Mercedes-Benz B-Class2018

Known issues

• DPF regeneration problems and clogging, particularly on vehicles with low annual mileage or short trips; can result in limp mode and expensive cleaning/replacement (€800–€1,500)
• Electrical faults including infotainment system freezes, door lock actuator failures, and battery drain issues due to complex electronics
• Timing chain tensioner wear on diesel units, leading to rattle on cold start; eventual failure can cause serious engine damage
• Exhaust gas recirculation (EGR) valve carbon buildup, causing rough running and increased emissions
• Dual-mass flywheel premature wear on manual gearboxes, resulting in vibration and grinding
• Turbocharger boost sensor faults causing reduced power and warning lights

Good for

• Fuel economy for a family MPV; real-world combined economy typically 45–52 mpg under normal conditions
• Spacious interior with flexible seating and good boot space for family use
• Comfortable highway cruising and well-tuned suspension for a practical vehicle
• Solid build quality and good safety ratings despite electrical complexity