Avoid: No year grades F. Weakest: 2010
Best: 2014
6 model years of NHTSA owner complaints and recalls · How we grade
Across 6 model years, the Mercedes-Benz GLK has 951 owner-filed NHTSA complaints and 0 recalls on record. The most-reported areas are air bags and fuel/propulsion system. 2010 drew the most complaints (241), 2014 the fewest (126).
Source: NHTSA complaints and recalls filed for Mercedes-Benz GLK vehicles (US, public record). Typical used asking price $9,000–$13,245.
Complaint volume by model year. Raw NHTSA totals, not adjusted for sales volume or time on the road, so older and higher-selling years accumulate more. Every year links to its full breakdown.
Highest: 2010 (241 complaints). Lowest: 2014 (126).
Sentiment is mixed and heavily dependent on model year, engine choice, and maintenance history.
Shuddering, fluid mixing with coolant due to radiator failure, CAN bus communication faults, loud thumping during shifts.
Steering column lock (ESL) failure preventing start, various control module communication errors, bizarre behavior after battery replacement (e.g., cooling fan running with key off).
Expensive emissions system repairs (cited at $4,000-$5,000 USD), turbocharger failures, concerns about long-term reliability of the Bluetec system in the US.
From camshaft adjuster solenoids (M272 engine), valve cover gaskets, and other seals.
Failure to start in very cold temperatures (below -5°F / -20°C), extended cranking.
Owner insights cover all generations of the GLK. Individual model years are broken down above.
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