2004 Mercedes SL 3.7L Petrol · SL04 LET

The most recent DVSA MOT test for this 2004 Mercedes SL was conducted on 17 March 2026 and resulted in a pass with no defects or advisories recorded. Reviewing the preceding four examinations back to July 2022, each annual test has similarly returned a clean pass with no advisories or failures noted at any point in the available history. This consistent clean sheet across five consecutive tests is a reassuring indicator that the vehicle has been maintained to a roadworthy standard and that no recurring or progressive defects have been flagged by the testing authority. The stability of this pattern suggests the keeper has addressed any wear items proactively between tests, which is particularly important for a premium convertible of this vintage where component condition can deteriorate rapidly if neglected. With a recorded mileage of 13,485 miles over approximately 22 years, this SL has averaged just 613 miles per year, which is exceptionally low even for a luxury or weekend-use vehicle. Such limited annual usage strongly indicates the car has either been used very sparingly as a second vehicle, predominantly for fair-weather leisure driving, or has spent extended periods garaged and largely stationary. While low mileage generally preserves major mechanical components such as the engine, transmission, and drivetrain, prolonged standing can itself accelerate certain forms of degradation. The relatively short intervals between tests in calendar terms, combined with negligible mileage accumulation, means rubber, polymer, and fluid-based components are ageing through time rather than wear, which carries its own set of mechanical implications that warrant close physical inspection. Given the clean MOT history and the absence of any recorded advisories, there are no specific defect trends to investigate; however, a prospective buyer should carry out a series of age and standing-related checks appropriate to a 22-year-old vehicle with such low mileage. The tyres should be examined closely for sidewall perishing, cracking, and ozone damage, as rubber compounds degrade significantly after around six to seven years regardless of tread depth, and an unused or underused car is particularly prone to dry rot. All brake discs, especially on a vehicle that may have been stored for long periods, are susceptible to surface corrosion and the calipers may have developed sticking or binding pistons due to infrequent actuation, so a thorough test drive should include multiple firm brake applications from higher speeds to confirm even retardation without shudder, pulling, or noise. Similarly, the 12V battery, coolant, brake fluid, and power steering fluid are all subject to calendar-based degradation, and their age and service history should be verified, as fluid renewal intervals are typically time-bound rather than mileage-bound on low-use vehicles. Additional inspection priorities for this SL should include a careful examination of the underbody, jacking points, and structural areas for any corrosion that may have developed during storage, particularly in wheel arches, sills, and around suspension mounting points. The convertible roof mechanism, whether fabric or hardtop, should be operated fully to confirm smooth, complete operation, as roof hydraulics, seals, and electrical components on cars of this age are known to require attention and are not assessed during an MOT. The vehicle should also be raised to inspect the condition of the coil springs, suspension bushes, and anti-roll bar links for perishing or seizing from lack of use, and the test drive should be conducted over varied road surfaces to listen for any suspension clonks, knocks, or knocking from worn or dried-out bushes. Finally, verifying a comprehensive service history with evidence of regular time-based fluid changes, along with confirming the mileage recorded on the odometer against the MOT readings, will provide further confidence that this low-mileage example has been properly preserved rather than simply left standing.