2023 Mercedes-Benz EQB 300

The 2023 Mercedes-Benz EQB 300 4MATIC is an all-electric SUV that offers a blend of luxury, practicality, and modern technology. The EQB 300 features a dual-motor setup producing 225 horsepower and 288 lb-ft of torque, providing all-wheel drive capability. There is another model available called the EQB 350 that makes 288 horsepower and 391 lb-ft of torque. Owners often praise the EQB for its spacious interior, comfortable ride, and advanced safety features. However, some common dislikes include the range limitations compared to gasoline vehicles, the sometimes-complex infotainment system, and the higher price point compared to non-luxury EVs. Electric Motor

Dual Motor (225hp/288 lb-ft)

• Inverter Failure
  • Description/Symptoms: Vehicle may display a warning message related to the electric drive system. Reduced power or complete loss of propulsion can occur. Diagnostic codes related to the inverter may be present.
  • Solution: Replacement of the faulty inverter.
  • Estimated Cost to Fix: $4,000 - $6,000+
• Reduced Range
  • Description/Symptoms: Many owners have reported that their EQB 300 struggles to reach the range advertised by Mercedes. Range is also significantly impacted by weather.
  • Solution: There is no definitive solution to this issue. Mercedes can inspect the vehicle and replace parts if they are found to be defective. The car can also be driven conservatively to conserve the battery.
  • Estimated Cost to Fix: $0 (if under warranty and no defective parts are found)

Battery

• Premature Battery Degradation
  • Description/Symptoms: Noticeable decline in battery capacity and range over a relatively short period. This can be verified by comparing the current range to the original range and by diagnostic scans of the battery management system.
  • Solution: If the degradation is excessive and beyond the normal range, battery module replacement or full battery pack replacement might be necessary under warranty.
  • Estimated Cost to Fix: Warranty Coverage (Outside of warranty: $15,000 - $20,000+)
  • Recalls: None Found

Electrical System

• MBUX Infotainment System Freezing/Lagging
  • Description/Symptoms: The Mercedes-Benz User Experience (MBUX) system can become unresponsive, lag during operation, or freeze entirely, requiring a restart.
  • Solution: Software updates from Mercedes-Benz often address these issues. In some cases, replacement of the MBUX unit may be required.
  • Estimated Cost to Fix: Software update: $0 (if performed during service). MBUX unit replacement: $1,500 - $2,500+
  • Recalls: None Found
• 12V Battery Drain
  • Description/Symptoms: The vehicle’s 12V auxiliary battery can drain prematurely, leading to starting problems or electrical malfunctions. This is often due to software glitches or parasitic drain from various systems.
  • Solution: Software updates to address parasitic drain. In some cases, 12V battery replacement is required.
  • Estimated Cost to Fix: Software update: $0 (if performed during service). 12V battery replacement: $200 - $400
  • Recalls: None Found
• Charging Port Issues
  • Description/Symptoms: Failure to initiate charging, slow charging speeds, or error messages related to the charging port.
  • Solution: Inspection and possible replacement of the charging port or related charging system components. Software updates may also address some charging issues.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Exterior

• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: Parking sensors may provide false alerts or fail to detect objects. Blind spot monitoring may be inaccurate or non-functional.
  • Solution: Diagnosis of the affected sensors and replacement if necessary. Recalibration of the sensor system may also be required.
  • Estimated Cost to Fix: $300 - $800+ per sensor
  • Recalls: None Found

Interior

• Seat Motor Failure
  • Description/Symptoms: The electric motors that control seat adjustments may fail, resulting in the inability to adjust the seat position.
  • Solution: Replacement of the faulty seat motor.
  • Estimated Cost to Fix: $500 - $1,000+
• Sunroof Issues
  • Description/Symptoms: The sunroof may fail to open or close properly, or may leak water.
  • Solution: Inspection and possible replacement of the sunroof motor, seals, or entire assembly.
  • Estimated Cost to Fix: $800 - $2,000+

Summary

The 2023 Mercedes-Benz EQB 300, while lauded for its interior space and electric powertrain, exhibits several common issues. Electrical problems, including MBUX glitches, 12V battery drain, and charging port malfunctions, are prominent. Issues with the electric motor and premature battery degradation can lead to expensive repairs. Exterior sensor malfunctions and interior component failures (seat motors, sunroof) further contribute to potential ownership costs. The severity of these issues ranges from minor inconveniences to potentially costly repairs, making thorough pre-purchase inspections and awareness of warranty coverage crucial.