AI Damage2019 Mercedes-Benz GLC 350 reliability: common problems
Owners of the 2019 Mercedes-Benz GLC 350 filed 6 complaints with NHTSA, most often about engine and electrical system. The maker issued 98 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 6
- involving a crash
- 2
- Technical service bulletins (TSB)
- 98
What fails most often
- 1 Engine 50% of all complaints
- 2 Electrical system 33% of all complaints
- 3 Vehicle speed control 33% of all complaints
- 4 Engine and cooling 17% of all complaints
- 5 Communication 17% of all complaints
- 6 Service brakes 17% of all complaints
- Engine: 3 complaints (50% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 2.
- Electrical system: 2 complaints (33% of all); manufacturer bulletins for this component: 41.
- Vehicle speed control: 2 complaints (33% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 1.
- Engine and cooling: 1 complaints (17% of all); manufacturer bulletins for this component: 5.
- Communication: 1 complaints (17% of all); manufacturer bulletins for this component: 2.
Symptoms owners describe
How many of the 6 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 3 | 1 | 2 |
| Electrical system | 2 | 0 | 41 |
| Vehicle speed control | 2 | 1 | 1 |
| Engine and cooling | 1 | 0 | 5 |
| Communication | 1 | 0 | 2 |
| Service brakes | 1 | 1 | 1 |
| Equipment | 0 | 0 | 20 |
| Steering | 0 | 0 | 10 |
| Structure | 0 | 0 | 9 |
| Exterior lighting | 0 | 0 | 8 |
| Powertrain | 0 | 0 | 7 |
| Fuel system | 0 | 0 | 3 |
| Visibility | 0 | 0 | 3 |
| Fuel/propulsion system | 0 | 0 | 2 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While the contact's husband was attempting to park the vehicle, the vehicle independently accelerated. The contact stated that the vehicle was uncontrollable. The vehicle crashed into two vehicles and then crashed into a tree before coming to a stop.
On 2/4/2022 this vehicle was picked up from [dealer] (Service Center) [phone]. The vehicle was brought in for service regarding error lights and service lights. I was driving the vehicle from dealership back to my home and was unable to stop my vehicle and ran a traffic light and crashed into a Northwell Hospital…
The contact stated while driving 62 MPH, several unknown warning lights illuminated, and the vehicle started to lose motive power. The contact stated that the temperature gauge warning light was illuminated and a message to âStop Vehicle Immediatelyâ was displayed.
The contact received notification of NHTSA Campaign Number: 22V365000 (Electrical System, Communication) however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not yet available.
As I drove the car a warning message popped in the screen stating "Malfunction" without any further details. The car kept running, apparently we'll at first. Then after car was turned off and turned on again the car accelerated by itself proving very dangerous.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 12,234 of 32,257 model years in the NHTSA data (top 38% most complained about).
On average one model year of the GLC 350 has 3 complaints (3 years in the data). This year has 6, above average.
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- 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…
- 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 vibration…
- 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 footwell or do they tend…
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the…
- Complaint There are several types of complaint about noises or poor windshield wiper wiping performance
A: Wiper blades squeaking, chattering, shuddering B: The windshield is not wiped completely (streaking) C: During the downward movement water is pulled back onto the windshield from the A-pillar (Figure 1) D: After…
- Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has extended the warranty for the…
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has extended the warranty for the accelerator pedal wiring harness and connectors from the original New Vehicle Limited Warranty of 4 years/50,000…
- Complaint Headlamp, front fog lamp leaky or fogged
Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in…
- Complaint 1
General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root…
- 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…
- Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the…
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in…
- Complaint Users report that the browser no longer supports search queries entered directly into the…
Complaint Users report that the browser no longer supports search queries entered directly into the address bar. Cause This update is due to Microsoft discontinuing the Bing Search API, which previously supported this…
- In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the…
In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA is extending the warranty coverage for the Diagnostic Module for…
NHTSA lists 98 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2019 Mercedes-Benz GLC 350?
Owner complaints to NHTSA most often mention: engine, electrical system, vehicle speed control. Total complaints: 6. The most frequent symptoms in complaint texts: warning lights, check engine (33%), loss of power / limp mode (17%), infotainment or screen glitches (17%).
How many service bulletins (TSB) were issued for the 2019 Mercedes-Benz GLC 350?
NHTSA lists 98 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2019 Mercedes-Benz GLC 350 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2019 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.