2023 Mercedes-Benz EQB 300 4MATIC Problems, Recalls & Reliability
Verdict
AvoidComplaint Index
100/100
#1 most-complained of 4 EQB 300 4MATIC years
The 2023 Mercedes-Benz EQB 300 4MATIC ranks worst of 4 model years, with a Complaint Index of 100 and 54 NHTSA complaints, 72% tied to the Electrical System. It carries 4 recalls, all electrical/high-voltage battery related, making it the year to avoid within this model.
- Complaints
- 54
- Recalls
- 4
- Crashes / fires
- 1 / 0
- Injuries / deaths
- 0 / 0
- NHTSA overall rating
- Not rated
- EPA combined MPG
- —
Top 2023 Mercedes-Benz EQB 300 4MATIC problems
NHTSA owner complaints by component group. Groups with 15+ complaints have their own page.
- Electrical System39 (72%)
- Fuel System9 (17%)
- Other9 (17%)
- Engine6 (11%)
- Transmission & Powertrain5 (9%)
- Collision Avoidance & Cameras3 (6%)
- Brakes2 (4%)
- Airbags1 (2%)
- Lane Departure1 (2%)
- Seat Belts1 (2%)
What owners report
- Owners report sudden loss of power while driving, with the vehicle decelerating and failing to recharge at a charging station.
- Drivers describe unexpected hard braking and lane swerving triggered by a dashboard warning light, with no obstacles present.
- Some owners saw the SRS airbag warning appear soon after purchase, with dealers unable to give a repair timeline.
- Reported range fell well short of the advertised figure, especially in cold weather, prompting repeated service visits.
- Owners waiting on the high-voltage battery recall repair say replacement parts were unavailable and charging times got longer after the fix.
- One owner reported the rear windshield shattering spontaneously while the vehicle was parked.
2023 Mercedes-Benz EQB 300 4MATIC recalls
4 NHTSA recall campaigns list this model year.
- NHTSA 26V073000Feb 6, 2026Electrical System11,895 vehiclesPark Outside
Electrical system:propulsion system:traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 EQB 250+, 2022-2024 EQB 300 4MATIC, and EQB 350 4MATIC vehicles. The high voltage battery may fail internally and lead to a vehicle fire while parked or driving.
Risk: A vehicle fire while parked or driving can increase the risk of injury.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Also, owners are advised to only charge their vehicles to a maximum of 80% battery capacity until the remedy has been completed. Dealers will replace the high voltage battery, free of charge. Interim letters, notifying owners of the safety risk, were mailed March 13, 2026. Additional letters will be sent once the final remedy is available. This recall replaces recalls 25V050 and 25V894. Vehicles previously repaired under recall 25V050 or 25V894 will need to have the new remedy completed. Owners may contact MBUSA customer service at 1-800-367-6372. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning February 13, 2026.
- NHTSA 25V894000Dec 19, 2025Electrical System169 vehiclesPark Outside
Electrical system:propulsion system:traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 EQB 250, 2022-2023 EQB 300 4MATIC, and EQB 350 4MATIC vehicles. The high voltage battery may fail internally and lead to a vehicle fire while parked or driving.
Risk: A vehicle fire while parked or driving can increase the risk of injury.
Remedy: Owners are advised to only charge their vehicles to a maximum of 80% battery capacity until the repair has been completed. Vehicles previously repaired under Recall 25V050 will need to be repaired again. Dealers will update the battery management system software, free of charge. Owner notification letters were mailed February 6, 2026. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2025120005. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov on December 23, 2025.
- NHTSA 25V487000Jul 25, 2025Electrical System660 vehiclesPark Outside
Electrical system:propulsion system:traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022-2023 EQB 350 4MATIC, and EQB 300 4MATIC vehicles. The bus bar in the high voltage battery may be secured with incorrect screws, which can cause the system to have a sudden loss of drive power without warning.
Risk: A loss of drive power increases the risk of a crash.
Remedy: Owners are advised to park outside until the recall repair is complete. Dealers will inspect and replace the high-voltage battery as necessary, free of charge. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. Owner notification letters were mailed January 9, 2026. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2025080004.
See all 4 recalls for the 2023 Mercedes-Benz EQB 300 4MATIC →
2023 compared with other EQB 300 4MATIC years
Frequently asked questions
- Is the 2023 Mercedes-Benz EQB 300 4MATIC reliable?
- Based on NHTSA complaints and recalls, the 2023 EQB 300 4MATIC has the highest Complaint Index (100) of the 4 model years with data, and ranks worst overall with 54 complaints and 4 recalls.
- What is the biggest problem with the 2023 EQB 300 4MATIC?
- The Electrical System accounts for 72% of complaints (39 of 54), including power loss, dashboard warnings, and high-voltage battery issues tied to 4 recalls.
- Does the 2023 EQB 300 4MATIC have a recall?
- Yes, it has 4 recalls, all involving the Electrical System and the high-voltage battery, which NHTSA says may fail internally and lead to a vehicle fire while parked or driving.
- How does the 2023 EQB 300 4MATIC compare to other years?
- The 2023 model has a Complaint Index of 100 versus 33 for 2022, 67 for 2024, and 0 for 2025, making 2023 the worst-ranked year for this model.
- At what mileage do 2023 EQB 300 4MATIC problems usually appear?
- NHTSA data shows a median mileage at failure of 15,000 miles overall, with Electrical System complaints median at 10,000 miles and Brakes complaints at 20,000 miles.