Mercedes Benz Glc Class Coupe
Problems & Worst Years
Every reported problem for the Mercedes Benz Glc Class Coupe, model year by model year — ranked from 86 federal NHTSA complaints across 2017–2018.
GLC-Class Coupe complaint volumes land almost identically across its two recorded model years — 46 occurrences in 2017, 45 in 2018 — but the composition shifts noticeably between them. In 2017, a fuel-system crankcase ventilation failure leads at 16 occurrences, rated high severity, followed by panoramic sunroof failure (7), seat belt retractor malfunction (6), a recall-related note on electrical and engine issues (5), and an airbag malfunction rated safety severity at 4 occurrences — the year's only safety-rated complaint.
By 2018, the crankcase ventilation issue reappears but is now classified under the engine system rather than fuel, still the top complaint at 13 occurrences. Airbag malfunction returns too, this time logged 7 times and rated high rather than safety severity, alongside 7 reports of transmission shifting issues. Seat belt latch plate retraction (6 occurrences) and brake squeaking and grinding noise (4, rated low) fill out that year's top five, and none of 2018's eight distinct problems carry a safety rating.
No recall campaign numbers appear in the data provided for either year, though one 2017 complaint references recall activity involving the electrical and engine systems generally — worth verifying independently against the VIN. Across both years, the crankcase ventilation problem and airbag malfunction reports are the two threads consistent enough to warrant specific attention during a pre-purchase inspection.
With similar totals in back-to-back years, neither model year stands out as clearly worse, though 2017's single safety-rated complaint is worth weighing against 2018's higher-volume but not safety-rated version of the same airbag issue. As always, these counts reflect what owners reported to NHTSA rather than a precise failure rate, and a thorough inspection plus complete service records matter more for any individual vehicle than the specific year on the title.
Mercedes Benz Glc Class Coupe problems by year
Complaint volume by model year (bar = relative to the worst year). Theworst yearsare the most-complained-about, weighted by safety-risk problems.
| Year | Complaint volume | Problems | Safety / High | Most common problem |
|---|---|---|---|---|
| 2017worst | 44 | 9 | 1/4 | Positive Crankcase Ventilation (PCV) System Failure Fuel system · 16 complaints |
| 2018worst | 42 | 8 | 0/4 | Engine Crankcase Ventilation Valve Malfunction Engine · 13 complaints |
Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls, 2017–2018. Problem clustering and year rankings are derived from the complaint record; complaint volume reflects reports filed, not total incidence or fault rate. Vehicle image is illustrative.