Reservoir
The fluid reservoir is in the dash under the dash cover panel. The panel can be lifted to fill the reservoir. To do this, grip in the recess at the back of the cover. When installing, insert the lower front edge first.
Checking fluid level
The correct fluid level is essential to the satisfactory operation of the brake system. The fluid level must always be between the "max" and "min" marks.
The level of fluid tends to sink slightly when the vehicle is used due to the automatic adjustment of brake lining wear. This is quite normal.
However, if the level sinks noticeably in a short time or drops below the "min" mark, the system may be leaking. The failure of a brake circuit is shown by lighting up of the brake warning lamp. In both occasions you should visit a workshop to check your brake system.
Brake fluid
Brake fluid absorbs moisture. As too high a water content becomes detrimental to the entire system after a period of time, the brake fluid must be renewed every two years. The brake system must be bled afterwards.
VW switched from DOT 3 specifications to DOT 4 in 1984. The two are
compatible and may be mixed, but use only DOT 4 for all changes and
fill-ups. DO NOT MIX DOT 4 AND DOT 5 !!! DOT 5 is a silicone based fluid
and has several very different characteristics beyond the scope of this
Tip that make it unwise to mix the two.
Brake servo
The servo is operated by vacuum which is only available when engine is running. For this reason the vehicle should not be allowed to roll with engine not running. When the brake servo is not working, the pedal must be pressed harder.
