The 2012 BMW 3 Series is available in sedan, coupe, hardtop convertible and wagon body styles. The coupe, convertible and wagon belong to the previous-generation body style, whereas the sedan is an all-new model. Every body style starts off in 328i guise. The sedan comes standard with 17-inch alloy wheels, adjustable drive settings, automatic headlights, foglights, automatic wipers, cruise control, automatic dual-zone climate control, a tilt-and-telescoping steering wheel, eight-way manual front seats, leatherette premium vinyl upholstery, a leather-wrapped steering wheel, Bluetooth phone connectivity, the iDrive electronics interface and a premium sound system with a CD player, HD radio, an auxiliary audio jack and an iPod/USB audio interface. The 328i sedan is powered by a 2.0-liter turbocharged four-cylinder that produces 240 horsepower and 255 pound-feet of torque. Rear-wheel drive and a six-speed manual transmission are standard; an eight-speed automatic is optional. Both come with an auto start/stop function that turns off the engine when the car stops in order to save fuel. Every 2012 BMW 3 Series comes standard with antilock brakes, traction and stability control, front side airbags and side curtain airbags. The sedan gets front knee airbags. The convertible lacks the side curtains, but the regular front side airbags extend up to head level and there are also pop-up rollover hoops. The stability control system integrates several features designed to improve braking performance, such as periodically wiping the brake rotors dry when the windshield wipers are in use and automatically snugging the pads to the rotors when the driver abruptly lifts off the throttle. BMW Assist emergency communications is optional. The redesigned 3 Series sedan cabin gets a more contemporary update compared to the other body styles, especially around the dash, doors and center console. Sharper angles and bisecting trim pieces replace the former generation's more austere lines and bulges, while trim finishes range from cool aluminum to textured faux-wood. .