How to Use the Mercedes-Benz Headlight Cleaning Function?
3 Answers
To use the headlight cleaning function in a Mercedes-Benz vehicle: With the headlights turned on, press the windshield cleaning button five times consecutively. Here is an introduction to the headlight cleaning device: 1. The headlight cleaning device refers to a water outlet located below the headlights, which can clean dust and dirt from the headlights at any time. This feature is generally available in more high-end models. 2. During nighttime or low-light driving, rain and dust can reduce the illumination of the headlights by up to 90%, severely affecting the driver's visibility. This poses a significant safety hazard. Ensuring sufficient headlight illumination and providing the driver with clear visibility becomes a critical issue that needs to be addressed in such situations. 3. The headlight cleaning device offers a simple and effective solution to this problem. Many countries now have laws requiring vehicles to be equipped with a headlight cleaning system. Headlight cleaning devices typically use high-pressure spray washing, and the cleaning effectiveness mainly depends on the distance between the nozzle and the lens, the size of the water droplets, the contact angle, the spray speed, and the amount of water sprayed.
When driving a Mercedes-Benz, the headlight cleaning function is super practical, and I often use it to maintain clear visibility during night driving. The operation is quite intuitive: first, turn on the headlights, whether manually switched to ON or in AUTO mode, then start the vehicle. Next, pull the windshield washer lever—just a gentle tug all the way down. Yes, that’s the water-spraying lever, don’t just touch it slightly; you need to pull it fully. At this point, the small nozzles below the headlights will suddenly spray cleaning fluid, washing away dirt on the lens. Interestingly, Mercedes-Benz has designed an intelligent control system—only after using the windshield washer a few times will the headlight cleaning automatically activate once, avoiding wastage of cleaning fluid. Remember to keep the washer fluid reservoir topped up, as the system may not work if the fluid level is too low. This design enhances safety, and I recommend cleaning the headlight lenses more often in rainy, foggy, or dusty conditions to keep the lights unobstructed. In short, just try it—it’s very simple.
As an experienced Mercedes-Benz owner, let me explain how to use the headlight cleaning system. First, ensure the headlights are on - either manually activated or in AUTO mode. Once the vehicle is in motion, locate the wash lever on the right side of the steering wheel. Don't rush - pull it firmly all the way down, similar to operating the windshield washer, but Mercedes will simultaneously activate the headlight nozzles. The nozzles are typically positioned near the headlight assembly and will briefly spray fluid once per activation. Note this feature doesn't activate with every wash cycle - Mercedes has implemented an anti-waste mechanism that triggers headlight cleaning approximately every 5-10 windshield washes. Always check your washer fluid reservoir level before use; an empty tank will render the system ineffective. If unresponsive, possible causes include clogged nozzles or fuse issues requiring professional inspection. Keeping lens covers clean extends bulb life and reduces nighttime accident risks - a feature I particularly value during long-distance driving.
