There are 390mm discs at the front clamped by six-piston calipers, with 350mm rear discs, for more sudden and aggressive braking. Sport ups the ante, leaning the balance rearward, stiffening the AMG Ride Control dampers, upping the steering weight and sharpening the throttle response. Then you have AMG Force S+, as first seen on the AMG 4-Door electric. Then your ears and buttocks will also be picking up incongruous internal combustion rumblings not unlike those of the M133 2-litre at idle. Poke the throttle and those rumblings rise and recede with an eight-bit crackle.