2015 Mercedes-Benz SL63 (R231)

The SL63 AMG has spanned two generations. The R230 (2008-2011) used the 6.2-litre M156 with 518hp. The R231 (2012-2020) initially used the M157 5.5-litre twin-turbo (537hp) before receiving the M177 4.0-litre twin-turbo. Both offered extraordinary performance in a luxurious convertible package.

Engine: M156 (R230) - head bolt recall. M157/M177 (R231) - turbo and oil leak concerns. ABC: Standard - expensive. Roof: Complex mechanism. General: R231 generally more reliable. Full history essential.

AMG Performance Package, Carbon fibre trim, Designo, Bang & Olufsen audio (R231), Full history