How to adjust the headlight height on A4L?
2 Answers
A4L headlights can be mechanically adjusted for height, which involves adjusting the proportion relative to the vehicle body level. Under stationary conditions, the headlights can be relatively adjusted using the small hexagonal wrench located on the left front fuse box. Afterward, the level sensor will reference this height value for further adjustments. The left headlight's cutoff line is set lower than the right headlight's for safety reasons. Generally, the factory settings are optimal, and manual adjustments should be avoided. More details are as follows: 1. Car headlights, also known as front headlights or LED daytime running lights, are not only crucial for a car owner's appearance but also essential for safe driving at night or in poor weather conditions. The use and maintenance of car lights should not be overlooked. 2. Only the 1.8T version of the Audi A4L comes with a headlight height adjustment knob. The 2.0T and higher configurations do not have this knob, as the headlights automatically scan and adjust their height when turned on. This is because the high-end xenon headlights feature a bi-xenon projector system that automatically adjusts the position of the internal shutter to control the light height, eliminating the need for manual adjustments. The lower-end models use separate halogen lights for high and low beams, allowing for manual height adjustments.
I remember on the day I picked up the car, the salesperson specifically taught me how to adjust the headlight height. The A4L's adjustment button is located in the lighting control area on the left side of the steering wheel, featuring a wheel with up and down arrows marked with numbers from 0 to 3. Setting 0 is the highest position, while 3 is the lowest. Before adjusting, it's best to find a flat wall, stand about 5 meters away, turn on the low beams, and observe the changes in the light cutoff line as you rotate the wheel. Older models might require manually adjusting under the hood; there are two white plastic screws at the back of the headlights—using a Phillips screwdriver to turn them can adjust the height and left-right alignment. After adjustment, remember to test the effect under different road conditions to avoid dazzling oncoming drivers, especially on downhill sections where this mistake is most common.
