2008 Mercedes-Benz E 3.0L Diesel · OY58 AAN

The 3.0-litre diesel engine in this E-Class should return a combined fuel economy of around 35-45 mpg depending on driving style, though real-world figures for higher-mileage examples often sit at the lower end. As a 2008 diesel, road tax will fall into the higher pre-March 2017 bands, meaning an annual VED cost that buyers should verify using the current DVLA rates based on the specific CO2 figure for this engine variant.

Insurance for an E-Class of this vintage typically sits in groups 30-40 depending on the exact trim, which means premiums are likely to be moderate to high. Parts costs for Mercedes are generally above those for mainstream brands, particularly for suspension components, electrical items, and interior trim. Typical annual maintenance for a vehicle of this age and mileage could include tyres, brake wear items, and occasional suspension refreshes.

Based on the data available, a reasonable estimate for total annual running costs would be in the region of £2,200-£2,800 per year, covering fuel, insurance, tax, and maintenance. This figure assumes average mileage and does not account for any major mechanical work that may arise given the vehicle's age.

Begin with a thorough inspection of the front suspension, focusing on the upper control arm ball joints that caused the November 2024 MOT failure. Even though the vehicle passed its two subsequent MOTs, check for any play, knocking, or uneven tyre wear that could indicate the components are wearing again. The subframe, anti-roll bar drop links, and lower control arm bushes are also worth examining closely on a high-mileage example.

The 3.0-litre diesel engine in this generation of E-Class is known for timing chain stretch on high-mileage examples, so listen carefully for any rattling on cold start and check for timing chain guides if accessible. Inspect for oil leaks from the OM642 engine around the injector area, the oil filter housing, and the rear main seal. Diesel particulate filters can also become clogged on vehicles used primarily for short journeys, so check for warning lights on the dashboard.

General inspection points include a thorough check of the automatic transmission for smooth shifting and any signs of slipping, particularly on the 7G-Tronic gearbox fitted to many of these models. Examine the bodywork for corrosion around the wheel arches, boot lid, and door bottoms, as Mercedes of this vintage are not immune to rust. Finally, verify that all electrical systems including the COMAND infotainment, climate control, and seat adjustment functions are operating correctly, as repairs can be costly.