According to Britain's Autocar, the intended switch would result in performance gains for future SL models, while AMG stands to benefit from of development and production procurement. The closer relationship would also the next SL swapping its E-class derived architecture for the AMG's mostly all-aluminium double wishbone suspension and rear-mounted transaxle for better weight distribution.
Only expected to arrive in 2019, the new R233 SL will reportedly receive the GT's aluminium structure and carbon fibre tub to save weight, which could lead to the dropping of its trademark folding metal roof in place of a traditional fabric roof. A SL Coupe, the first since 1981, is also being mulled in relation to the standard roadster.
Up front, the R233 is expected to make use of Mercedes' recently launched turbocharged 3.0-litre straight six, which could also be feature a 15 kW battery for a mild hybrid drive layout. A development of the GT's 4.0-litre bi-turbo V8 will replace the current 4.7-litre mill, while the same M177 engine used in the new E63 is also being rumoured.
No word however exists if the SL will drop its signature V12 engine in the SL600 and AMG-SL65 for a smaller possible turbo V8.