See also:

Exterior
With standard visual cues that come only with the 128i's optional M Sport Package, the 135i has an aggressive front bumper with three large air inlets. Xenon headlights are standard, and they carr ...

Around the steering wheel: controls and displays
1. Convertible: opening and closing windows jointly 2. Convertible: opening and closing rear windows 3.Opening and closing front windows 4.Folding exterior mirrors in and out 5.Adjusting exter ...

Twin-scroll turbocharging
The new four-cylinder engines also feature twin-scroll turbocharging. This means that the exhaust stream from cylinders 1 and 4, and the exhaust stream from cylinders 2 and 3, follow separate spir ...