The 2017 Smart Forfour Prime Premium a compact, city-oriented 5-door hatch with seating for four, short wheelbase and easy parking. Top-spec trim adds upgraded upholstery (leather/leatherette options), alloy wheels, chrome exterior accents, heated front seats and automatic climate control in many markets, plus upgraded infotainment (central display, Bluetooth, USB) and keyless entry/start where fitted. Powered by small, fuel-efficient petrol engines (often a turbo three-cylinder) with manual or automated gearbox; tuned for nimble, economical urban driving rather than high power. Safety includes multiple airbags, ABS and stability control, with parking sensors/camera optional. Overall: a refined, well-equipped compact city car.