2020 Mercedes-Benz GLE 350: check engine light

Filed Oct 13, 2026 · Fuel system · SC

Fuel Rail Pressure Sensor failure (P0191) This issue generated a check engine light and limp home mode to be initiated. I have had the part changed and when it was changed the previous part had a manufacturing date of 2025. After replacing with new certified part the issue happened again less than a month later. I have researched and found out that Mercedes has issued a Campaign (L107.70-P-078047) for this issue but they are saying my VIN does not have a recall or campaign attached to it. My vehicle is presenting with the exact issues this campaign states and the same P0191 code that is mentioned in the campaign. It states that there is a software update needed and a flash done on the computer. This issue is causing a safety hazard for driving for when it goes into limp home mode at any speed and any location.

Filed May 28, 2026 · Engine · CA

The engine in my 2020 Mercedes-Benz GLE 350 experienced catastrophic internal failure while driving. No warning lights or check engine indicators came on. Prior to failure, the vehicle began making a loud metallic knocking/rattling sound during acceleration, similar to “rocks shaking in a box.” Shortly afterward, the engine suddenly stalled while driving and would no longer run. The vehicle still had electrical power but the engine would not restart. The vehicle was towed to Mercedes-Benz of Las Vegas for inspection. The dealer diagnosed the engine as seized and documented metal debris in the oil filter and oil/metal debris underneath the vehicle, indicating catastrophic internal engine damage. The dealer stated that the engine replacement was required.The failed engine and vehicle are currently located at Mercedes-Benz of Las Vegas and are available for inspection upon request.The vehicle stalled unexpectedly while being driven on a public roadway, causing sudden loss of engine power and creating a potentially dangerous traffic situation. The violent shaking and knocking before failure also caused concern that the vehicle could lose control or stop operating completely in traffic, which it ultimately did. A sudden engine seizure and stall while driving creates a significant safety hazard because the driver may lose the ability to accelerate, maneuver safely, or clear traffic. This could increase the risk of collision, especially at highway speeds or in heavy traffic conditions. Mercedes-Benz of Las Vegas inspected the vehicle and confirmed catastrophic engine failure. The dealer documented that the engine was seized and that metal debris was found in the oil filter and underneath the vehicle. The dealer advised that the engine required replacement and provided an estimated repair cost exceeding $27,000. The dealer has not yet identified the root cause of the failure. No dashboard warning lights, oil pressure warnings, or check engine lights illuminated.

Filed Dec 12, 2025 · Engine · 100,000 miles · SC

The contact owns a 2020 Mercedes-Benz GLE350. The contact stated that while driving at various speeds, the vehicle failed to accelerate as intended while the accelerator pedal was depressed. The check engine warning light was illuminated. In addition, the contact stated that while the vehicle was stopped, the vehicle was idling low. The vehicle was taken to a local dealer, where it was diagnosed with a misfire in cylinder #4. The vehicle was not repaired. Upon further investigation, the contact related the failure to a the federal safety agency recall; however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 100,000.

Filed Oct 25, 2025 · Driver assistance, Electrical · CA

Wire harness need to be replaces car is under 100k miles and the same issue has been recalled cla250 gla models with the same engine. Current model GLE is not under recall but has the same issue with the electrical issue “oil pump vavle connector fault” which cause engine light .

Filed Oct 20, 2025 · Engine · NY

I am writing to express serious concern regarding a potentially dangerous mechanical issue with my Mercedes GLE 350. The vehicle has experienced a complete cylinder head failure, requiring an estimated $7,000 repair. Both an independent service center and an authorized Mercedes service center have confirmed this diagnosis. During the inspection process, Mercedes conducted two diagnostic tests—one costing $250 and a second costing $700—before determining that the cylinder head must be replaced. I was informed by the Mercedes service advisor that the company is aware this issue has affected other GLE 350 vehicles; however, no recall has been issued to date. This failure presents a significant safety risk. The vehicle suddenly loses power without warning, and acceleration becomes severely limited, often not exceeding 20–40 mph even when pressing the accelerator fully. The check engine light illuminates at the time of power loss, leaving the driver unable to maintain safe highway speeds or merge with traffic—posing a serious hazard to both the driver and others on the road. Given that this appears to be a known issue, I am requesting immediate review and investigation by Mercedes-Benz. A recall or formal service campaign should be considered to address this potentially dangerous defect and to ensure the safety of all affected drivers. Thank you for your prompt attention to this matter.

