Mercedes-Benz B-class reliability: common problems by model year
Across 2 model years, the Mercedes-Benz B-class has 49 owner-filed NHTSA complaints and 0 recalls on record. The most-reported areas are power train and engine. 2015 drew the most complaints (28), 2014 the fewest (21).
2
Model years tracked
49
Owner complaints
0
Recalls
28
Median per year
Source: NHTSA complaints and recalls filed for Mercedes-Benz B-class vehicles (US, public record).
Which B-class years have the most problems?
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.
\nSentiment is mixed and highly dependent on the specific powertrain and model year. The gasoline and diesel variants of the W246 generation are generally praised by owners for their practicality, spacious interior, comfortable ride, and fuel efficiency. They
\nB-Class Electric Drive (B250e) motor failure: Electric motor prone to internal coolant leaks, leading to extremely expensive replacement. Frequency: recurrent.\n\nB-Class Electric Drive (B250e) battery failure: Battery pack replacement costs are "thousands and thousands of dollars." Frequency: isolated.\n\nPoor reliability from specific poorly maintained examples: Instances of cars with "dodgy repairs" (e.g., badly repaired oil sump) leading to significant issues. Frequency: isolated.\n\nMissing basic features (Electric Drive variant): Lack of interior hatch release, lack of backup camera (on a 2016 model). Frequency: isolated.\n\nLow ground clearance: Scraping the underside on speed bumps is reported as frequent. Frequency: isolated.\n\nRemarks\nThe owner feedback clearly delineates between the conventional internal combustion engine (ICE) W246 B-Class and the Electric Drive variant. The ICE models enjoy a reputation for solid reliability and practicality, with one owner citing a reliability survey score of 96%. In stark contrast, the Electric Drive variant is portrayed as a high-risk ownership proposition once its extended battery/powertrain warranty has expired, primarily due to the cost of its Tesla-supplied drivetrain components. The data suggests the vehicle's reputation is highly sensitive to maintenance history; a single poorly maintained example can lead to a negative assessment, while well-maintained examples are reported to be trouble-free. Analysis based on approximately 15 substantive owner discussions focused on the B-Class.
Owner insights cover all generations of the B-class. Individual model years are broken down above.