The Lemon Index
Transmission complaints owners filed with the U.S. government (NHTSA) for each model year, per 100,000 cars sold. A complaint counts when it's filed under the transmission, or under the power train and the owner describes the transmission (shifting, slipping, gears, CVT). It's an owner's report, not a confirmed defect, and older years have had longer to collect complaints.
What owners describe
Share of this model's transmission complaints that mention each symptom. One complaint can mention several.
In owners' words
Transmissiongoes into neutral while driving car at times. sometimes it will not go back into gear No movement of car on freeway potential of being hit from behind. problem reproduced, inspected by independent shop not inspected no lights
2018 Mercedes-Benz GLK/GLC owner · NHTSA complaint
The steering column stalk controls drive, reverse, neutral and parking. I stopped the vehicle on an incline in a parking lot. I had my foot on the brake. I shifted into neutral. The engine was still running. I thought I pushed the park button but the car rolled back into another vehicle.
2018 Mercedes-Benz GLK/GLC owner · NHTSA complaint
Quick answers
Which Mercedes-Benz GLK/GLC years have transmission problems?
By transmission complaints filed with NHTSA per car sold, the worst Mercedes-Benz GLK/GLC years are 2010, 2018, 2014.
What are common Mercedes-Benz GLK/GLC transmission problems?
Owners most often describe lost power while driving, hard or jerky shifting, shudder.
Which Mercedes-Benz GLK/GLC years have the fewest transmission complaints?
Since 2010, the Mercedes-Benz GLK/GLC years with the fewest transmission complaints per car sold are 2022, 2023, 2012.
See every problem, not just the transmission: Mercedes-Benz GLK/GLC reliability by year. How we count