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2017 Mercedes-Benz B 250E Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
20
Latest Dec 15, 2025
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
8
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
0

What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2017 Mercedes-Benz B 250E, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Engine

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.

11
reports

From owner reports, verbatim

On Wednesday [XXX] I was driving my electric vehicle to work. 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. When the Light changed to green I proceeded to turn towards my office. At the next traffic light a new message popped up stating see service agent before starting your car. I again found this odd as the car was already running and the message could not be acknowledged with the OK button on the steering wheel. I was 2 blocks from my office so I continued on to get the car out of traffic so it wouldn't be a safety hazard. 1 block later the message disappeared and I was stopped at the left turn lane light when the Car completely died. All lights and indicators came on the dashboard and the car was completely dead. A kind person pushed my car out of the street so I would not be in danger or blocking traffic. These 2 indicators on the way to the office where the first indicators that ever were shown prior to the car becoming inoperable. I had the vehicle towed to my certified MB mechanic and he diagnosed the issue within an hour of receiving the car. The drive Unit was damaged due to an internal leak in the drive unit. I contact MBUSA to file a complaint about the car and they notified me I had to have the car diagnosed by a MB Dealership. I had the car towed to MB of Laguna Niguel and they charged me 300 for initial Diagnosis. On October 3, 2024 I was informed by the service rep the car needed additional diagnostics to determine the issue fully. They needed an additional 590.00 to run the diagnostics. On October 7, 2024 I was informed the repairs would be 19,000.00 to repair this car that we only paid 20,000 for. This is a complete design defect and should be covered. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

NHTSA ID 11633846 · filed Jan 3, 2025

The contact owns a 2017 Mercedes-Benz B250E. The contact stated while driving approximately 60 MPH, the vehicle the lost automotive power and stalled. The message "Shut Off Immediately" was displayed. The vehicle was later towed to the residence. The cause of the failure was not yet determined. The local dealer was notified of the failure. The manufacturer was not yet contacted. The failure mileage was 72,000.

NHTSA ID 11618068 · filed Oct 4, 2024
All 11 reports naming engine

Powertrain (other)

Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.

10
reports

From owner reports, verbatim

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 ID 11705166 · filed Dec 15, 2025

On Wednesday [XXX] I was driving my electric vehicle to work. 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. When the Light changed to green I proceeded to turn towards my office. At the next traffic light a new message popped up stating see service agent before starting your car. I again found this odd as the car was already running and the message could not be acknowledged with the OK button on the steering wheel. I was 2 blocks from my office so I continued on to get the car out of traffic so it wouldn't be a safety hazard. 1 block later the message disappeared and I was stopped at the left turn lane light when the Car completely died. All lights and indicators came on the dashboard and the car was completely dead. A kind person pushed my car out of the street so I would not be in danger or blocking traffic. These 2 indicators on the way to the office where the first indicators that ever were shown prior to the car becoming inoperable. I had the vehicle towed to my certified MB mechanic and he diagnosed the issue within an hour of receiving the car. The drive Unit was damaged due to an internal leak in the drive unit. I contact MBUSA to file a complaint about the car and they notified me I had to have the car diagnosed by a MB Dealership. I had the car towed to MB of Laguna Niguel and they charged me 300 for initial Diagnosis. On October 3, 2024 I was informed by the service rep the car needed additional diagnostics to determine the issue fully. They needed an additional 590.00 to run the diagnostics. On October 7, 2024 I was informed the repairs would be 19,000.00 to repair this car that we only paid 20,000 for. This is a complete design defect and should be covered. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

NHTSA ID 11633846 · filed Jan 3, 2025
All 10 reports naming powertrain (other)

Electrical

Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.

8
reports

From owner reports, verbatim

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 ID 11705166 · filed Dec 15, 2025

On Wednesday [XXX] I was driving my electric vehicle to work. 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. When the Light changed to green I proceeded to turn towards my office. At the next traffic light a new message popped up stating see service agent before starting your car. I again found this odd as the car was already running and the message could not be acknowledged with the OK button on the steering wheel. I was 2 blocks from my office so I continued on to get the car out of traffic so it wouldn't be a safety hazard. 1 block later the message disappeared and I was stopped at the left turn lane light when the Car completely died. All lights and indicators came on the dashboard and the car was completely dead. A kind person pushed my car out of the street so I would not be in danger or blocking traffic. These 2 indicators on the way to the office where the first indicators that ever were shown prior to the car becoming inoperable. I had the vehicle towed to my certified MB mechanic and he diagnosed the issue within an hour of receiving the car. The drive Unit was damaged due to an internal leak in the drive unit. I contact MBUSA to file a complaint about the car and they notified me I had to have the car diagnosed by a MB Dealership. I had the car towed to MB of Laguna Niguel and they charged me 300 for initial Diagnosis. On October 3, 2024 I was informed by the service rep the car needed additional diagnostics to determine the issue fully. They needed an additional 590.00 to run the diagnostics. On October 7, 2024 I was informed the repairs would be 19,000.00 to repair this car that we only paid 20,000 for. This is a complete design defect and should be covered. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

NHTSA ID 11633846 · filed Jan 3, 2025
All 8 reports naming electrical

Fuel system

Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.

