Mercedes-Benz SL-Class (R231)
Engines and transmissions

Model
Years
Type/code
Power at rpm, Torque at rpm
Transmission
SL 350
2012-2014
3,498 cc (213.5 cu in) V6 (M 276 DE 35)
306 PS (225 kW; 302 hp) at 6,500, 370 N⋅m (273 lbf⋅ft) at 3,500-5,250
7-speed automatic (7G-Tronic Plus)
SL 400
2014-2016
2,996 cc (182.8 cu in) V6 BiTurbo
333 PS (245 kW; 328 hp) at 5,250-6,000, 480 N⋅m (354 lbf⋅ft) at 1,600-4,000
7-speed automatic (7G-Tronic Plus)
SL 450
2017-
2,996 cc (182.8 cu in) V6 BiTurbo
367 PS (270 kW; 362 hp) at 5,250-6,000, 500 N⋅m (369 lbf⋅ft) at 1,600-4,000
9-speed automatic (9G-Tronic Plus)
SL 500 (SL 550 for NA)
2012-2015
4,663 cc (284.6 cu in) V8 BiTurbo (M 278 DE 46 AL)
435 PS (320 kW; 429 hp) at 5,250, 700 N⋅m (516 lbf⋅ft) at 1,800-3,500
7-speed automatic (7G-Tronic Plus)
SL 500 (SL 550 for NA)
2016-
4,663 cc (284.6 cu in) V8 BiTurbo (M 278 DE 46 AL)
455 PS (335 kW; 449 hp) at 5,250, 700 N⋅m (516 lbf⋅ft) at 1,800-3,500
9-speed automatic (9G-Tronic Plus)
SL 63 AMG
2012-14
5,461 cc (333.3 cu in) V8 BiTurbo (M 157 DE 55 AL)
537 PS (395 kW; 530 hp) at 5,500, 800 N⋅m (590 lbf⋅ft) at 2,000–4,500 AMG Performance Package: 564 PS (415 kW; 556 hp) at 5,500, 900 N⋅m (664 lbf⋅ft) at 2,250–3,750
7-speed (AMG SPEEDSHIFT MCT)
SL 63 AMG
2015-
5,461 cc (333.3 cu in) V8 BiTurbo (M 157 DE 55 AL)
585 PS (430 kW; 577 hp) at 5,500, 900 N⋅m (664 lbf⋅ft) at 2,250–3,750
7-speed (AMG SPEEDSHIFT MCT)
SL 65 AMG
2012-
5,980 cc (365 cu in) V12 BiTurbo (M 279 E 60 AL)
630 PS (463 kW; 621 hp) at 4,800–5,400, 1,000 N⋅m (738 lbf⋅ft) at 2,300–4,300 (limited)
7-speed automatic (AMG SPEEDSHIFT PLUS 7G-TRONIC)

Question: Which two models of Mercedes-Benz SL-Class (R231)variants was paired with AMG's SPEEDSHIFT MCT 7-speed transmission
Answer: The Mercedes-AMG SL63 (577 hp (430 kW; 585 PS)) and SL65 (621 hp (463 kW; 630 PS)) variants paired with AMG's SPEEDSHIFT MCT 7-speed transmission.