The refreshed Mercedes-Benz C-Class debuted with more tech in February. It measures 4.69 metres long, which is slightly shorter than the BMW. Both models offer standard rear-wheel drive and available all-wheel drive. Buyers can choose between four, six, and eight-cylinder powerplants. The range-topping Mercedes-AMG C63 has 503 bhp, and there's still a long time until a new M3 competes against it.