The front bucket seats are very comfortable and supportive, with big side bolsters. The 135i steering wheel tilts and telescopes, helping drivers of different shapes and sizes to find the ideal driving position.

The iDrive system features a pop-up screen on the dashtop for managing the entertainment, optional navigation, vehicle, and telephone systems.

All 135i coupes come with a 60/40 split folding rear seat than can provide almost triple the trunk room of 13 cubic feet. A storage package for the trunk area includes some tie-downs and straps and a 12-volt power point for external accessories.

The convertibles feature a soft top that can be raised or lowered in 22 seconds, even while driving at speeds up to 25 mph so you don't need to worry whether that stoplight will be long enough to finish the roof operation. The soft top takes up less trunk space than a convertible hard top would, which is partly why the design uses a soft top. They are expected to be high-quality, three-layer insulated soft tops.