Mercedes-Benz SL500 facelift roadster is extra strong with Mercedes engines This facelifted variation of the Mercedes-Benz SL500 used to be given a makeover early in 2016 along with every different model in the SL roadster line-up. With 449bhp the SL500 is the extra strong of the two ‘standard’ SL-classes, the other being the 362bhp SL400. […]