Leather Power Seats, Power Sunroof, CD Radio, Keyless Entry! A 193-horsepower 2.8-liter inline six-cylinder powers the 528i. All models come with front bucket seats with 10-way power adjustments, automatic climate control and a power tilt/telescopic steering column. All models have two-stage front airbags whose deployment force depends on crash severity and whether the occupants are buckled, side-impact airbags for the front seats, and the Head Protection system — a tubular side airbag that deploys from the roof liner to protect front-seat occupants.