Permanent check
Although the indicator on the dashboard will warn you about a too low brake fluid level in the Audi-100, you still cannot refuse visual control:
Open the hood and, if necessary, clean the brake fluid reservoir with a cloth.
In the transparent reservoir, the brake fluid level must be between the marks «min» And «max». In this case everything is fine.
Fluid level too low?
If the disc brake pads are already slightly worn, the fluid level is most likely near the bottom mark; if they are new, then most likely it will be higher. This is perfectly normal, because disc brake pistons, which protrude a little further with worn linings, leave more volume in the caliper cylinders, which is filled with brake fluid.
The critical moment occurs if the level of brake fluid in the reservoir falls below the minimum mark. Since the brake fluid does not evaporate and is not consumed, this means that there is a leak somewhere in the system. Therefore, it is urgent to look for the cause and place of the leak, without waiting until the brake pedal goes into the void. Just adding liquid to the tank is self-deception!
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