"Is the B Serisi 250e reliable, and what should you check?"
When buying a used Mercedes-Benz B-Class 250e 2021 (247), the most frequently mentioned issue is: Limited usable battery capacity and exaggerated WLTP range. Also, real electric range varies significantly (seasonal drop and daily use) is commonly reported.
Engine: M282
M282.914 · turbo petrol · 250e · Used in this car from 2020-2021
Known engine issues
Limited reliability data due to short production runThis engine has not been in production long enough to gather reliable failure statistics.
Direct injection causes intake valve cokingDirect injection promotes rapid carbon buildup on intake valves.
Oil consumption complaints on foreign forumsSome complaints about oil consumption can be found on foreign forums.
Known issues and risks
Listed from most frequently reported, each with its source.
Limited usable battery capacity and exaggerated WLTP range
Often reported
The plug-in hybrid battery's gross capacity is about 15.6 kWh, while net usable capacity is only about 10.9 kWh. This makes it difficult to achieve the stated WLTP electric range (56-67 km) under real driving conditions.
Electrical
Real electric range varies significantly (seasonal drop and daily use)
Often reported
Italian user reports indicate that real electric range can be noticeably lower than WLTP values, especially in cold seasons or with heavy in-car electrical use, sometimes losing a few kilometres (e.g., below ~60 km).
Electrical
Dual-clutch transmission (DCT family) risks and maintenance
Often reported
Dual-clutch transmissions in many compact Mercedes models have shown weaknesses related to mechatronics and oil pumps.
Transmission
Mercedes-Benz B Serisi 250e technical specs
Mercedes-Benz B Serisi 250e (2021): boot 405 L; 0–100 in 6.8 s.
What to look for when buying a Mercedes-Benz B-Class 250e?+
When buying a 2021 250e, check service history, test drive, and engine/transmission warnings. Most commonly reported issues: Limited usable battery capacity and exaggerated WLTP range; Real electric range varies significantly (seasonal drop and daily use); Dual-clutch transmission (DCT family) risks and maintenance.
What are the chronic problems of the Mercedes-Benz B-Class 250e?+
Most commonly reported issues: Limited usable battery capacity and exaggerated WLTP range; Real electric range varies significantly (seasonal drop and daily use); Dual-clutch transmission (DCT family) risks and maintenance.
Is the Mercedes-Benz B-Class 250e reliable?+
Instead of a simple yes/no, it's necessary to evaluate proven pros and cons together. This page lists 3 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from Difetti fault database records; brand, fuel, engine, and generation compatibility between source and target vehicle are verified. Topics with insufficient evidence are not shown.
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.
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