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What 12 owners told NHTSA about the 2023 Mercedes-benz GLB

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (12)Engine (4)Transmission & drivetrain (3)Brakes (2)Visibility & wipers (2)Carry Handle, Shell, Base (1)Fuel system (1)Other/i Am Not Sure (1)

1 of 12 complaints match · Other/i Am Not Sure · clear filters

Jul 11, 2025Carry Handle, Shell, BaseOther/i Am Not Sure

Graco Turn2Me car seat is loosening over time when installed with the vehicle seatbelt and the SnugLock Lock-Off. The vehicle seat belt was also switched to a locked mode after proper installation and did not make a difference over time. The car seat continues to loosen over time to the point where it is moving more than an inch side to side at the belt path. This can cause injury to a child during a crash. Car seat has been installed with the assistance of certified Child Passenger Safety Technicians and Instructors on multiple occasions.

NHTSA ODI 11672721

Working with the data? Download all 12 complaints as CSV · fetched from NHTSA July 18, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2023 Mercedes-benz GLB verdict →