Mercedes-Benz EQB 350 4MATIC
Electric drivetrain on MFA2 platform, identical to the EQA. Optionally available as a 7-seater. Same battery pack (66.5 kWh), same drivetrain technology.
Electric Confidence
215 kW electric drive provides adequate propulsion. Quiet and comfortable, not exciting.
Engine Weaknesses 5
EQB with 70.5 kWh Farasis battery (build 12/2021–01/2024) is capable of fire through internal cell short circuit. 51,729 vehicles worldwide. Fix: complete battery replacement.
Symptoms: No driver symptoms before fire. Recall notification by post.
Some EQB 250 units with the 70.5 kWh battery (Farasis cells, MY 2022–2024) abort fast charging with a 'drivetrain fault' message. In severe cases, complete HV battery replacement is required.
Symptoms: Charging stops suddenly at 20–60% state of charge, display shows 'drivetrain system fault', vehicle still drives, further charging attempts fail
Insufficient coolant circulation in the HV battery circuit. In the event of overheating the system throttles drivetrain output.
Symptoms: Sudden power reduction in heat or during fast charging. Coolant warning messages on display.
The 12V auxiliary battery discharges during extended standstill. More frequent on vehicles with many networked functions. Software update helps in many cases.
Symptoms: Vehicle cannot be unlocked/started, 12V warning
Multiple EQB owners report rear doors not correctly adjusted, requiring excessive closing force. The problem occurs sporadically. Workshop corrections are possible but relapses have been documented.
Symptoms: Rear doors require noticeably more force to close, doors don't close fully flush, wind noise at higher speeds
Vehicle Weaknesses 6
Recall for EQA and EQB due to short-circuit risk in the high-voltage battery. Vehicles have caught fire in China. HV battery is replaced completely.
Faulty torquing of the brake caliper housing results in reduced braking effect and can cause brake fluid loss.
Fault in HV battery (Farasis cells) can cause short circuit and vehicle fire. 51,729 vehicles worldwide affected (2021–2024), 4,677 in Germany. KBA 14775R/16136R.
The electric charge port lock no longer works reliably. Connector is not latched or cannot be removed.
Numerous EQA and EQB vehicles show wind noise from approximately 80 km/h, typically asymmetric on the driver's side. Door realignment by workshop often necessary.
The optional heat pump generates an audible droning at temperatures below 0°C. Functionally no problem, only acoustically disturbing.
Reports & Tests
49 owner complaints filed with NHTSA (2021–2026). Most reported: Electrical (34), Other (12), Fuel System (8).