Most common 2014 Mercedes-Benz B-Class Electric problems
Share of the 20 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz B-Class Electric complaints by model year
Best B-Class Electric years: 2016. Years to avoid: 2015. Compare all years →
2014 Mercedes-Benz B-Class Electric recalls (2)
Communication
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially relaying an inaccurate vehicle location.
Remedy: MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge.
Electrical system › Propulsion system › Traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain model year 2014-2015 B-Class Electric Drive vehicles manufactured November 21, 2013, to May 26, 2015. Due to a communication error within the electric drive system, the electric powertrain unit may shut down, temporarily immobilizing the vehicle and resulting in a loss of…
Remedy: MBUSA will notify owners, and dealers will update the electric drive system software, free of charge. The recall began on December 2, 2015. Owners may contact MBUSA customer service at 1-800-367-6372.
NHTSA defect investigations
Federal safety investigators have looked into 2 possible defects involving the 2014 Mercedes-Benz B-Class Electric:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles.
What 2014 Mercedes-Benz B-Class Electric owners say
Transmission & drivetrain
The contact owns a 2014 Mercedes-Benz B-Class Electric Drive. The contact stated that after stopping at a stop sign, the vehicle lost motive power before the "Malfunction visit workshop" and "Stop switch engine off" messages were displayed. After restarting the vehicle, the vehicle returned to normal functionality; however, the failure recurred more frequently. No warning lights were illuminated. The vehicle was towed to the dealer and diagnosed with an electric drive motor failure. The contact was informed that the electric drive motor needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. After investigating the failure, the contact related it to technical service bulletin 2015070002. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 62,700.
Motor suddenly stopped on highway. This was extremely dangerous. Vehicle transported to Mercedes Benz, they have indicated the electric drive motor has failed. This is the second drive motor in this car that has failed in only 48K miles. We have two of these cars, same year and model. The motor has also failed in the other vehicle. There is an entire Facebook group talking about failures of the drive units in these cars. PLEASE FORCE MERCEDES TO DO SOMETHING!
Electrical system
In preparing to leave a parking lot on November 23, 2016 in hillsboro, oregon, the b-Class Mercedes-Benz Electric drive automobile refused to move and a message appeared in the instrument panel saying "have me towed to a dealer" or somesuch. Vehicle was transported to beaverton, oregon Mercedes-Benz where the diagnosis was a defunct main traction battery. Battery, which costs about 90 percent of the msrp of the automobile, was ordered from Germany and arrived on or about December 9, 2016 as a warranty replacement. Vehicle is reported to be ready for pick up on December 15. No accident was involved, though had the traction battery ceased to provide power while the vehicle was in motion, the outcome might have been different. No indication of impending battery failure was noted. …
Tl* the contact own a 2014 Mercedes Benz b-Class Electric. The contact stated while his wife was driving 55 MPH, an unknown yellow warning light illuminated indicating assistance required. The driver continued to drive the vehicle and shortly after, while attempting to park on the side of the road, another red warning light was illuminated and the vehicle stalled. The vehicle was not drivable. The vehicle was towed to the local dealer Mercedes-Benz of alexandria (200 s pickett st, alexandria, va 22304, [phone]) where it was diagnosed with needing the drivetrain to be replaced. The vehicle had been repaired however, the failure recurred. The vehicle was towed to euro motorcars appearance center (4932 bethesda ave, bethesda, md 20814, [phone]) where it was diagnosed with needing the drivetrain to be replaced. The vehicle was not repaired. …
Engine & cooling
On September 20th, 2018, the car suffered a sudden and abrupt catastrophic shut down while I was driving my son to school. We were on city streets driving straight at normal speed and it stalled right in an intersection but I was lucky to be able to still have some momentum to get into the left turn lane. There was a flashing red text warning on the display for a few seconds- something about turn off immediately and do not restart. Then the car shut down. I was terrified that we would get into an accident all throughout the time we had to wait for the tow truck. If this had happened on the freeway, it would have been disastrous. Note that the Electric drive unit on this car was replaced on the following dates: 3/5/18 - 3/15/18(10 days to repair) 9/20/18- 10/3/18 (14 days) on 10/10/18 the car suffered another "malfunction visit workshop" and has been in the repair shop since 10/11/18. …
The "malfunction" light appeared and vehicle lost power immediately. After coming to a complete stop, then switching the ignition off and back on again, the car operated normally and the "malfunction" light disappears. This occurred three times: during highway driving (55 MPH), on a country road (45 MPH), and at almost a stop (5 MPH). One occurrence was in the early evening on a hot day and two were early in the morning when temperatures were cool. Two of these failures were very dangerous circumstances and it is very lucky that no one was nearby on the road at that time. Since it is a fully Electric car it loses momentum very quickly and I had to desperately look for a turnout at once. One time my two young children were in the back seat of the car. Mercedes Benz dealership diagnosed the cause to be the drive unit at a cost of $9,000. …
2014 Mercedes-Benz B-Class Electric engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined | Range |
|---|---|---|---|---|
| Electric | Single-speed | FWD | 85 / 83 / 84 MPGe | 87 mi |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2014 Mercedes-Benz B-Class Electric a good car?
Based on 20 owner complaints filed with NHTSA, the 2014 B-Class Electric rates average: 1.3× as many complaints as a typical year of the B-Class Electric at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2014 Mercedes-Benz B-Class Electric?
The transmission & drivetrain — 10 complaints, 50% of all complaints for this model year. Next are the electrical system (7) and engine & cooling (7).
How many recalls does the 2014 Mercedes-Benz B-Class Electric have?
There are 2 recalls for the 2014 Mercedes-Benz B-Class Electric, the most recent from November 1, 2019 (communication). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mercedes-Benz B-Class Electric?
The best years by complaints, compared at the same age, are 2016. Years to avoid or approach with caution: 2015. See the full Mercedes-Benz B-Class Electric years comparison.
At what mileage do 2014 Mercedes-Benz B-Class Electric problems happen?
The median mileage reported in complaints is about 28,000 miles; 81% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.