Under the Hood

The 135i's turbocharged inline-six makes 300 horsepower and 300 pounds-feet of torque. It works through a six-speed manual or BMW's seven-speed dual-clutch automatic. Either car hits 60 mph in about 5 seconds, BMW says. The M Sport Package adds a sport-tuned suspension with high-performance, six-piston front and two-piston rear brakes.

If that seems like too much, consider stepping down to the 230-hp, normally aspirated 128i, which is covered separately in the Cars.com Research section.

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    Initializing after a power failure
    After a power failure during the opening or closing process, the roof can only be operated to a limited extent. Initializing the system The system can be initialized when the vehicle is statio ...

    General information
    Refuel promptly Refuel below a range of 30 miles/50 km; otherwise, engine functions are not ensured and damage may occur. ...

    Automatic headlamp control
    Switch position : the low beams are switched on and off automatically, e.g., in tunnels, in twilight or if there is precipitation. The indicator lamp in the instrument cluster lights up. A blu ...