Washer Fluid: Service and Repair

Windshield Washer Fluid, Checking Freeze Protection and Filling

Special tools, testers and auxiliary items required

• Refractometer (T10007 A)






Read the bright/ark boundary to obtain an accurate reading for the following tests. Place a drop of water on the glass to improve the readability of the bright/dark boundary. The bright/dark boundary can be clearly recognized on the "WATERLINE".

- Check concentration of anti-freeze additive using refractometer (T10007 A).

Scale - 4 - of refractometer applies to windshield cleanser concentrate (G 052 164).






Mixture Ratio






Filling-up with fluid:

The windshield washer system fluid reservoir must be filled.

Use only windshield washer fluid concentrate (G 052 164) all-year-round.

• Windshield washer fluid concentrate (G 052 164) protects the spray nozzles, the reservoir and the hoses from freezing.

• All vehicles with fan type spray jets must be filled with windshield washer fluid concentrate (G 052 164) as this fluid has a low viscosity at minus temperatures. The complicated spray jet system could otherwise become blocked due to crystallized washer fluid that can affect the fan pattern of the spray jet. Windshield washer fluid concentrate (G 052 164) assures that the fan type spray nozzles remain functional even at low temperatures.

• Use windshield washer fluid concentrate (G 052 164) in the warm season as well. The powerful cleanser removes wax and oil deposits from the windows.

• Freeze protection (anti-freeze) must be guaranteed to approximately -25 C (approximately -35 C in countries with an arctic climate) in the washer system.