1987 Mercedes-Benz 300 3.0L Petrol · ROH 1

The 2.96‑litre petrol engine in the 1987 Mercedes 300 is relatively thirsty by modern standards, with real‑world fuel consumption typically around 18‑22 mpg (≈13‑15 l/100 km). Road tax for a vehicle of this age and engine size falls into the higher band, currently £210 per year. Insurance groups for classic Mercedes models often sit in the mid‑range (group 30‑35), leading to annual premiums of roughly £500‑£700 depending on the driver’s profile.

Maintenance on a vehicle of this vintage can be higher than for contemporary cars, especially if specialist parts or workshop time is required. Routine servicing, oil changes, and brake work may cost £300‑£500 per year, while any major suspension repair (such as replacing the dust cover) could add another £200‑£400. Taking fuel, tax, insurance and typical maintenance together, an estimated annual running cost would be in the region of £800‑£1,200.

Focus first on the off‑side front lower suspension arm and its ball‑joint dust cover, as this component was recorded as severely deteriorated in both the 2025 and 2026 MOTs. Check for any signs of rust, wear, or looseness, and confirm whether the dust cover has been replaced or if cracks are present that could affect suspension integrity.

Inspect the overall condition of the chassis and suspension bushings, given the vehicle's age. Look for corrosion on other suspension arms, steering components, and mounting points, as rust can spread and cause further failures. Verify the condition of the brakes, steering rack, and wheel bearings, which are not reflected in the MOT record but are critical for safe operation.

Finally, examine the engine bay for any oil leaks, worn belts, or signs of overheating. The 2.962‑litre engine, while robust, can develop timing chain or valve train wear in older cars. Ensure the cooling system (radiator, hoses, thermostat) is in good order, as age‑related degradation can lead to costly repairs.