What are the most common Mercedes-Benz GLB problems?
According to Au7o's analysis of 1,800+ owner reports, the 2025 Mercedes-Benz GLB has 5 documented issues. The most frequently reported are: 8G-DCT Transmission Shudder, 48-Volt Lithium-Ion Battery Reinitialization Communication Fault Draining the 12V Battery (Service Campaign 2025100004), MBUX Infotainment Freeze. None are rated critical, but regular maintenance is recommended.
Is the Mercedes-Benz GLB reliable?
The 2025 Mercedes-Benz GLB has 5 known issues documented across 1,800+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz GLB problems?
Repair costs for known Mercedes-Benz GLB issues range from $0 to $2,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2020-2025 Mercedes-Benz GLB 8G-DCT Transmission Shudder?
The 8G-DCT dual-clutch transmission exhibits shudder and hesitation during low-speed maneuvers and from a standstill. While improved over the earlier 7G-DCT, the 8G-DCT still uses a wet clutch design that can judder when the clutch packs wear or the software calibration is outdat… Repairs typically run $150-$2,500. Severity: medium.
What is the 2024-2026 Mercedes-Benz GLB 48-Volt Lithium-Ion Battery Reinitialization Communication Fault Draining the 12V Battery (Service Campaign 2025100004)?
The facelifted GLB (2024 onward) gained a 48-volt mild-hybrid system with a second-generation belt-driven starter-generator (RSG), so the car now depends on a small 48V lithium-ion battery for engine restarts, coasting, and recuperation in addition to the conventional 12V battery… Repairs typically run $0-$600. Severity: medium.
What is the 2020-2025 Mercedes-Benz GLB MBUX Infotainment Freeze?
The MBUX system freezes, reboots, or displays glitches. Apple CarPlay and Android Auto connections trigger instability in the head unit, and the voice assistant ("Hey Mercedes") intermittently stops responding. Repairs typically run $0-$1,500. Severity: low.
What is the 2020-2025 Mercedes-Benz GLB Panoramic Sunroof Creak?
The panoramic sunroof develops creaking and popping noises, particularly in temperature extremes and over rough roads. The large glass panel flexes differently than the metal roof structure, creating friction at the seal interfaces. Repairs typically run $0-$400. Severity: low.
What is the 2021-2025 Mercedes-Benz GLB AMG GLB35 Front Brake Squeal Under Light Braking (TSB Pad Replacement and Bed-In)?
AMG GLB35 owners report a loud squeal from the brakes when coming to a stop under light pedal pressure, present from delivery and persisting well past the break-in period. The AMG uses a higher-friction pad compound on larger front rotors than the GLB250, and that compound plus t… Repairs typically run $0-$600. Severity: low.