Filed Oct 17, 2025 · Fuel system · 79,000 miles · PA

The contact owns a 2020 Mercedes-Benz GLE350. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the fuel pump. The vehicle was repaired. After investigating the failure, the contact related the failure to the federal safety agency Campaign Number: 23V445000 (Fuel System, Gasoline), but the VIN was not included. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 79,000.

Filed Sep 8, 2025 · Electrical · 44,000 miles · CA

The contact owns a 2020 Mercedes-Benz GLE350. The contact stated that the vehicle started to display failures with the air conditioning system blowing hot air. The vehicle was taken for inspection at a local dealer, and the contact was informed that the vehicle was experiencing electrical failures due to water entering the footwells, with the check engine warning light remaining illuminated. The vehicle was diagnosed, and the contact was informed that the air conditioning was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 44,000.

Filed Jul 11, 2025 · Engine · 71,000 miles · CA

The contact owns a 2020 Mercedes-Benz GLE350. The contact stated that while driving at low speeds, the vehicle entered LIMP Mode but continued to operate with reduced motive power. The contact was able to pull over to the shoulder of the roadway, where the failure persisted. The check engine warning light was illuminated. The vehicle was towed to an independent mechanic, who diagnosed the vehicle with engine control unit failure causing the engine to run lean, resulting in misfires in cylinders #1 and #2 and damage to the engine. The contact was informed that the engine had failed a pressure test and needed to be replaced. The contact was advised to take the vehicle to the dealer for assistance. The vehicle was towed to the dealer, who confirmed the diagnosis and determined that the failure could be resolved with a top end engine replacement of the cylinder head, valves, valve springs, rocker arms, camshaft, spark plugs, and valve cover. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the federal safety agency Hotline for assistance. The failure mileage was 71,000.

Filed Jun 29, 2025 · Engine · MS

I purchased my 2020 Mercedes GLE 350 new with only 12 miles on it. I also purchased an extended warranty which gave me 100,012 miles. On a Friday evening while being driven, the engine light came on. I took the truck immediately to the dealership on Monday morning. Prior to that the engine would roar loud upon starting on some occasions then calm down. When I mentioned it to the service department on previous service visits they told me it was fine and they notice that, that particular model does that when it gets hot outside. The vehicle also quit on me in the middle of the road before starting back up in about 3 minutes but on a separate visit. ALL my maintenance and service have ALL been done at the Mercedes service department so I'm confused how this happened. So, the dealership needed an extra day to diagnose so after 2 days I was hit with the news that is was a cylinder head...$9,963. I had 108,152 (out of extended warranty) miles on my truck. I notice this is a common issue with this particular year and model GLE350. I also see that Mercedes has a recall on other models just not this one. A recall is needed immediately. I pray this complaint will help others that will experience this same issue in the near future because there's no help for me now.

Filed Jun 13, 2025 · Engine · TX

Hi! I just received word that my 2020 GLE350 will need a replacement cylinder head. I went to the dealership due to having a check engine light on (light came on this morning and I promptly brought to the dealership). It is an $8,000 repair. Upon doing a quick websearch for replacement cylinder heads for 2020 GLE350s, I am finding a lot of people in web groups reporting that they are having the exact same issues for the same model (2020-2022) right after the 50,000k mileage mark (out of warranty). I have always done my maintenance directly with the dealership. Links to the chat forums with similar issues - can pull up more if needed. [XXX] Let me know if you need additional information - thank you! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 19, 2025 · Engine · DE

Bought a 2020 Gle 350 used with 55000 miles on it. Within 3 weeks the check engine light comes on and the car goes into limp mode. Cannot drive it. Took it to Mercedes of Wilmington. They said it was a misfire on 4. They replaced all spark plugs and the coil to cylinder 4. Another month later the same thing happens. Took it back to Mercedes. Stated the car needs a new cylinder head at the cost of 12000$. This seems to be a common problem on these vehicles. A recall is needed immediately

Filed May 14, 2025 · Engine · OH

At 48,000 miles the cylinder head needed replaced. This was done under warranty. At 73,000 miles the engine started making a horrible noise and power was lost and acceleration very choppy. Had it towed to the dealer. Dealer diagnosed the issue as a Rod bearing failure and requires the engine to be fully replaced. This occured while driving, fortunately I had just gotten off the highway, otherwise the vehicle would have lost acceleration and speed and would have created and unsafe situation. The engine light never came on, neither before or after the noise and loss of acceleration.