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
The vehicle slips into neutral and says 4 matic not available. I have to coast to a stop and then shutoff the vehicle, turn it off and then restart it. Also the forward collision warning alerts when I pass underneath a large metal freeway signage.
2015 Mercedes-Benz GLA owner · NHTSA complaint
Car randomly shifts to neutral, displays message : "reverse not available" or "transmission malfunction". Car rapidly slows down causing cars behind to make avoidance maneuvers. Scanned fault codes: P079200 (transmission rpm sensor 1 malfunction) P274600 (transmission rpm sensor 2 malfunction)
2015 Mercedes-Benz GLA owner · NHTSA complaint
Quick answers
Which Mercedes-Benz GLA years have transmission problems?
By transmission complaints filed with NHTSA per car sold, the worst Mercedes-Benz GLA years are 2019, 2015, 2018.
What are common Mercedes-Benz GLA transmission problems?
Owners most often describe lost power while driving, hard or jerky shifting, slipping.
Which Mercedes-Benz GLA years have the fewest transmission complaints?
Since 2010, the Mercedes-Benz GLA years with the fewest transmission complaints per car sold are 2017, 2016, 2018.
See every problem, not just the transmission: Mercedes-Benz GLA reliability by year. How we count