5
reports

From owner reports, verbatim

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 ID 11705166 · filed Dec 15, 2025

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 ID 11630844 · filed Dec 15, 2024

Too few reports in this category for a page of its own — they appear in the full complaint list.

Suspension

Reports naming suspension components — springs, struts, shocks, control arms and related hardware.

1
report

From owner reports, verbatim

Glad to have found this group on Facebook: https://www.facebook.com/groups/bclasselectric?sorting_setting=TOP_POSTS Here's my situation with my B-250e 2017 model with 38,000 miles. Bought from a used car dealership in California. Took it to Mercedes-Benz of South Bay. First, they had it for 2 months and could not diagnose the problem with the error messages. This is when it was still drivable. They escalated to MB USA and Germany. Finally, Germany told them what to do to remove the alert and it worked fine. I drove it for 80 miles and now the same alert came back. This time the engine would not start. After another 3 weeks with the dealership I get this: Technician found coolant entering the electric motor assembly, specifically at the rotor position sensor. Resolving this matter takes replacing the electric motor itself. Amount to resolve takes $17, 575+tax (replaces electric machine/electric motor). Conferred with warranty manager for potential extended coverage. There is no additional or extended coverage for this component. I owe $15K on car payments so clearly, I won't be getting it repaired for $18K+. Especially when I can't trust if their diagnostic is accurate after they haven't figured it out for 3 months. Totally lost trust in the brand of Mercedes-Benz. The only remaining warranty is the Tesla battery till 100K miles. They say Tesla doesn't support it anymore. That's not my problem. Mercedes-Benz has sold this lemon of a model to many people. They owe compensation to pay for this. Customers are NOT Research & Development cost. We expect a working product. And as this group has posted -- this is a systemic issue. Any lawsuits on this or recall? There needs to be for sure.

NHTSA ID 11467661 · filed Jun 5, 2022

Too few reports in this category for a page of its own — they appear in the full complaint list.

Driver assistance

Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.

1
report

From owner reports, verbatim

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ B250. WHILE DRIVING 65 MPH AND ACCELERATING, THE BRAKES WERE APPLIED BUT FAILED TO RESPOND. ADDITIONALLY, THE VEHICLE MADE AN ABNORMAL IRKING NOISE. THE VEHICLE WAS TAKEN TO A LOCAL DEALER (KEYES EUROPEAN, 5400 VAN NUYS BLVD, VAN NUYS, CA 91401), BUT THEY WERE NOT ABLE TO DUPLICATE THE FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE AND ADVISED THE CONTACT TO CONTINUE TO DRIVE THE VEHICLE. THE FAILURE MILEAGE WAS 1,000.

NHTSA ID 11048875 · filed Nov 28, 2017

Too few reports in this category for a page of its own — they appear in the full complaint list.

Seat belts

Reports naming seat belts, buckles, retractors and pretensioners.

1
report

From owner reports, verbatim

Motor failure after 50K mile. Car can only move and stop - move and stop. Need to replace Electric Engine Motor. Seat belt malfunction after 40K.

NHTSA ID 11480555 · filed Aug 22, 2022

Too few reports in this category for a page of its own — they appear in the full complaint list.

Brakes

Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.

1
report

From owner reports, verbatim

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ B250. WHILE DRIVING 65 MPH AND ACCELERATING, THE BRAKES WERE APPLIED BUT FAILED TO RESPOND. ADDITIONALLY, THE VEHICLE MADE AN ABNORMAL IRKING NOISE. THE VEHICLE WAS TAKEN TO A LOCAL DEALER (KEYES EUROPEAN, 5400 VAN NUYS BLVD, VAN NUYS, CA 91401), BUT THEY WERE NOT ABLE TO DUPLICATE THE FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE AND ADVISED THE CONTACT TO CONTINUE TO DRIVE THE VEHICLE. THE FAILURE MILEAGE WAS 1,000.

NHTSA ID 11048875 · filed Nov 28, 2017

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .