The fluid level in the servo control reservoir (2) must be measured with the engine running. To do this, unscrew the reservoir cap (1) and look at the dipstick. The arrows indicate the marks.
Constant control
1. To check the fluid level, start the engine at idle speed.
2. Place the steering wheel straight.
3. Unscrew the lid (be careful, spring), wipe the dipstick with a clean cloth, do not screw it, put the cap on the filler hole. Remove the cap again and look at the dipstick to see what the fluid level is. It should be between the marks.
4. When topping up, the level should reach the "MAX" mark.
5. In principle, the loss of fluid indicates a leak in the hydraulic system. Therefore, in this case, do not just fill the hydraulic oil, but first find the leak!