2014 Mercedes-Benz E 2.1L Diesel · MW 201

The 2.1-litre diesel engine in the E-Class is renowned for strong fuel economy, typically returning 55-65 mpg on a mixed driving cycle with a real-world figure of around 50 mpg for most owners. Road tax for a 2014 Euro 5 diesel of this engine size is £165 per year, though you should confirm the exact CO2 figure from the V5C. Insurance for the E-Class typically falls into group 30-38 depending on the specific trim, putting it in the higher bracket for executive saloons.

Annual maintenance costs are moderate to high for this class of vehicle. A full Mercedes-Benz service will run £400-£600, while specialist independent servicing can be £250-£400. Brake fluid, coolant, and gearbox oil changes add up. For a 12-year-old E-Class diesel with 76,000 miles, budget approximately £800-£1,200 per year for combined fuel, tax, insurance, and routine maintenance, excluding any major repairs. The 2.1-litre diesel is generally cheaper to maintain than the larger 3.0-litre V6 variants, which is a point in its favour.

Begin any inspection by physically examining both front coil springs — even though the most recent test passed, a fractured spring can develop between tests, particularly over winter months with road salt exposure. Push down firmly on each front corner and listen for creaking or clunking noises, which indicate worn springs or top mounts. If either spring appears shorter than the other or shows signs of corrosion, budget for replacement immediately.

The 2025 MOT noted corrosion on the rear brake discs, so inspect these carefully. Light surface rust that disappears after a few brake applications is normal, but deep pitting or excessive lipping on the disc edge indicates the discs need replacement. Check the rear tyre tread depth and confirm even wear across both tyres, as the 2025 advisory noted 3mm remaining. Uneven wear could point to alignment or suspension geometry issues, which would also accelerate coil spring fatigue.

For the 2.1-litre OM651 diesel engine, listen for any rattle on cold start which could indicate timing chain stretch — a known issue on higher-mileage examples. Check for oil leaks around the turbo and from the oil filter housing, and ensure the cooling system has been maintained as overheating can cause head gasket problems. Verify the AdBlue system is functioning, as failures here typically trigger dashboard warnings and can prevent the car from starting if ignored.