There is a set of light combination switches on the left side of the steering wheel. At night, when the combination switch rotates forward, it opens the dashboard. When the lamp rotates, it turns on the low beam. (The combination switches of each brand are different, but they are basically the same. ) The low beam switch of BMW 320 is on the gear handle on the left side of the steering wheel.

When to turn on the low beam, turn on the low beam when there are street lamps on the road at night, turn on the low beam when there are pedestrians on the roadside at night, and turn on the low beam when there are narrow roads and narrow bridges.

Regarding the low beam lamp, the low beam lamp is used for close-range lighting. The design requirements are large irradiation range (160), short irradiation distance and non-adjustable concentration.