2017 Mercedes-Benz B 250E Transmission and drivetrain Problems
- Complaints
- 10about this part
- Share
- 50%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 10 complaints about the transmission and drivetrain of the 2017 Mercedes-Benz B 250E, 50% 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 stopped in traffic, the vehicle automatically shifted to neutral with no warning or notification. Happened twice within an hour during stop and go traffic.”
NHTSA complaint #11078964, filed 2018-03, 12,000 miles“The electric motor is destined to fail because of a coolant leak at the speed sensor. According to many accounts the motor will fail and lock up the system. My car has not yet failed but I fear an accident will happen depending on where it falls. My extended warranty from Endurance is no help as they denied coverage for the motor. I have no alternative transportation and am out $17000 on the car.”
NHTSA complaint #11490473, filed 2022-10“I was on a busy street and my car failed to move. I got a message stating do not start the car until you contact the dealer. After getting the car to Mercedes Benz of Arrowhead they told me that the drive motor is leaking coolant and is shorting itself out. This is an electric car - a 2017 Mercedes Benz B250e. After doing some research I found that this is a common issue with this model and that Mercedes knows about it.”
NHTSA complaint #11465948, filed 2022-05“Electric motor has a coolant line running through it that has developed a leak and is in the process of destroying the motor. This is apparently a known issue that affects all Mercedes E-Class Electric Drive, B250e, Toyota RAV4-EV and some early Tesla Model S cars that have this early type Tesla motor installed. If the motor is not replaced, it could seize. Our car has only 23K miles on it but is out of warranty. I checked the speed sensor on 1/16 and found lots of coolant leakage and evidence of motor abrasion (see attached picture). …”
NHTSA complaint #11502252, filed 2023-01Related service bulletins
- 11035005Jul 14, 2026Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of…
- 11025648Nov 15, 2025Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse…
- 11019018May 21, 2025Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse…
- 11013298Jan 16, 2025Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse…
- 10151943Jul 16, 20187G-DCT: Scratching noise when changing gear from D to R when transmission cold.
- 10205143Aug 15, 2016Clacking noises from the front axle area.
- 10167497Mar 4, 2014Transmission intermittently fails to shift, vehicle jolts in higher gears. The dual clutch transmission (DKG) control unit contains the stored FC 92177 or FC 92100 ("The shift…
- 10167510Feb 28, 2014The vehicle cannot be started The vehicle may start by itself shortly after the startup attempt with a delay, as the relay can be late closing. and/or The gear selection is…
- 10166986Feb 6, 2014Reverse gear cannot be engaged. The following fault code is stored in the dual clutch transmission (DKG) control unit: FC 074600 -> Pressure regulating valve 1 does not close or…
- 10166987Feb 5, 2014Transmission intermittently fails to shift, vehicle jolts in higher gears. The dual clutch transmission (DKG) control unit contains the stored FC 92177 or 92100 - The shift valve…
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2017 | 10 | 50% |
Other parts of the 2017 Mercedes-Benz B 250E
11 complaintsElectrical system
8 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