2021 MERCEDES-BENZ Gle 350

While driving on the highway on three separate occasions the blind spot warning will pop up and show as inoperative, next the active break assist warning flashes as inoperative, and then the entire vehicle shows as inoperative and loses all acceleration and breaks down. This has happened three times. Stayed over night at the dealership they “drove it for 70 miles” it didn’t happen to them. They released the truck back to me saying it was perfectly fine. A day later it happened again while on the highway. Highly unsafe!

At approximately 87,000 miles, my 2021 GLE350 (M264 2.0T engine) experienced a severe engine misfire resulting in a flashing check engine light, rough idle, engine shaking, significant loss of power, and near-stall condition. The vehicle was taken to Speedhaus Automotive (Newbury Park, CA) where all four ignition coils and spark plugs were replaced. Total repair cost was approximately $635. This failure pattern is consistent with the documented M264 exhaust valve seat wear issue acknowledged by Mercedes-Benz technicians. A Mercedes dealer service report on an identical 2021 GLE350 explicitly states: "COMMON ISSUE FOR EXHAUST VALVE SEATS TO WEAR — KNOWN ISSUE WITH 260 AND 264 MOTORS." Mercedes-Benz has extended the warranty on the M260 engine (transverse variant) for this identical failure mode but has not extended it for the longitudinally-mounted M264 despite the same defect being present. Repair costs for full cylinder head failure on the M264 are being quoted at $6,000–$13,000. I am requesting NHTSA investigate whether a safety recall is warranted for the M264 engine across all affected GLE350, GLC300, C300, and E350 vehicles.

2021 Mercedes-Benz GLE 350 W. APROX: 30,000 MILES. PURCHASED THE VEHICLE 3 YEARS AGO, WHEN IT HAD 17,000 MILES ON IT. WHEN DRIVING AT TIMES THE PASSENGER REAR SHOCK WILL START MAKING SQEAKING / CREAKING NOISES. BEEN LIKE THIS FOR ALMOST 1 YEAR NOW. I DONT DRIVE THE VEHICLE VERY OFTEN, BUT WHEN I DO DRIVE IT IT IRRITATES ME. THE DEALERSHIP SAID THE SHOCK NEEDS TO BE REPLACED. THERE ARE NO VISIBLE LEAKS, NO ABNORMAL RIDE QUALITY, ETC.

The contact owned a 2021 Mercedes-Benz GLE 350. The contact stated that warm air was blowing from the A/C unit while activated. The vehicle was taken to an independent mechanic, and the contact was informed that a leak had caused the A/C unit failure. The mechanic referred the contact to the dealer for assistance. The vehicle was taken to the dealer where a diagnostic test was performed. The contact was informed that the HVAC system was inoperable and an estimate for the repair was provided. The manufacturer was notified of the failure, and the contact was provided a case number. The manufacturer denied responsibility for the failure but offered a monetary credit towards the repair. The vehicle was not repaired. The contact later traded the vehicle due to the A/C unit failure. The failure mileage was approximately 66,000. The VIN was not available.

While driving at night all error light showed up. I slowed down to the side of the road and while I was slowing down the engine died. I tried to start the car which worked but when I pressed the gas the engine died again. Tried it two more times with the same results. Then turned the car and waited a bit with the engine running. slowly started driving and was able to get home driving 20 mph. The next day took it to a shop that said that the battery was weak and they replaced the battery. Drove out of the shop and started hearing nosies from the engine. Immediately came back and was advised to take it to the dealer. Towed it to the dealer that checked it and said that they found metal in the oil filter and that I need to install a new engine. I read online and found many complains about the same engine issue with 2021 Mercedes GLE 350. Mercedes refuses to take responsibility that they built a faulty engine.

The vehicle has repeatedly experienced a sudden loss of acceleration, entering a reduced-power state while driving. Most recently, this occurred less than one week after I was advised that the issue had been fully resolved through a relay replacement. Critically, these incidents have occurred while my [XXX] child was in the vehicle, creating an unsafe and unacceptable situation. Below is a summary of the work that was done to resolve the safety concern. October: Drivetrain/Powertrain control unit internal fault Replacement of gateway/powertrain control module Wiring, grounding, and software inspections November: Active Brake Assist, ESP, and voltage supply faults Failure of both rear wheel speed sensors Replacement of left and right rear wheel speed sensors December: Dealership identified a faulty relay as the root cause Relay replaced and vehicle returned to service January, the vehicle again lost acceleration. And now, again in February. The same loss in acceleration incident. At this point, the vehicle has demonstrated a pattern of unresolved, safety-critical electrical failures. Given the repeated nature of the issue, the prior replacement of major components, and the involvement of braking and drivetrain systems, I no longer feel confident that additional part replacement without corporate oversight will result in a safe or permanent resolution. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

This is regarding a 2021 gle 350. The car was parked overnight and in the morning was unable to start or crank . I had to tow the vehicle to the service center that has maintained the car since purchased date and they told Me there’s a problem with the engine and I will need a new engine costing $28,000 dollars., the car has 42,000 miles and has an impeccable service history with Mercedes Benz. They did not tell me any specific engine part that’s faulty. There was no warning lights, check engine lights. Had I been driving this car and it happened it could have been catastrophic.

There is a known issue with the Cylinder Heads on specific models of Mercedes vehicles. Symptoms of M264 Cylinder Head Failure If your GLE 350 is experiencing these symptoms, it may be covered under the extension: Check Engine Light (MIL): Often triggered by misfire codes. Rough Idle: Noticeable shaking or uneven idling when stopped. Loss of Power: Potential stalling or significant power reduction during acceleration. Low Compression: Diagnostic tests often reveal low pressure in one or more cylinders. This is not being addressed my Mercedes USA where Mercedes Canada has offered an extended warranty. Using social media I have comprised a list of over a hundred impacted owners. Many more exist. What this does is cost catastrophic failure of the engine leaving the driver stranded in whatever lanes they were traveling in. I am disabled and for me this created a life threatening situation. When reaching out to MBUSA the answer is simply "not warranty exists" where MB Canada has extended the warranty to an additional 15k miles from notice. My engine blew. The replacement cost is near $20,000 dollars. The mileage on my engine was 65k. Many others are impacted and a class action lawsuit is the only other course of action it seems. Regards, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My vehicle suddenly started shaking and losing power, the check engine light came on and the problem continues to vibrate when idling, it will not shift into gear to go. Very unnerving and unsafe as it happened in a intersection. Sometimes it drives fine and then vibrates and goes into low gear and loses power. I took to a certified Mercedes dealer and they changed the spark plugs and 4 coils as well - After 4 weeks, I am told the CYLINDER HEAD needs to be replaced. It has 68k miles. The mechanic has already had 2 other 2021 GLE 350 with exactly the same issue. There are several similar cases discussed online as well.