2015 Mercedes-Benz SL 3.0L Petrol · C2 THM

The Mercedes-Benz SL presents a stable and reassuring maintenance trend. The most recent MOT test on 24 October 2025 at 50,989 miles returned a clean pass with zero advisories or defects. This marks the fifth consecutive first-time pass in the recorded history, indicating no worsening mechanical or structural deterioration over the past four years. The vehicle has covered approximately 9,724 miles over the last four years, averaging roughly 2,431 miles annually during that window. Accumulation slowed notably between October 2024 and October 2025, when the odometer remained static at 50,989 miles. This suggests the car may have stood unused for an extended period. A stationary vehicle of this age can develop flat-spotted tyres, seized brake calipers, dried-out rubber bushings, and moisture ingress in the fuel or exhaust system, none of which were flagged in the October 2025 test but warrant physical verification. Despite the clean MOT record, a prospective buyer should still inspect the underside for corrosion, particularly around suspension mounting points, subframes, and sills. Low-mileage use does not eliminate the risk of surface rust on a vehicle now over a decade old. The tyres deserve close scrutiny. If the rubber dates back several years, perished sidewalls could be a hidden concern regardless of remaining tread depth. The braking system also merits a road test. A car that has sat idle can develop uneven disc wear or binding rear calipers, issues that a static inspection might miss. The exhaust system and DPF, if fitted, should be checked for efficiency. Short-trip use or prolonged standing can cause carbon build-up and condensation corrosion inside the silencers. Mechanically, the SL appears well cared for on paper. The absence of any advisories across five tests speaks to consistent upkeep. A hands-on inspection and extended test drive remain essential to confirm that the clean MOT history translates into sound day-to-day condition.