Brake Fluid - Volkswagen Jetta VS5 2023 Owner's Manual

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● Add coolant shall not exceed the upper limit of
the marked area. Otherwise, when the engine
reaches the hot state, the excess coolant may
overflow under the pressure of the system and
damage the components in the engine com-
partment.
● If the coolant loss is large, the engine is
notcooling completely, do not add coolant! In
this case, it indicates that there is leakage fault
in the cooling system. Please contact the
qualified workshop to check the system as
soon as possible, otherwise, the engine will be
damaged.
● Do not add coolant when the coolant in the
expansion tank is completely exhausted! Oth-
erwise air may enter the cooling system. Do
not drive on. Seek expert assistance! Other-
wise it may cause engine damage!
● Must fill the vehicle oil according to the sys-
tem function, do not add the wrong oil! Other-
wise, this can cause serious malfunctions and
damage the engine.
Troubleshooting
Please refer to
and
at the start of the chapter on page 173.
Engine coolant
The warning lamp flashes red.
The engine coolant temperature is too high or
the coolant level is too low.
Do not drive on!
Stop as soon as practicable and safe to do so.
– Switch off the engine.
– Allow the engine to cool down.
Engine cooling system:
– Check the coolant level
Do not drive on or leave the engine running if the
warning lamp does not go out even though the
coolant level is correct.
– Seek expert assistance.
176
Owner's manual

Brake fluid

Fig. 140 In the engine compartment: cap of the
brake fluid reservoir
Brake fluid will gradually absorb water from the
surrounding air over the course of time. The
brake system will be damaged if there is too
much water in the brake fluid. The boiling point
of the brake fluid is also considerably reduced by
the water content. Heavy use of the brakes may
cause a vapour lock in the brake system if the
water content is too high. Vapour locks reduce
the braking efficiency, considerably increase
on page 164 and
braking distance and can even cause the brake
system to fail completely. Your own safety and
that of other road users depends on having a
brake system that functions properly at all
times
Brake fluid specification
Volkswagen has developed a brake fluid that has
been optimised for the brake system in the vehi-
cle. To ensure the best possible operation of the
brake system, only the brake fluid recommended
by the original manufacturer is allowed to be
used.
Brake fluid level
page 173.
The brake fluid level must always be between the
MIN (minimum) and MAX (maximum) markings
on the brake fluid reservoir
The brake fluid level cannot be checked accurate-
ly in all models as a flap or engine components
may partially conceal the brake fluid container. If
the brake fluid level cannot be read exactly,
please seek assistance from a suitably qualified
workshop. Volkswagen recommends using a
Volkswagen dealership.
.
.

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