Windshield Washer Fluid, Checking Freeze Protection And Filling
Special Tools And Workshop Equipment Required
Read the cut-off line to obtain an accurate value for the following tests. Place a drop of water on the glass using a pipette to improve the readability of the cut-off line. The cut-off line can be clearly recognized on the "WATERLINE".
-- Check the concentration of the anti-freeze additive using :T10007A (operating instructions).
The refractometer scale -4- applies to the freeze protection for the windshield wiper/washer system.
Mixture Ratio:
| Freeze Protection To | Original Washer Fluid. | Water |
|---|---|---|
| -17/-18 °C (1.4/-0.4 F) | 1 part | 3 part |
| -22/-23 °C (-7.6/-9.4 °F) | 1 part | 2 part |
| -37/-38 °C (-34.6/-36.4 °F) | 1 part | 1 part |
-- Fill the windshield wiper/washer system fluids (only at customer request).
Only use original washer fluid year-round to fill the windshield wiper/washer system.
Depending on the time of year a winter product or summer product with higher cleaning function should be used.
Ready to use windshield washer fluid (Ready Mix) does not need to be thinned with water.
Original washer fluid prevents the spray nozzles, receiver/dryer, and connecting hoses from freezing.
Vehicles with spray nozzles must be filled with original washer fluid as this fluid has a low viscosity at negative temperatures. The complicated spray jet system could otherwise become blocked due to crystallized washer fluid that can affect the fan pattern of the spray. Original washer fluid assures that the spray nozzles remain functional even at low temperatures.
Use original washer fluid also in warm periods of the year. The powerful cleanser removes wax and oil from the window glass without a problem.
Freeze protection in the windshield wiper/washer system must be guaranteed to approximately -25 °C (-13 °F) (approximately -35 °C (-31 °F) in countries with an arctic climate).