2020 Mercedes-Benz GLE 350 Problems

What owners report

Owners of this model year most often describe engine trouble — rough running, misfires, check engine lights and, in a cluster of reports, cylinder head work — commonly showing up around the 40,000–70,000 mile range. A second, largely separate group of complaints covers electrical and climate faults: lost A/C refrigerant, blank or rebooting screens, and batteries that go flat without warning. Many complaints are filed at low mileage, so both early electronic glitches and higher-mileage engine wear appear in the sample.

1. 1
   Engine

   Cylinder head failure and misfires

   • 19 complaints (21%)
   • median 71,000 mi at 5.8 yrs old (3 state mileage, few)
   • owner-quoted repair $8,000 (median of 6 quotes)
   • filed 2023–2025

   Owners describe rough idling, shaking at stoplights, hesitation or loss of power, and an illuminated check engine light; some report stalling. Dealers and independent shops diagnosed burnt or leaking valve seats and cylinder head damage, with quotes for replacement in the several-thousand-dollar range. Several owners say the repair was declined as out of warranty and that routine maintenance had been done. Most reports fall between roughly 40,000 and 70,000 miles, some just after the 50,000-mile warranty mark; a few appeared earlier.

   What to check: Ask for service records and whether the check engine light has ever been on; have a pre-purchase inspection include a compression or misfire check on all cylinders, especially near or past 50,000 miles.

   2 excerpts from owner complaints in NHTSA records

   “As many other GLE 350 owners reported on various forums, same thing happened to me. My car suddenly started shaking and some cylinders misfiring. My car is just 2020 and barely got 60,000 miles on it. Initial report shows that two cylinders misfires with no reason. It's failing the emission and car will not pass emission test anymore. Mercedes says it's out of warranty and asking 15k to replace cylinder head.”

   NHTSA complaint #11636187, filed 2025-01

   “My car shook while idling the last two weeks of June 2025. It felt like it was going to shut off at light/stop sign which it did on two occasions. On July 2, 2025, it stalled abruptly during a drive after which I took it to Mercedes for service. I never received a warning signal or fault message even after it stalled. Mercedes service indicated the engine cylinder head valves were burnt and not sealing properly - estimated cost of repair $10,023.00. …”

   NHTSA complaint #11674209, filed 2025-07
2. 2
   Electrical system

   A/C loses refrigerant / weak cooling

   • 26 complaints (29%)
   • median 12,000 mi at 1.2 yrs old (9 state mileage, few)
   • 2 mention a crash, fire or injury
   • filed 2019–2026

   Complaints describe the air conditioning blowing warm or failing entirely, sometimes with a hissing or seeping sound from the dash and refrigerant found to be very low. Shops traced it to leaks at the evaporator or receiver drier and quoted replacements; some owners say the dealer treated it as a customer-pay repair. Water in the footwell was also reported alongside cooling and electrical faults. Reported from low mileage up to around 70,000 miles; several complaints involve cars only a few years old.

   Recall 23V177000Recall 21V288000Recall 19V587000

   What to check: Run the A/C on a hot day and confirm it gets cold quickly; ask whether the drain-hose recalls were performed and whether any refrigerant leak or evaporator work has been done.

   2 excerpts from owner complaints in NHTSA records

   “I am submitting a safety complaint regarding my 2020 Mercedes-Benz GLE 350 due to what appears to be a significant air conditioning refrigerant leak. The vehicle rapidly loses refrigerant shortly after being recharged. When the system is operating, a loud seeping/hissing sound can be heard from the HVAC system area, followed by complete loss of cold air within a very short period of time. …”

   NHTSA complaint #11738600, filed 2026-05

   “The a/c unit failed and is available for inspection upon request. Being in an over-heated car can cause dehydration, heat exhaustion and/or heat stroke. I was nauseous and dizzy while driving, putting myself and my passengers at risk. Upon taking my car to a independent service dealer, it was revealed that their is a leak and the evaporator must be replaced. It has not been inspected by a Mercedes dealer yet. No warning messages.”

   NHTSA complaint #11748669, filed 2026-07
3. 3
   Engine

   Stalling or sudden loss of drive power

   • 19 complaints (21%)
   • median 4,700 mi at 1.3 yrs old (5 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2020–2026

   Several owners describe the vehicle shutting off or entering limp mode while driving or at a stop, sometimes with a warning to stop driving and no restart. Fuel rail pressure sensor and fuel pump failures were diagnosed in some cases, with the check engine light on and reduced power beforehand. Others report a stall with the engine running rough on restart, and dealers varied between repairing and being unable to identify a cause. Spread from a few thousand miles to around 100,000; some reports at low speed and during stop-start driving.

   Recall 19V5720003 related service bulletins

   What to check: Ask whether the fuel pump or rail pressure sensor has been replaced, and have a scan for stored engine fault codes done before buying.

