Dec 15, 2025Transmission & drivetrainElectrical systemFuel system
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. Mercedes Benz USA and the MB Scottsdale dealership have refused to cover the cost of a repair (near $7,000) or replace the vehicle (that is completely inoperable). I was disturbed to learn that a failure rate to the Large Drive Module is ONE HUNDRED PERCENT. This same problem exists for early Toyota RAV4 EVs and some Teslas. I encourage you to go to [XXX] to confirm the facts. These vehicles should be recalled. Consumers like me should not have to shoulder the expense due a defect that the manufacturer should cover/resolve. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI 11705166
Dec 15, 2024Electrical systemFuel system
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 ODI 11630844
Oct 1, 2023Transmission & drivetrainEngineFuel system
At 23,596 total vehicle mileage, the electric drive motor failed while driving. This occurred two days and less than 50 miles after having an annual service performed at an authorized Mercedes Benz dealership. Failure resulted in sudden loss of power alternating with full torque power at any throttle position making the car uncontrollable and hazardous to the occupants and other cars/occupants on the road. No warning indicators, vibrations, or unusual sounds noticed prior to failure. Problem confirmed at the dealership that drive motor had failed. Drive motor produced by Tesla, with Tesla retaining the "core" motor.
NHTSA ODI 11547557
Jun 10, 2022Transmission & drivetrainFuel system
the electric motor has suffered a coolant leak. this is a known issue in the Mercedes B250e, Rav4 EV, and Tesla Model S. This issue should be recalled and repaired.
NHTSA ODI 11468727
May 24, 2022Transmission & drivetrainFuel system
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 ODI 11465948