2. Wipe the rubber bands of the wipers with a soft cloth soaked in glass cleaner.
3. Check the condition of the rubber bands. Make sure there are no hardenings, damages or cracks. Replace the bands if necessary.
If the brushes work with a "scraper" effect, adjust the position of the windshield wiper arms.
Windscreen washer - check
Materials required:
- glass cleaning concentrate.
4. Open cover 1 and check the level of washing fluid in the windshield washer reservoir (see illustration).

Article was borrowed from the website MercedesMAN
If necessary, fill the tank with a mixture of concentrate and drinking water.
Attention! For vehicles with heated jets, the concentration of the cleaning fluid is considered sufficient if it provides protection against freezing at -10°C.
5. Check the position of the windshield washer jets.
6. Turn on the ignition and turn on the windshield washer. If necessary, clean the nozzle holes with a needle.
7. Check the position of the jets. The jet of washing liquid should hit the designated places on the windshield (see illustration).

8. Adjust the position of the washer jets if necessary.
