Mercedes-Benz GLB2020

Known issues

• DPF (diesel particulate filter) regeneration issues and premature clogging on low-mileage urban driving; requires quality diesel and regular motorway use
• Occasional turbocharger boost pressure sensor faults causing limp mode and warning lights
• AdBlue system corrosion and SCR catalyst degradation in damp Irish conditions; can result in expensive repairs (€1,500–€3,000)
• Electrical gremlins with touchscreen/infotainment freezing or requiring software updates
• Injector carbon build-up on direct injection engines when using lower-quality fuel or frequent short journeys
• Early gearbox shudder on manual downshift (dual-clutch 8-speed DCT variant) in cold conditions

Good for

• Spacious, practical interior with three rows of seating and excellent boot flexibility
• Proven OM654 diesel engine delivering strong torque (400 Nm) and real-world economy of 45–50 mpg on mixed driving
• Solid build quality and premium cabin materials; feels more upmarket than rivals in the segment
• Good visibility and comfortable driving position; efficient handling for an SUV of this size