What breaks most · 2016 to 2017 model years
Mercedes-Benz GLC300 problems by year
Owners have filed 231 safety complaints with NHTSA about the Mercedes-Benz GLC300 across model years 2016 to 2017. One year stands out: 2016 for engine complaints.
- Years to check closely: 2016
- Complaints on file
- 2312016 to 2017, all trims
- Worst year
- 2016133 complaints
- Crashes reported
- 124 fires · 7 injuries · 0 deaths
- Typical failure mileage
- 16kMedian where owners gave mileage
- Recall campaigns
- 24Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 133 | 9 | 12 | Engine (38) | |
| 98 | 3 | 12 | Engine (37) |
What fails on the 2016 Mercedes-Benz GLC300
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| EngineEngine gaskets and seals | 29% |
38 | 1 | Shop engine parts for the 2016 Mercedes-Benz GLC300 |
| BrakesBrake pads, rotors and calipers | 20% |
27 | 2 | Shop brakes parts for the 2016 Mercedes-Benz GLC300 |
| Unknown or other | 16% |
21 | 1 | — |
| Fuel systemFuel pumps and injectors | 14% |
18 | 0 | Shop fuel system parts for the 2016 Mercedes-Benz GLC300 |
| Air bags | 9% |
12 | 4 | Check recalls for air bags on NHTSA.gov |
| Electrical systemAlternators, starters and ignition | 8% |
11 | 0 | Shop electrical system parts for the 2016 Mercedes-Benz GLC300 |
| SteeringPower steering pumps, racks and hoses | 5% |
7 | 1 | Shop all steering parts, not filtered to this vehicle |
| Powertrain and transmissionTransmission parts | 5% |
6 | 1 | Shop all powertrain and transmission parts, not filtered to this vehicle |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
Check engine light on-pvc failure. Code PO52E-71as determined by reliable repair shop. Recommended to have vehicle repaired by dealer. Shop advised part is vital to emissions system.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Mercedes-Benz GLC300 years have the most problems?
By NHTSA complaint volume, 2016 carries the most filings on the Mercedes-Benz GLC300. The 2016 alone has 133 complaints, led by engine.
What is the most common Mercedes-Benz GLC300 problem?
On the 2016 model year, the most-reported component is engine with 38 complaints. The table above lists the top components for every year.
At what mileage do Mercedes-Benz GLC300 problems start?
The median mileage at failure across all Mercedes-Benz GLC300 complaints that include mileage is about 16,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.