2012 Mercedes-Benz SL 4.7L Petrol · SA51 AEA

The SL is powered by a 4.7‑litre V8, which typically yields around 15‑18 mpg (imperial) in mixed driving, so fuel costs will be a significant part of the annual outlay, especially with current fuel prices. Road tax for a 4.7‑litre petrol engine falls in the higher bands (currently £560 per year), and the insurance group is usually in the 30s, leading to higher premiums for a 14‑year‑old sports car.

Maintenance on a Mercedes SL can be expensive; routine servicing, oil changes, and occasional major services (e.g., timing chain or valve clearance) often run £400‑£600 per visit. Adding estimated fuel (£1,500‑£1,800), tax (£560), insurance (£800‑£1,200) and routine maintenance (£500‑£700) gives an annual running cost in the region of £3,300‑£4,200.

Inspect the brake system closely: the MOT advisories highlighted thin front pads, a worn front disc and thin rear pads, so check pad thickness, disc condition and any uneven wear that could indicate caliper issues. Verify that the rear tyre's cut has been repaired or the tyre replaced, as a compromised tyre can affect safety and handling.

Examine the convertible roof mechanism for smooth operation and any signs of leaks, as roof repairs on the SL can be costly. Also, given the high mileage, listen for any engine noises, check for oil leaks, and confirm that the transmission shifts smoothly. A thorough test drive should reveal any abnormal vibrations or electronic glitches, which are common areas of concern on older Mercedes convertibles.