You're all WRONG!!! Here's what a proper smart needs:
(1) Sealed body, we all need to go boating sometimes.
(2) NASA air balloons; drive off a cliff and bounce your Earth Rover to safety.
(3) Platinum and Gold body panels and Tridion Cell; who cares that your car is so heavy that it drags the ground without hydraulics, your car is safer than anything else in the world! And it costs more than anything you'll ever own!
(4) Bomb shelter conversion; Hello? Ever heard of NukleoN fallout? At least you'd have the only car after they drop da bomb!
(5) smart RV; Come on people, what's better than camping in a two seater with little room in the back?
(6) smart V10; Dodge and Ford did it to their trucks, why not a 1,800 lb city car?
(7) smagatti; We all need a top speed of 253mph
(8) Razor blades; That'll teach those juvenile delinquents for trying to deface your car.
(9) Defense System; You'll know you're a true patriot when you car uses it's own mini gun, RPG, and flamethrower to take out those smart tippers!
(10) Restroom mode; we're getting old here...
(11) Battering Ram; Tired of traffic?