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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    Preparation
    1. Check whether the battery of the other vehicle has a voltage of 12 volts. This information can be found on the battery. 2. Switch off the engine of the assisting vehicle. 3. Switch off any el ...

    Welcome lamps
    When parking the vehicle, leave the switch in position or : the parking and interior lamps light up briefly when the vehicle is unlocked. Activating/deactivating 1. "Settings" 2. &q ...

    Changing, maintaining, and storing the speed
    The rocker switch can be pressed while the system is interrupted to maintain and store the current speed. DSC Dynamic Stability Control is switched on, if necessary. Adapting the desired s ...