Vince Gardner, an outside consultant, designed the fiberglass-bodied AMX II, a less radical two-door for the "Project IV" exhibit.[102] This four-passenger hardtop (no B-pillar) notchback coupe had little in common with the AMX I.[2] This car featured a longer wheelbase and an overall length of 187 in (4,750 mm). The windshield wiper blades were concealed by a panel which raises when wipers are activated and the grille that was surrounded by a massive bumper had horizontal multi-bars with hidden headlamps.[3] Safety innovations included doors that locked automatically when the engine is started, reflectors on the sides of the rear fenders, rear tail lamps that signaled the driver's intentions: green when the car is in motion, amber when the driver removes foot from the accelerator, and red when braking.[101]