Mercedes-Benz GLK 350: which model years draw the most owner complaints?
904 complaints filed with NHTSA about the Mercedes-Benz GLK 350, model years 2006 to 2015. No model year stands out for the engine or transmission against the others. Quietest mature years by complaint count: 2014, 2015. Counts of unverified owner reports, compared only with other years of the same model; not failure rates.
Complaints by model year
| MODEL YEAR | COMPLAINTS | VS OTHER YEARS | STANDS OUT | RECALLS |
|---|---|---|---|---|
| 2006 GLK 350FEW REPORTS | 2 | — | 0 | |
| 2007 GLK 350FEW REPORTS | 5 | — | 0 | |
| 2008 GLK 350FEW REPORTS | 1 | — | 0 | |
| 2010 GLK 350 | 241 | — | 5 | |
| 2011 GLK 350FEW REPORTS | 133 | — | 4 | |
| 2012 GLK 350 | 167 | — | 4 | |
| 2013 GLK 350FEW REPORTS | 137 | — | 6 | |
| 2014 GLK 350FEW REPORTS | 104 | quiet: 1 of 6 | 5 | |
| 2015 GLK 350FEW REPORTS | 114 | quiet: 2 of 6 | 4 |
"Stands out" = 40 or more complaints naming that system and at least twice the model's quiet (lower-quartile) year, or twice the share seen across every vehicle of that model year. Newer years have had less time on the road. "Quiet" ranks only years with 7+ years on the road and 20+ complaints. NHTSA data through November 2026.
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Other Mercedes-Benz models
Mercedes-Benz AMG E 55 · Mercedes-Benz C 230 · Mercedes-Benz C 250 · Mercedes-Benz C 300 · Mercedes-Benz C 320 · Mercedes-Benz C 350 · Mercedes-Benz CLA 250 · Mercedes-Benz E 300 · Mercedes-Benz E 320 · Mercedes-Benz E 350 · Mercedes-Benz E 500 · Mercedes-Benz E 550 · Mercedes-Benz GL 450 · Mercedes-Benz GLA 250 · Mercedes-Benz GLC 300 · Mercedes-Benz GLE 350 · Mercedes-Benz ML 320 · Mercedes-Benz ML 350 · Mercedes-Benz Metris · Mercedes-Benz R 350 · Mercedes-Benz S 430 · Mercedes-Benz S 500 · Mercedes-Benz S 550 · Mercedes-Benz S Class · Mercedes-Benz SL 500 · Mercedes-Benz Sprinter 2500 · Mercedes-Benz Sprinter 3500. All makes and models.
Source: NHTSA public complaints, recalls, service bulletin and investigation databases, data received through November 2026. Complaints are unverified reports from owners, not failure rates: sales volumes are unknown, so a model year is only compared with other years of the same model. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Year pages: 20102012