B-Class E-Cell (2014)
Engine Reliability Ratings
Mercedes-Benz B-Class E-Cell Unidentified Engine
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Complaint Breakdown
Known Issues
Battery & Propulsion Reliability
Battery Electric (BEV)
Battery & propulsion complaint analysis for the 2014 Mercedes-Benz B-Class E-Cell
That's about 2.0x the typical rate for BEVs in this dataset (median 5.5 per year). Above peer average — but high-volume models naturally produce more raw complaints, so check the issue mix below before drawing conclusions.
What kind of battery complaint?
Among the 14 battery-related complaints, here's the type mix. These percentages describe what the complaints are about — not how reliable the vehicle is overall.
Loss of power, drive unit, inverter, traction motor, DC-DC converter.
Propulsion battery defects, capacity loss, BMS faults, replacement claims.
Low-voltage battery deaths, common on EVs and hybrids that use a 12V for accessories.
Sample complaint excerpts
Electric Propulsion
- [2014] The contact owns a 2014 Mercedes-Benz B-Class Electric Drive. The contact stated that after stopping at a stop sign, the vehicle lost motive power before the "Malfunction visit workshop" and "Stop switch engine off" messages were displayed. After restarting the vehicle, the vehicle returned to normal functionality; however, the failure recurred more frequently. No warning lights were illuminated.
- [2014] Coolant leak causing catastrophic drive unit failure.
- [2014] Motor suddenly stopped on highway. This was extremely dangerous. Vehicle transported to Mercedes Benz, they have indicated the electric drive motor has failed. This is the second drive motor in this car that has failed in only 48K miles. We have two of these cars, same year and model. The motor has also failed in the other vehicle. There is an entire Facebook group talking about failures of
High-Voltage Battery
- [2014] TL* THE CONTACT OWNS A 2014 MERCEDES BENZ B250E. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 30 MPH, THE BATTERY LIGHT FLASHED AS THE VEHICLE BEGAN TO LOSE POWER. DESPITE THE FAILURE, THE CONTACT WAS ABLE TO COAST THE VEHICLE TO HER HOME. THE NEXT DAY, MULTIPLE ATTEMPTS WERE MADE TO START THE VEHICLE AS SEVERAL WARNING LIGHTS APPEARED ON THE INSTRUMENT PANEL. DUE TO THE FAILURE, THE CON
- [2014] VEHICLE BATTERY WARNING LIGHT CAME ON INSTRUCTING TO STOP DRIVING VEHICLE IMMEDIATELY. LIKE SO MANY OTHER OWNERS WHO HAVE FILED COMPLAINTS, MERCEDES DEALER-MECHANIC SAID THAT COOLANT HAD GOTTEN INTO BATTERY AND DRIVE UNIT NEEDS TO BE REPLACED. ESTIMATED COST $12,000 - RENDERING CAR TOTALLED. INDEPENDENT EV SPECIALIST HAS PRESSURE TESTED COOLING SYSTEM AND FINDS NO LEAKS. FORTUNATELY, I WAS IN A
- [2014] IN PREPARING TO LEAVE A PARKING LOT ON NOVEMBER 23, 2016 IN HILLSBORO, OREGON, THE B-CLASS MERCEDES-BENZ ELECTRIC DRIVE AUTOMOBILE REFUSED TO MOVE AND A MESSAGE APPEARED IN THE INSTRUMENT PANEL SAYING "HAVE ME TOWED TO A DEALER" OR SOMESUCH. VEHICLE WAS TRANSPORTED TO BEAVERTON, OREGON MERCEDES-BENZ WHERE THE DIAGNOSIS WAS A DEFUNCT MAIN TRACTION BATTERY. BATTERY, WHICH COSTS ABOUT 90 PERCENT OF
12V Auxiliary Battery
- [2014] EXTREMELY DANGEROUS SUDDEN LOSS OF POWER WHILE DRIVING 70+ MPH ON BUSY HIGHWAY. WAS ALMOST INVOLVED IN A SERIOUS TRAFFIC COLLISION BECAUSE IT A STOPPED IN THE ROAD. ATTEMPTS TO RESTART THE VEHICLE FAILED. COULD NOT GET THE VEHICLE OUT OF "PARK" AND WAS UNABLE TO SWITCH IT INTO "NEUTRAL" TO ROLL THE VEHICLE OUT OF THE LANE OF HIGH SPEED TRAFFIC. THE INABILITY TO GET THE VEHICLE INTO "NE
Source: classified from NHTSA complaint and recall data. "Battery-related" includes high-voltage propulsion battery, charging system, hybrid drivetrain, electric propulsion, regenerative braking, 12V auxiliary battery, and thermal-event complaints. Other complaints (suspension, steering, brakes, infotainment) appear in the engine and vehicle-level sections. Rates are absolute counts, not normalized per-VIN — high-volume models naturally produce more raw complaints than low-volume ones. Self-reported death and injury counts are capped per complaint to limit form abuse.
Vehicle-Level Issues
These issues affect the Mercedes-Benz B-Class E-Cell regardless of engine variant.
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Frequently Asked Questions
What are the most common 2014-2014 Mercedes-Benz B-Class E-Cell problems?
The 2014-2014 Mercedes-Benz B-Class E-Cell has accumulated 21 NHTSA complaints. The most frequently reported problem areas are Transmission, Electrical System, Engine. As with any used vehicle, an inspection before buying and a vehicle history report are recommended.
Which Mercedes-Benz B-Class E-Cell engine is most reliable?
The 2014-2014 Mercedes-Benz B-Class E-Cell was offered with 1 engine option. Based on NHTSA complaint data, the Mercedes-Benz B-Class E-Cell Unidentified Engine has the lowest complaint density and is considered the most reliable choice for buyers.
Is the 2014-2014 Mercedes-Benz B-Class E-Cell a good used car?
The 2014-2014 Mercedes-Benz B-Class E-Cell can be a sound used car depending on trim, mileage, and maintenance history. With 21 total NHTSA complaints on record, prospective buyers should review the known problem areas and check for open recalls before buying.
How many NHTSA complaints does the 2014-2014 Mercedes-Benz B-Class E-Cell have?
The 2014-2014 Mercedes-Benz B-Class E-Cell has 21 complaints filed with NHTSA as of our latest data pull. Complaint counts reflect owner-reported issues and do not necessarily indicate defects or safety risks on their own.
What recalls affect the 2014-2014 Mercedes-Benz B-Class E-Cell?
There are 0 NHTSA recalls affecting some 2014-2014 Mercedes-Benz B-Class E-Cell vehicles. Recall status varies by VIN — check the NHTSA recall database at recalls.nhtsa.dot.gov with your specific VIN to confirm which campaigns apply.
What should I check before buying a used Mercedes-Benz B-Class E-Cell?
Before buying a used Mercedes-Benz B-Class E-Cell, verify all open recalls are completed via the NHTSA VIN lookup tool. Pay particular attention to Transmission, Electrical System, Engine, which are the most commonly reported problem areas. Request maintenance records, have an independent mechanic inspect the vehicle, and run a vehicle history report to check for prior accidents or title issues.
Does the B-Class E-Cell have NHTSA crash test ratings?
NHTSA has not published crash test ratings for the 2014 Mercedes-Benz B-Class E-Cell. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.
Data from NHTSA federal complaints database. 21 complaints analyzed. Data confidence: low. Last updated: 2026-05-23.