   2 excerpts from owner complaints in NHTSA records

   “While driving in a parking lot at a low speed my car turned off by itself I kept pushing on the accelerator but I realized the car is not moving, it had shot off by itself. I turned the car on manually and then worked. It was a terrifying situation. I kept thinking what if I was on the freeway and my car had turned off while the moving traffic was about 70 miles. I contacted mercedez bez and I was told it might have been a glich and that they could not duplicate it. I feel that is a very dangerous glich.”

   NHTSA complaint #11386822, filed 2021-01, 4,700 miles

   “My 2020 Mercedes-Benz GLE 350 experienced a complete engine seizure at approximately 60,000 miles without any warning signs. The vehicle shut down and would not restart. The engine is completely inoperable. I am aware of recalls involving engine stalling and fuel system issues in this model, and I believe this may be related to a broader defect. Mercedes-Benz has not offered support as of this writing.”

   NHTSA complaint #11686335, filed 2025-09
4. 4
   Electrical system

   Screens blank, reboot, or electrical gremlins

   • 17 complaints (19%)
   • median 47,000 mi at 3.8 yrs old (8 state mileage, few)
   • filed 2020–2026

   Owners report the infotainment screen going black, restarting, or losing functions, sometimes for a day or more, and occasionally a headlight staying lit after shutdown or a dead battery leaving the car unable to start. The rearview camera image was also described as blank or glitchy even after a recall repair. Dealers sometimes could not reproduce the fault or found nothing wrong with the battery. Mostly early in ownership, often below 50,000 miles; some reports at very low mileage.

   Recall 21V354000Recall 22V232000Recall 21V058000Recall 22V3650003 related service bulletins

   What to check: Cycle through the screen, camera and radio functions during a test drive, confirm recall software updates were applied, and ask about battery replacement history.

   2 excerpts from owner complaints in NHTSA records

   “To Whom It May Concern: I am submitting this complaint regarding my 2020 Mercedes-Benz GLE 350 and respectfully requesting review of a serious infotainment and electronic system failure that occurred at approximately 49,000 miles. Prior to the failure of the MBUX infotainment system, the vehicle began exhibiting abnormal electrical behavior. On multiple occasions, the right headlight remained illuminated even after the vehicle had been completely turned off and locked. …”

   NHTSA complaint #11739765, filed 2026-05

   “After starting my vehicle and placing it into drive, a warning message appeared on the dashboard stating, “Vehicle warning Do not continue to drive,” indicating that the vehicle would be unable to move forward or in reverse. Immediately following the warning, the vehicle lost all ability to move in either direction while other vehicles were approaching, creating a hazardous situation placing my safety at risk. I was required to keep my foot on the brake and ultimately place the vehicle in the park position. …”

   NHTSA complaint #11707704, filed 2025-12
5. 5
   Forward collision avoidance

   Driver-assist warnings and unexpected braking/steering

   • 12 complaints (13%)
   • median 12,000 mi at 0.8 yrs old (5 state mileage, few)
   • 2 mention a crash, fire or injury
   • filed 2020–2026

   Owners describe messages that lane keeping, blind spot and active brake assist are unavailable, sometimes cutting in and out mid-trip and requiring a restart to clear. Others report adaptive cruise braking for exit signs, roadside vegetation or no obstacle at all, and one complaint describes the car pulling during a wet-highway maneuver. Dealers in several cases could not reproduce the messages. Reported from a few thousand miles upward, typically on highway or multi-lane driving.

   Recall 21V071000Recall 19V5400003 related service bulletins

   What to check: Test the adaptive cruise and lane keeping on a highway stretch, confirm the ESP and radar-related recalls were completed, and ask whether assist-system warnings have been reported before.

   2 excerpts from owner complaints in NHTSA records

   “We were driving our mercedes GLE 350 on I 80 near mile marker 203.1, ohio on 7/11/2020 at 7 am. It was raining a bit in morning. The lane departure assist was on, and it was turning green and gray continuously. I keep lane assist on all the time for safety purpose. I was driving on the slow lane on right most lane at approximately 60 miles. Suddenly the vehicle lost control and started slipping on the road. I tried to control it, however it would not come under control. …”

   NHTSA complaint #11340617, filed 2020-07, 30,000 miles

   “I have had three instances I believe the collision avoidance system failed in my new car. The first instance was a wrong way driver coming towards me on a freeway offramp. I estimate that we were within about 30 feet of each other and traveling approximately 30mph when we both quickly swerved to avoid a collision. No warning and no automatic braking occurred. The next two instances both involved driving at night on surface streets in which I last minute braked to avoid hitting stopped cars in front of me. …”

   NHTSA complaint #11399152, filed 2021-03, 12,000 miles

Buying note. This model year shows two fairly distinct patterns — engine and cylinder head repairs at mid-to-higher mileage, and electrical or A/C faults that can appear early — so a thorough pre-purchase inspection plus a check that all open recalls were completed is worth the cost. Service history on the engine and any A/C or fuel-system repairs matters more than cosmetics.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.