2021 Mercedes-Benz A 1.9L Diesel · DJ21 CLW

The 2.0-litre diesel A-Class typically returns around 55-65 mpg in real-world driving, depending on whether it's the A180d or A200d variant, making it economical for longer commutes and motorway use. Road tax sits in a reasonable band thanks to Euro 6 AP compliance, though diesel vehicles do face some uncertainty around future urban charging zones. Insurance for the A-Class tends to be in groups 15-25 depending on the specific variant, so obtaining quotes before purchase is essential.

Routine servicing at a Mercedes dealership or specialist typically costs more than for mainstream brands, with annual services often ranging from £300-£500 depending on whether it's an interim or full service. Diesel-specific items like AdBlue top-ups, diesel particulate filter maintenance, and occasional injector servicing can add to costs over time. Estimated annual running costs including depreciation, insurance, tax, fuel, and servicing would be around £2,400-£3,200 for this vehicle.

Given the MOT history shows only one advisory about a child seat, there are no specific failure patterns to investigate, but general diesel A-Class concerns should be checked. Inspect the AdBlue system carefully — failure of the SCR system is a known issue on Mercedes diesels of this era and can result in the car not starting if ignored. Check the diesel particulate filter (DPF) for warning lights or recent regeneration issues, as DPFs on urban-driven diesels can clog prematurely.

Examine the underside of the vehicle for any signs of oil leaks, particularly around the engine and turbo area, and inspect the condition of the timing chain (if applicable to this engine variant). Verify that all dashboard warning lights clear properly on startup and that there are no stored fault codes — a diagnostic scan at an independent Mercedes specialist would be money well spent. Finally, check that the dual-clutch automatic transmission (if fitted) changes smoothly through all gears, as these units can develop shuddering issues if the fluid has not been changed regularly.