query: 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.