Windshield and headlight washers (Opel Astra G)

The windshield and headlight washer reservoir is located at the front of the engine compartment behind the battery.

Fill the tank with clean water; the use of frost-resistant and cleaning additives is permitted.

When adding Opel Cleaning Solvent additives to water, observe the following additive/water ratios that ensure the required freezing point.

-5°C	1:3
-10°C	1:2
-20°C	1:1
-30°C	2:1

(Article posted on an online resource OPELBOOK.ru)