On most BMWs, the headlights are turned on at the same time as the engine. This is done with an additional relay which is activated by a signal from one of the various switches in the car. And since your headlight switch isn’t actually turning anything on or off, it’s important that this circuit not be working when you’re trying to avoid draining the battery.

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The relay is usually located in the engine compartment, near the fuse box. There should be a diagram near it that will tell you which fuse powers the headlights. Simply remove that fuse, and your headlights will stay off when the car is turned off. Just make sure to replace the fuse when you’re done so you don’t get stranded in the dark.
If you can’t find the relay, or if it’s not in the engine compartment, there should be a headlight switch somewhere near the driver’s seat. Push it in and hold it for a few seconds. The headlights should turn off. To turn them back on, just push the switch again.

What can make the headlights not to turn off?

One possibility is that the switch is bad. If you can’t turn the headlights off with either of the methods described above, then it’s probably time to replace the switch.

Another possibility is that there’s a problem with the relay.

Or, finally, there could be a problem with the wiring leading to the switch or the relay. In this case, it would probably be a good idea to have a professional mechanic diagnose your problem further.

Can you turn off your bmw 328i headlights while driving?

No, you cannot turn off your BMW 328i headlights while driving. The headlights can only be turned off when the car is turned off. If you need to turn the headlights off while driving, you will need to find a way to stop the car and turn it off.