Finding the ideal luxury sports car is a Goldilocks proposition: cars that fulfill either descriptive – luxury or sports – are piled high as Annapurna. For instance, the Ferrari F430 is a luxurious sports car, but it's not a luxury car. The current CL63 is a sporty luxury car, but it's not a sports car. Try to find a conveyance in which the little girl with the golden locks would sigh "This one is just right" – a car that has the sporting reflexes to keep her heart beating and a cabin supple enough for her to unwind in when the twisties are finished – and you see the field is disturbingly minuscule. Against all odds, the SL63 is that car: Goldilocks' Golden Mean