2007 Mercedes-Benz CLS 3.0L Diesel · SL07 DMZ

The most recent MOT test for this 2007 Mercedes-Benz CLS was conducted in 2026, though no record exists for that specific date within the provided history. The overall maintenance trend over the past decade is concerning, with multiple failures and advisories indicating persistent and worsening mechanical issues. The vehicle failed MOTs in 2021, 2022, and 2018, with major defects such as excessive wear in the front suspension arms and ball joints, a severely torn front tyre, and an excessively leaking oil system. These failures suggest that the vehicle has not received timely servicing or repairs, leading to progressive component failure and a growing risk of roadside breakdowns or safety hazards. The repeated oil leak advisories and near-excessive oil loss failures underscore a critical engine management concern, while the suspension arm failures point to long-term wear in the lower control arms and their associated bushings, which can lead to misalignment, uneven tyre wear, and reduced handling stability. The recorded mileage of 138,134 miles for a vehicle aged approximately 19 years represents a moderate annual usage rate of around 7,270 miles per year, which is within the expected range for a car of this age and class. However, the mileage data alone does not fully explain the vehicle’s condition, as lower mileage can sometimes reflect prolonged periods of inactivity, which may exacerbate issues like standing corrosion, fluid degradation, or component binding. Conversely, higher mileage could indicate more aggressive use, accelerating wear on consumables such as brakes, tyres, and suspension components. Given the frequency of MOT failures, it is plausible that the vehicle was driven less frequently than its wear history suggests, potentially leading to a buildup of hidden problems from prolonged idling or lack of regular servicing. To conduct a thorough inspection before purchase, the prospective buyer should prioritise checking the front suspension for binding or excessive play in the lower control arms and ball joints, particularly around the offside rear arm, where multiple failures were recorded. Listen for unusual clunking or rattling noises during a test drive, especially when negotiating bumps or cornering, as these may indicate worn suspension bushes or broken control arm components. Inspect the front tyres for uneven wear patterns, such as the inner and outer edge wear noted in the 2019 MOT, which could signal misalignment or suspension issues. The oil leak advisories and major failures suggest the engine may be losing oil through worn seals or gaskets; visually inspect the engine bay for oil stains and check the dipstick for consistent oil levels. If the vehicle has been stationary for extended periods, inspect the undercarriage for signs of corrosion, particularly around the wheel arches, exhaust system, and suspension components, as corrosion can compromise structural integrity. For fluid servicing, given the vehicle’s age and the potential for calendar-based degradation, the buyer should verify the last oil change date and ensure the engine oil and filter have been changed according to Mercedes-Benz’s recommendations—likely every 15,000 to 20,000 miles or annually, whichever comes first. The brake system should be inspected for signs of corrosion on the discs and linings, particularly on the offside front where calipers may be binding due to prolonged idling. Check the brake fluid reservoir for contamination or air bubbles, as this can lead to brake failure. The windscreen washer system, which failed in 2021, should be tested to ensure the reservoir is full and the washer fluid is clear, as a non-functional washer can impair visibility in adverse conditions. Finally, the battery should be checked for signs of corrosion or weak terminals, as older vehicles like this may struggle with starting if the battery has degraded from age or prolonged disuse. If the vehicle has been driven regularly, the wear on brakes, tyres, and suspension components may be more manageable, but the oil leak and suspension failures indicate that significant repairs will likely be required soon. A thorough pre-purchase inspection by a qualified mechanic is strongly advised to assess the extent of the damage and cost of future maintenance.