To avoid deformation of the wiper blades, the wiper blades must be cleaned regularly with glass cleaner. If the brushes are heavily soiled, for example by insect residues, the brushes should be cleaned with a sponge or a clean cloth.
For safety reasons, wiper blades should be replaced once or twice a year.
In case of frost, before each first switching on of the windshield wipers during the trip, you should check whether the brushes have frozen to the glass!
If the brushes do not clean the windshield well enough, then the following reasons for this are possible.
Wax particles got on the windshield while the car was being washed. These particles can be removed by adding a glass cleaner, which has the property of dissolving wax, to the windshield washer fluid.
Filling the fluid reservoir with a glass cleaner with wax-dissolving properties can significantly improve the performance of the windshield wipers. Grease-dissolving cleaners cannot completely clean glass.
Damage to the brushes can also cause poor cleaning of the windows, the brushes should be replaced.
Work on checking and adjusting the installation angle of the wiper arms is carried out by Volkswagen service enterprises.
Withdrawal
Raise the wiper arm away from the windshield. Rotate the wiper blade 90°to the wiper arm.
Press the wiper blade latch (arrow A, fig. 1.50), then move the brush along the lever (arrow B) and, moving it in the opposite direction, remove it from the wiper arm.
On both sides, squeeze the steel reinforcements of the wiper rubber band and remove the wiper rubber band from the end of the wiper (see fig. 1.51).
Installation
Insert a new rubber band without steel reinforcements into the lower clips of the wiper blade.
Insert the steel reinforcements into the first groove of the rubber band.
Using pliers, squeeze the steel reinforcements together with the rubber band and insert them into the upper clip of the wiper blade. In this case, the antennae of the clamp must enter the latches on the rubber band (see fig. 1.52).
Establish brushes of a screen wiper on levers in sequence, return to removal. In this case, the latch should clearly fix the brush on the wiper arm.
Lower the wiper arm onto the windshield.
For safety reasons, change the brushes once or twice a year.
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