Servicing windshield wipers and washer fluid nozzles (Audi Q7-4L-D)

1. Over time, road film accumulates on windshield wiper blades, reducing their effectiveness. Therefore, the blades should be regularly washed in a mild cleaning solution or replaced.

2. Windscreen wiper blade assemblies should be inspected regularly. If inspection reveals hardening or cracks in the rubber of the wiper blades, replace them. If nothing unusual is found during inspection, wet the glass and turn on the windshield wipers for a short time. Uneven wiper blade marks or streaks on clean glass indicate that the wiper blades need to be replaced.

3. If the wipers do not clean the glass well enough, this may be due to wax particles that got on the glass when the car passed through an automatic car wash. These particles can be removed by using a detergent with wax-dissolving properties as an additive to the washer fluid (see Specifications). To remove wax, you can also use glass cleaning cloths G052 522 A1 according to VW specification.

Checking and adjusting the washer fluid nozzles

Note: The headlight washer nozzles do not require adjustment.

4. The points where liquid hits the windshield and rear window for a moving vehicle are shown in Illustrations 7.4a-b.







To check, it is convenient to apply them with a water marker on the outside of the glass, and then transfer them to the inside of the glass.

Note: Windshield adjustment values are given for a moving vehicle; when the vehicle is stationary, the angle of the jets may differ slightly. When the rear window wiper is in the rest position, the outer jet should only lightly touch the glass.

5. If necessary, the injectors can be adjusted with a suitable needle or device T40187 (see illustration).



If you cannot adjust the injectors, remove them (see Chapter 11), rinse in the opposite direction and blow in the opposite direction. If the injector still cannot be adjusted, replace it. Do not use any objects to clean the injectors.

Checking and adjusting the parking position of the windshield wiper arms

6. After switching off, the windshield wiper arms should stop in the parking position. To extend the life of the windshield wipers, after every second time they are turned off, the levers are set to an alternative parking position (from the normal parking position, the levers move slightly upwards). Further checking applies to the normal parking position. You can verify this position by observing the brushes when the windshield wipers are turned off several times in a row.

7. The parking position of the windshield wipers is set correctly if the distances in it (a and b in illustration 7.7a) from the brush blades to the air intake chamber cover are 15 and 45 mm, respectively, with a tolerance of +5 mm.



The rear window wiper parking position is set correctly if the distance in it (and in illustration 7.7b) from the brush blade to the bottom edge of the glass is 19 mm with a tolerance of ±5 mm.





8. The parking position of the windshield wipers is adjusted by moving their levers with their mounting nuts loosened (see Chapter 11). After adjustment, tighten the nuts to the specified value Specifications by force.

Removal and installation windshield wipers

Note: Windshield wiper blades come in different lengths.

9. To move the wiper arms away from the windshield, they must first be set to the service position. To do this, go to the menu "Car＞Systeme＞Sheibenwischer＞Servicestellung" select "ein" ("on") on the MMI display. To return the windshield wipers to their original position, select "aus" ("off") in the menu, or move the right steering column stalk to any position.

10. To remove the windshield wiper blade, lift the wiper arm from the glass, squeeze the latches (1 in illustration 7.10a) and move the brush in the direction of the arrow (2).



To install, push the brush all the way in (1 in illustration 7.10b) on the lever (2), inserting it into the protrusion until it locks.





Lower the lever onto the glass.

11. To remove the rear window wiper blade, lift the wiper arm from the glass and press the clips with a screwdriver (arrows in the illustration) and pull the brush (2) out of the lever (1).



The brush can only be installed in one position. When installed, the brush is fixed with a click.

[This publication is borrowed from the resource: AudiManual.ru]