The Mercedes-Benz SL presents a clean MOT history, with the most recent test on 18 February 2026 at 33,926 miles passing without any defects. This consistency extends back through the 2025, 2023, 2022, and 2021 records, all of which also show no advisories or failures. The stability of these results suggests the vehicle has been well maintained in critical areas, with no signs of recurring mechanical issues or deferred repairs. The absence of even minor advisories—such as tyre wear, fluid leaks, or suspension wear—indicates either meticulous upkeep or, more likely given the mileage, that the car has been stored or used very lightly. For a vehicle of this age and specification, such a pristine MOT trail is uncommon and raises the possibility of limited real-world use, which could mask underlying wear.
The mileage progression is unusually low for a ten-year-old car, averaging just over 3,300 miles per year. Between December 2021 (17,754 miles) and December 2022 (20,218 miles), the annual increase was a modest 2,464 miles, while the jump from 2022 to 2023 (21,809 miles) was similarly restrained. The most recent 12-month period, from January 2025 (28,868 miles) to February 2026 (33,926 miles), saw an increase of just 5,058 miles—well below average for a daily driver. This pattern strongly suggests the SL has either been garaged for extended periods or used sporadically, which may have preserved mechanical components but could also mean some systems, such as the battery, idle seals, or rubber bushings, have not been regularly exercised. The lack of mileage accumulation is not inherently negative, but it does mean a buyer should verify that components like the battery, suspension mounts, and brake fluid have been recently serviced, as these can degrade even with minimal use.
Given the absence of MOT advisories or failures, there are no red flags to prioritise in a pre-purchase inspection. However, the low mileage history means certain areas should still be scrutinised. The suspension—particularly the coil springs, anti-roll bars, and bushings—should be checked for stiffness or cracking, as these can degrade over time even without heavy use. The brake system, including calipers, discs, and pads, should be inspected for corrosion or binding, especially if the car has been stored in damp conditions. The battery’s condition is critical; a vehicle with such low annual mileage may have a weakened battery that fails to hold charge. Additionally, the rubber seals around doors, windows, and the boot should be examined for perishing, as prolonged exposure to sunlight or moisture can cause them to harden or crack. Finally, while the MOT records show no issues, the exhaust system’s integrity—particularly the mounts and heat shields—should be verified, as rust or fatigue can occur regardless of mileage.
The buyer should also confirm the service history, as the MOT alone does not capture fluid changes, timing belt replacements, or other non-visible maintenance. The Mercedes-Benz SL’s age and the gaps between tests make it prudent to verify that critical services—such as the timing belt, water pump, and differential fluids—have been addressed on schedule. Without evidence of these, the vehicle’s long-term reliability cannot be fully assured. The clean MOT trail is a positive indicator, but the low mileage raises questions about whether the car has been genuinely preserved or simply underused. A thorough pre-purchase inspection by a Mercedes-Benz specialist would be advisable to confirm the absence of hidden wear.