What is the reason for the missing calibration of the Mercedes wiper?
2 Answers
Mercedes wiper calibration is missing due to insufficient wiper pressure. Tension adjustment: The wiper mainly adjusts the tightness by adjusting the length of the tension spring or adding a pull ring at the hook. If the wiper pressure is too high, a pull ring should be added at the hook, which reduces the spring's extension and thus the pressure; if the wiper pressure is too low, the pull ring at the hook can be manually adjusted to a smaller size, typically ranging from a few millimeters to a few centimeters depending on the pressure requirements. Fault causes: The causes of abnormal noise, jumping, or incomplete wiping of the wiper may not only be due to the wiper arm being tilted. It could also be due to aging wiper blades, accumulated grease on the glass, or the application of other protective products.
The other day I was driving my Mercedes to the suburbs when the dashboard suddenly displayed a warning about missing wiper calibration. This issue is most likely caused by a dirty or obstructed multifunction camera at the top of the windshield, as this pre-collision system relies on it to identify road markings. During the rainy season, it's common for tree sap or insect residue to obscure the lens—simply cleaning it with a soft cloth dipped in windshield washer fluid usually solves the problem. If the error persists after cleaning, check whether the windshield has been replaced. Even a 0.5mm curvature deviation in aftermarket glass can throw off the calibration data, requiring recalibration with an OEM part. During calibration at the dealership, specialized tools must be clamped onto the wiper pivot, and the wiping angle is fine-tuned using diagnostic software—something you can't do yourself.
