My 2023 Mercedes-Benz GLB 250 4MATIC, with approximately 70,000 miles, developed an intermittent Check Engine warning and began running rough and shaking during operation. The vehicle was taken to an authorized Mercedes-Benz dealership for diagnosis. The dealer confirmed a major engine problem and determined that the cylinder head assembly requires replacement. I am concerned that the failure of a major internal engine component on a vehicle of this age and mileage could create a safety risk, particularly because the vehicle was running rough and shaking while being driven and the Check Engine warning was intermittent. The vehicle is currently at the authorized Mercedes-Benz dealership and the cylinder head repair/replacement has begun. The dealer's documented diagnosis states: “Cylinder Head Assembly: Replace Cylinder Head.” I am reporting this issue because I believe the federal safety agency should be aware of this engine/cylinder-head failure and determine whether other 2023 Mercedes-Benz GLB 250 vehicles have experienced similar failures.
The worst 2023 Mercedes-Benz GLB 250 4matic problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine1
Recalls 1
Latches/locks/linkages: doors: lock
- What is wrong
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 CLA, 2019-2022 A-Class, 2022-2023 C-Class, 2024 CLE, 2020-2026 GLA/GLB, and 2023-2024 GLC vehicles. Please refer to MBUSA's recall report for specific model information. The micro-switch in the driver's door lock may corrode and fail to detect an open door, preventing the electronic parking brake or "Auto-Park" feature from engaging automatically. This may result in a vehicle rollaway.
- Risk
- A vehicle rollaway increases the risk of a crash or injury.
- Remedy
- Dealers will replace the driver's door lock, free of charge. Owner notification letters are expected to be mailed September 18, 2026. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. Owners may contact MBUSA customer service at 1‑800‑367‑6372. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning July 31, 2026.
Recall number 26V481000 · Recall details
Technical service bulletins for the 2023 Mercedes-Benz GLB 250 4matic 21
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz...
- Fuel/propulsion system
- Slight creaking noises when steering
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Radio station cover art does not refresh when switching stations
- Clanking noise from the area of the speakers in the doors
- Temporary no start condition with check engine light and multiple warning messages
- Intermittent shift feel or thud/clunk noise perceived, such as a brief jerk or transmission reaction...
- Customers may report one or more of the following: • Transmission malfunction message • Check engine light...
- Tailgate opens unintentionally
See all 21 bulletins for the 2023 Mercedes-Benz GLB 250 4matic
What 2023 Mercedes-Benz GLB 250 4matic owners say
Most recent owner complaints, unedited.
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Questions about the 2023 Mercedes-Benz GLB 250 4matic
Is the 2023 Mercedes-Benz GLB 250 4matic reliable?
Owners have filed 1 complaint about the 2023 Mercedes-Benz GLB 250 4matic, fewer than a typical GLB 250 4matic model year.
What is the most common problem with the 2023 Mercedes-Benz GLB 250 4matic?
Engine and cooling, with 1 complaint.
How many recalls does the 2023 Mercedes-Benz GLB 250 4matic have?
1 recall, covering latches/locks/linkages.
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