Enhance your driving experience with the 2015 BMW 4 Series. The 4 Series provides a unique driving experience thanks to the low center of gravity and an efficient engine with TwinPower Turbo technology. The BMW 4 Series is available in two different trims and three different styles: 428i or 435i; Coupe, Gran Coupe, or Convertible. An iDrive 4.2 navigation system optimizes the driving experience further with state-of-the-art technologies, like advanced real-time traffic, social media applications, and SiriusXM™ radio. The 2015 BMW 4 Series is available in two trim levels: 428i and 435i. Both trims are available in three different styles: Coupe, Gran Coupe, and Convertible.