Where to Refill Windshield Washer Fluid in a Mercedes-Benz?
2 Answers
Mercedes-Benz windshield washer fluid is refilled at the rear side of the engine hood pressure strut, with the filler cap marked by a washer symbol. Windshield washer fluid is a consumable item with no fixed replacement interval, depending on the frequency of use by the driver. Method for refilling windshield washer fluid: Turn on the wiper switch to spray out the old fluid first; when the wiper nozzles stop spraying, add a small amount of new fluid into the filler port. Then, turn on the wiper knob to clean out the remaining old fluid solution. When the nozzles stop spraying for the second time, add approximately 4L of windshield washer fluid, completing the refilling process. Functions of windshield washer fluid: Cleaning performance: Windshield cleaner is formulated with various surfactants and additives. Surfactants typically have wetting, penetrating, and solubilizing functions, thereby achieving cleaning and stain removal; Antifreeze performance: The presence of alcohol and ethylene glycol significantly lowers the freezing point of the liquid, providing antifreeze effects and quickly dissolving frost; Anti-fog performance: A single-molecule protective layer forms on the glass surface. This protective film prevents the formation of fog droplets, ensuring clear and transparent windshields with unobstructed visibility; Anti-static performance: After cleaning with windshield cleaner, substances adsorbed on the glass surface eliminate static charges on the glass; Lubrication performance: The ethylene glycol in the windshield cleaner has high viscosity, providing lubrication to reduce friction between the wipers and the glass, preventing scratches; Anti-corrosion performance: Windshield cleaner contains various corrosion inhibitors, posing no corrosive effects on any metals, and is absolutely safe for automotive paint and rubber.
As a seasoned Mercedes driver for many years, I remember that windshield washer fluid is added in the engine compartment. The exact location depends on the model, but it's usually towards the rear of the engine, with a blue cap on either the left or right side marked with a windshield wiper symbol. First, open the hood and look for the dedicated filler port near the engine. Be careful when pouring the fluid—don’t pour too quickly to avoid splashing, and never pour it into other openings like the coolant reservoir, as that could damage the car. I recommend using OEM windshield washer fluid or an antifreeze type in winter. In summer, plain water can work in a pinch, but try not to mix different types to prevent pipe corrosion. Regular checks are important—I usually top it up every two months to ensure smooth spraying and clear visibility, keeping driving safe on the road.
