2019 Mercedes-Benz Gls 450 problems, complaints & recalls
Most-reported problem areas: Power Train (3) · Engine And Engine Cooling (3) · Suspension (2)
🧭 Reliability snapshot
Compared against other Mercedes-Benz Gls 450 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (2)
Electrical System:wiring 2024-03-15 · campaign 24V207000 · 116,020 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 GLE 350, 2020-2024 GLE 450, 2020-2023 GLS 580, GLE 580, 2019-2023 GLS 450, 2021-2023 Maybach GLS 600, AMG GLS 63, 2021-2024 AMG GLE 53, AMG GLE 53 Coupe, and AMG GLE 63 S vehicles. A 48-Volt ground connection under the passenger seat may not be secured properly, resulting in the ground connection overheating.
Risk: An overheated ground connection can increase the risk of a fire.
Fix: Dealers will inspect and tighten the 48-Volt ground connection as necessary, free of charge. Owner notification letters were mailed on May 3, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024040002.
Communication: Auto Crash Notification 2022-05-20 · campaign 22V365000 · 242,722 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.
Risk: A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
Fix: The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.
Service bulletins (126)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Power Train 2026-09-26 · LI27.00-P-073124 · Service Bulletin/Repair Instructions
complaint customer complaints relating to automatic transmission 725.0 (nag3 classic /9g‑tronic automatic transmission) and 725.1 (nag3 facelift/9g‑tronic automatic transmission facelift) for faster, more effective and more targeted diagnosis, intelligent predictive repair (ipr) has been developed a
Engine 2026-09-26 · LI18.00-P-073137 · Service Bulletin/Repair Instructions
complaint sporadic warning message in instrument cluster "engine oil pressure, stop switch off vehicle" (or similar) is shown in red on vehicles with low mileage. cause directional control valve may stick. remedy 1‑ read off oil level in instrument cluster and correct if necessary. 2‑ perform approx
Steering 2026-09-25 · LI46.10-P-077314 · Service Bulletin/Repair Instructions
complaint noises in the steering column area when steering. see example file in the attachments area: "mrsm‑schleifgeräusch_sccmgrindingnoises. mov". cause under analysis. remedy check which area of the steering column the noises occur in. do the noises tend to occur at the bottom in the driver foot
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
complaint repeat workshop visit for vehicle vibration while braking from 60mph. note: although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. cause although the cause of the vibra
Structure:body 2026-09-14 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Power Train 2026-09-14 · LI27.10-P-075869 · Service Bulletin/Repair Instructions
complaint only vehicles with a variable transfer case are affected. this can be identified through control unit n45 or n15/7 in the quick test. when accelerating with light load, vibrations or jolting sensation may come from the drivetrain. it may be mistaken for a harsh shift. cause modified oil qu
Showing the 6 most recent of 126 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-27 · Unknown Or Other“the ac/heating control unit failed prematurely at 40,000 miles, causing a complete loss of cabin heat and windshield defrosting capabilities. this creates a severe visibility and driving hazard in freezing weather, and risks the safety of a dependent child with high medical vulnerabilities.…”
2026-09-02 · Power Train · 56,000 mi“the contact owns a 2019 mercedes-benz gls450 4matic. the contact stated that vehicle was taken to the dealer for routine service, and it was discovered that the u-joint on front driveshaft was fractured and needed to be replaced. the contact associated the failure with nhtsa campaign number: 26v216000 (power train); however, the vin was not includ…”
2026-08-25 · Power Train“the vehicle suffered a sudden and catastrophic engine failure while being driven on the freeway at about 60mph. the engine seized and the vehicle lost propulsion creating a serious safety concern…”
2026-06-22 · Structure:body:hood“the front vehicle hood keep saying it open but is lock keep getting a message saying is open i am afraid is might come out lock and cause me to an accident …”
2026-05-22 · Engine“i am reporting a serious safety defect in my 2019 mercedes-benz gls450. my vehicle experienced low oil pressure warnings and engine warning lights, which were diagnosed as a faulty oil pump solenoid valve. the repair required removing major engine components, resulting in a cost of $5,000 that i paid personally. it is important to note that merced…”
2026-02-16 · Power Train“when i attempt to shift from park to to drive or reverse or even neutral the car wont respond. this has happened a couple of times in the last two months. i press on the brake in order to shift and it wont respond to any commands . i then have no choice but to turn off the car and then turn it back on. that usually works. this is unsafe if i was …”
2025-11-14 · Unknown Or Other“the panoramic sunroof spontaneously shattered while driving down the road. the glass blew out from the inside out. there didn't appear to be any issues with the sunroof before this. as far as safety, just the noise of the explosion was enough to surprise the driver causing a jerking of the steering wheel into the opposite lane of traffic which co…”
2025-06-10 · Air Bags“shows an error on the dashboard: 3rd row, right malfunction consult workshop…”
2024-12-06 · Engine And Engine Cooling · 91,000 mi“the contact owns a 2019 mercedes-benz gls450. the contact stated upon starting the vehicle, the check engine warning light illuminated intermittently. the contact stated that the failure had become consistent. the vehicle was taken to the dealer, where it was diagnosed that the engine oil pump valve and the camshaft adjuster had failed and needed t…”
2024-10-08 · Suspension“i have been showing an error "active curve system malfunction" intermittently since i bought this vehicle from mercedes dealership, and i've started seeing oil leak from reservoir. i've seen this is a recall from 2013 to 2017 model, but i'm unable to see this as a recall on 2019 model. …”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.