2004 Mercedes E320 3.2L Heavy oil · DXZ 2083

The most recent DVSA examination on 20 June 2026 resulted in a failure, which is a concern given the previous passing test in May 2025. Although the official records do not detail the specific reasons, the cluster of three failures within 2025 and 2026, interspersed with only one pass, suggests a deteriorating or unstable maintenance picture rather than a steady one. A single clean pass followed so soon by a failure can indicate that a repair was carried out to clear one issue but that further or underlying defects have since developed. For a prospective buyer, this pattern warrants particular caution and thorough pre-purchase inspection by a Mercedes specialist, since the absence of recorded defect details means the specific rectification work and any retest documentation should be obtained from the seller. Against a vehicle age of twenty-two years, the recorded mileage of 182,143 miles equates to an annual average of roughly 8,279 miles, which is broadly typical for its age and suggests steady, consistent usage rather than long periods of standing or exceptionally high motorway accumulation. This consistency is mechanically reassuring, as regular use tends to keep seals, brakes, and drivetrain components functioning, and prevents the corrosion issues that plague cars left idle. However, the diesel E320 of this generation is known for wear items such as injectors, turbo actuator mechanisms, and suspension components at this mileage band, and the high overall odometer reading means major items like the automatic transmission torque converter, engine mounts, and rear self-levelling suspension components will have either been replaced or will be approaching end-of-life service intervals. Given the three recent failures and the vehicle's age, a prospective buyer should commission an independent pre-purchase inspection with particular attention to areas commonly flagged on the W211 chassis, even though the MOT history itself carries no defect narrative. On a road test, listen carefully for any knocking or clonking from the front suspension, which would indicate worn lower control arm bushes, anti-roll bar drop links, or coil spring seats, and check that the steering remains precise without vibration through the wheel. The E320 CDI is also prone to failing on diesel-specific emissions readings, so ensuring the diesel particulate filter is functioning correctly and that no warning lights appear on the dashboard is critical. Listen for any transmission shunt or delay on initial take-off, inspect the rear air springs or self-levelling system for sagging, and verify the operation of the electronic parking brake and footwell brake light switch, both common W211 failure points. Complementing these targeted checks, a comprehensive age-and-mileage-appropriate inspection should include a careful examination of the tyres for sidewall perishing and cracking, which on a 2004 car can occur even with reasonable tread depth due to rubber degradation from age. Examine the brake discs for severe lipping or corrosion around the circumference, which would suggest binding calipers or infrequent use leading to juddering under braking. Test all electrical consumers including seat memory functions, sunroof operation, and the climate control, as complex Mercedes electrics of this era frequently develop faults. Verify that the service book contains regular stamps at appropriate intervals and that the timing belt and automatic transmission fluid have been changed on schedule, since these calendar-based services are often neglected on high-mileage vehicles. Finally, check the underside thoroughly for any evidence of fluid leaks from the engine sump, power steering rack, or rear differential, and ensure the 12V battery is holding charge, as a weak battery on this model can cause a cascade of obscure electrical faults.