NHTSA ODI 11729722

The contact leased a 2026 Mercedes-Benz GLE450 4Matic. The contact stated that while driving at an undisclosed speed, there was an unknown warning light flashing on the instrument panel. The speed limit was displayed and was flashing. The contact turned off the feature, but the light continued to flash on the instrument panel. The vehicle was taken to the local dealer on two occasions, where an unknown diagnostic result was provided. The manufacturer was working on an update for the fix. The vehicle was not repaired. The manufacturer was mailed a letter, and a subject matter expert contacted and informed the contact that there would be a fix within the first quarter of the year. The failure mileage was unknown.

NHTSA ODI 11728321

While driving on a limited-access highway at 65 mph with cruise control engaged, the vehicle unexpectedly reduced speed to 50 mph without any driver input under steady traffic and road conditions. No braking was applied by the driver, and no warnings or alerts were displayed prior to or during the speed reduction. Separately, the vehicle’s displayed speed-limit information was unstable during highway driving. The display repeatedly changed between the correct posted speed limit, a blank display, and “---” under consistent conditions, without changes in roadway, signage, or map context. This behavior was observed multiple times and was captured on video recording. The unexpected reduction in speed created a safety risk due to loss of speed relative to surrounding traffic.

NHTSA ODI 11712886

I am writing to lodge a complaint regarding my brand new vehicle, which has been in the shop for over a 3 months since its purchase on [XXX]. I picked up my 2026 Mercedes GLE 450 from Baker Mercedes Benz in Charleston, and it started malfunctioning about 20 minutes into the trip home. The following day I brought it into my local Mercedes dealership, Myrtle Beach Mercedes Benz, for inspection. The first available appointment was 10 days away, so I was unable to drive the vehicle for that period after the purchase. I brought the car in on October 10th, and a few hours later, I received a call stating that it was ready, and it was just an upgrade that needed to be installed. However, upon returning to the vehicle at the service department, I noticed the engine light was still illuminated. They were unable to diagnose the issue at that time. The dealership contacted me a week later, informing me that Mercedes was opening a case, and there was no estimated timeframe for resolution. In the meantime, I have been provided with a loaner vehicle that does not have a tow package, which was the primary reason for purchasing the vehicle. Consequently, I have been unable to boat or jet ski for the past 3 months. Our summer season has largely ended, and I have missed at least 60 days of pleasant boating weather due to my new Mercedes being inoperable since my delivery date of [XXX]. The vehicle was sent to a local body shop called Darrell's where it has sat for at least 10 weeks. The problem is that the main ground for all the electronics was never tightened or welded. It burnt all the carpet in the back and could have easily caught fire with my family inside . I smelled something burning on the way home but wasn't sure what it was. The auto body place said we were lucky that the vehicle didn't catch fire with my family inside. MBUSA is only willing to compensate me for the price I paid for the car but not for all the additional expenses incurred since inception. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11706556

I was driving in I75 highway south in Michigan and heading to Ohio. I had around 70 mil/hr ish speed and was trying to pass a commercial truck. I Just turned on rear window wiper to clean it and once it started to work, the vehicle had a very hard brake for a couple seconds which the my seat belt pushed me hard to the seat to avoid of my head to go forward to windshield. Fortunately it was very quick brake and didn’t caused any accident, but I was worried that it was repeated again and had a lot stress until I arrived at the destination. I am guessing probably either park brake was engaged without touching it(software or part issue) or the sensors for front and emergency collisions had the bad function.

NHTSA ODI 11705424