Auto high-beam system can automatically turn on the high beams when its windshield-mounted sensors detect no vehicles ahead. The auto high-beam system switches to the low beams when vehicles ahead are detected.
To turn on the auto high beam feature on a Mercedes-Benz, follow these steps:
- Set the headlight switch to AUTO.
- Push the turn signal switch forward.
- Ensure the AUTO or high beam with the A symbol stays on.
Auto headlight feature is most helpful when driving on secondary or country road and there are no other cars on the road. They can also be used on the highway as long as there is insignificant traffic.
The high beams may stay off if the highway has street lights. This does not mean that your Mercedes-Benz auto high beam system is not working.
You can use this function to set the headlamps to change between low beam and high beam automatically. The system recognizes vehicles with their lights on, either approaching from the opposite direction or traveling in front of your vehicle, and consequently switches the headlamps from high beam to low beam.
The system automatically adapts the low-beam headlamp range depending on the distance to the other vehicle. Once the system no longer detects any other vehicles in front of you (moving in either direction), it reactivates the high-beam headlamps.
The system's optical sensor is located behind the windshield near the overhead control panel or at the top of the windshield.
Adaptive Highbeam Assist may fail to recognize other road users that have lights or may recognize them too late in sporadic cases. Turn off the auto headlight feature if the system malfunctions and keeps high beams on even if there are other vehicles in front of you.
Follow this guide, if your auto high beam feature does not work.