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Electrical systemPart report

2017 Mercedes-Benz B 250E Electrical system Problems

Complaints
8about this part
Share
40%of 20 total for the year
Median mileage
16,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 8 complaints about the electrical system of the 2017 Mercedes-Benz B 250E, 40% of the 20 complaints for this model year. Where a mileage was given, the median is 16,000 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“When trying to leave a shopping complex in my Mercedes Benz B250e, the vehicle suddenly just wouldn't move in either drive or reverse. All instruments looked normal, there were no warnings or messages on the console, and the vehicle was fully charged, but the electric motor just would not engage even though the transmission was engaged. The vehicle was towed to the nearness Mercedes Benz dealership in Littleton, where they diagnosed the problem simply as a failed electric drive . …”

NHTSA complaint #11468355, filed 2022-06, 16,000 miles

“While driving a notice to park the car and call for maintenance came up then while I was trying to get to safe stopping point the car went on to neutral and shut down while I was at speed. I turned the car back on and moved it to safety and called for roadside assistance”

NHTSA complaint #11630844, filed 2024-12

“Mercedes dealer indicated a coolant leak resulted in an electrical failure and required that I pay $18,000 to replace the motor system. This is a known issue, however. When I mentioned that this is a manufacturing defect affecting numerous b250e I was referred to Mercedes Benz USA. Mercedes Benz USA offered a $1000 discount towards repairs rather than waiving the cost entirely. There are no details or tools available by mercedes or others to diagnose and resolve this issue. I would like this vehicle recalled. …”

NHTSA complaint #11496946, filed 2022-12

“In November 2024, the vehicle indicated add coolant . The vehicle was brought to Mercedes Benz of Scottsdale for servicing. The dealership apparently added coolant without advising me that the B250-E has a 100% chance of failure to the Drive Unit / coolant intrusion unless a small part is replaced before coolant leaks into the inverter/entire engine. A few weeks later - the vehicle, while traveling on a highway, had a complete failure and essentially shutdown on moment's notice. It nearly caused a severe accident. …”

NHTSA complaint #11705166, filed 2025-12

“My car just stalled and was not able to move on the highway exit which caused a high risk for the safety of passengers and the safety of others. The car has been towed to a Mercedes Dealer in West Covina, California. and they indicate that the coolant leaked into the drive motor and caused the car to stop. Prior to this car stall, there was no warning lamp, messages, or other symptoms of the problem prior to the failure. After the car stalls on the street, a failure message appeared asking to send the car to the shop.”

NHTSA complaint #11553101, filed 2023-11

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2017840%

Other parts of the 2017 Mercedes-Benz B 250E

Engine
11 complaintsTransmission and drivetrain
10 complaintsFuel system
5 complaintsBrakes
1 complaintsOther or unknown
1 complaintsSeat belts
1 complaintsSuspension
1 complaintsVehicle speed control
1 complaints

← All problems reported for the 2017 Mercedes-Benz B 250E

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology