Mercedes GLB X247 (2019 – 2025)

Reliability score : 8.4/10

The Mercedes-Benz GLB (X247) is a premium compact crossover SUV introduced in late 2019. Positioned between the GLA and the GLC, it stands out in the compact luxury segment due to its boxy, utilitarian design and the rare option of a third-row seat (making it a 7-seater). Built on the MFA2 (Modular Front Architecture) platform, it shares its underpinnings with the A-Class and GLA but offers significantly more practicality. A mid-cycle facelift was introduced in 2023, bringing updated front and rear fascias, the latest generation of the MBUX infotainment system, and the integration of 48V mild-hybrid (MHEV) technology for petrol engines. Overall Rating: The GLB is highly regarded for its space efficiency and ride comfort. The diesel variants (OM654q) are particularly well-suited to this veh

✅ Strengths

Exceptional space utilization: one of the few compact SUVs offering 7 seats.
OM654q diesel engines are highly refined, torquey, and perfectly suited to the vehicle's weight.
High-quality interior design with the impressive MBUX dual-screen setup.
Comfort-oriented ride quality, especially with standard suspension or adaptive dampers.
Excellent outward visibility due to the boxy, upright greenhouse.

⚠️ Weaknesses

Third-row seats are strictly for children (passengers under 1.68m / 5'6").
Wind noise becomes noticeable at highway speeds due to the upright, boxy aerodynamics.
1.33L petrol engines (GLB 180/200) feel underpowered when the vehicle is fully loaded.
Interior build quality can be inconsistent: creaks and rattles from door panels and dashboard are common.
No Plug-in Hybrid (PHEV) option available.

🎯 Verdict

The Mercedes-Benz GLB is arguably the most practical vehicle in the brand's compact lineup. If you are buying in Europe or a market where diesels are available, the GLB 200 d (OM654q) is the absolute sweet spot. It provides the perfect balance of torque, reliability, and fuel economy required to move this boxy SUV, especially if you plan to use the 7 seats or carry luggage. Avoid the diesel only if your driving profile consists strictly of short, urban trips, as this will inevitably lead to DPF and EGR issues. In that case, the GLB 200 (1.33L petrol) is adequate, though the GLB 250 (2.0L petrol) is highly recommended for a smoother, more effortless premium experience. When buying used, prioritize models with a documented service history, particularly concerning transmission fluid changes and AdBlue system maintenance.