A mid-cycle facelift was introduced in 2016 for the 2017 model year. Launched early 2016 in California, the revised SL400 featured a 3-litre 362 hp (367 PS) biturbo V6 mated, for the first time in the SL, to Mercedes' own 9G-Tronic PLUS 9-speed automatic transmission.
An SL500, with a 4.7-litre biturbo V8 producing 449 hp (455 PS), was likewise paired with the 9G-tronic PLUS transmission. The Mercedes-AMG SL63 577 BHP and SL65 621 BHP variants continued with virtually unchanged power trains, paired with AMG's SPEEDSHIFT MCT 7-speed sports transmission with claimed improved shift times.
