2026 Mercedes-Benz GLE Reliability Report

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.

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)

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.