AI DamageMercedes-Benz B 250E: problems, complaints, bulletins
Summary for the Mercedes-Benz B 250E across 5 model years: 28 owner complaints and 37 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Engine 50% of all complaints
- 2 Powertrain 39% of all complaints
- 3 Electrical system 36% of all complaints
- 4 Fuel/propulsion system 18% of all complaints
- 5 Seat belts 11% of all complaints
- 6 Service brakes 7% of all complaints
- 7 Air bags 7% of all complaints
- 8 Steering 4% of all complaints
- Engine: 14 complaints (50% of all); manufacturer bulletins for this component: 2.
- Powertrain: 11 complaints (39% of all); manufacturer bulletins for this component: 13.
- Electrical system: 10 complaints (36% of all); manufacturer bulletins for this component: 19.
- Fuel/propulsion system: 5 complaints (18% of all).
- Seat belts: 3 complaints (11% of all).
Symptoms owners describe
How many of the 28 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 14 | 0 | 2 |
| Powertrain | 11 | 0 | 13 |
| Electrical system | 10 | 0 | 19 |
| Fuel/propulsion system | 5 | 0 | 0 |
| Seat belts | 3 | 0 | 0 |
| Service brakes | 2 | 0 | 3 |
| Air bags | 2 | 0 | 0 |
| Steering | 1 | 0 | 0 |
| Suspension | 1 | 0 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
| Exterior lighting | 0 | 0 | 24 |
| Visibility | 0 | 0 | 12 |
| Equipment | 0 | 0 | 11 |
| Structure | 0 | 0 | 9 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Stacy belts will not retract they remain in a loosened state and I am afraid they will not lock in an accident
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.
Seat Belt Malfunction: The childrenâs seat belts are not retracting properly, posing a significant safety risk. Braking Issues: Despite being told the brakes are at 90%, they feel like they are grinding metal. This is highly concerning.
My air bag light went on , and my car is displaying a fault on the drivers side air bag . I took the car to an authorized Mercedes dealer and they say they claim I need a new part . Please see RCMN-17V627 . The recall affects nearly 500,000 Mercedes-Benz vehicles from model years 2012 to 2018.
I exited the freeway and as soon as I stopped at the light for the off ramp a warning light indicator appeared stating Coolant Low. I found this odd as I was unaware of Electric Vehicles using Coolant. I clicked the OK button on the steering wheel and the message was acknowledged and disappeared from the screen.
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
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Complaint Clanking noise from the area of the speakers in the doors
- Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE
- Complaint A popup is seen on the HU with the message "data connection temporarily not available"
- Complaint Clanking noise from the area of the speakers in the doors
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,…
- Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD…
- Complaint The customer requests deactivation of the N112/9 HERMES communication module Note
- Complaint There are several types of complaint about noises or poor windshield wiper wiping performance
- Complaint Headlamp, front fog lamp leaky or fogged
- Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon,…
- Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon,…
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.