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234
Checking and refilling levels
The cooling system is filled at the factory with the correct amount of anti-
freeze for the country concerned.
In most cases, the mixture consists of 60% water and 40% antifreeze. This
mixture gives the required antifreeze protection at temperatures down to
-25 °C and particularly protects the metal parts of the cooling system against
corrosion. It also prevents scaling and significantly raises the boiling point of
the coolant fluid.
Countries with warm climate
The coolant fluid concentration must not be reduced by adding plain water,
even in the summer or in warm climates. The concentration of the antifreeze
must always be at least 40%.
Countries with cold climate
If greater freeze protection is required in very cold climates, the proportion of
G12++ antifreeze can be increased. A concentration of 60% offers antifreeze
protection of temperatures down to approx. -40 °C. However, the concentra-
tion of antifreeze must not exceed 60%, as the antifreeze protection would
then drop and the performance of the coolant system would suffer.
Vehicles for countries with cold climates (e.g. Sweden, Norway and Finland)
have factory-filled antifreeze protection for temperatures down to -35 °C. In
these countries, the concentration of antifreeze should always be at least
50%.
Caution
•
It is advisable to have the cooling system checked before the winter
season to make sure that the antifreeze concentration is adequate for the
conditions to be expected. This applies particularly if you intend to take the
vehicle into a colder climate zone. If necessary, have the antifreeze concen-
tration increased to 50 - 60% as required.
•
Use only G12++ antifreeze, an additive meeting the "TL-VW 774G" spec-
ification. Other antifreezes may give considerably inferior corrosion protec-
tion. The damage caused by the use of these antifreezes may lead to a loss of
coolant fluid, causing serious damage to the engine.
•
G12++ antifreeze can be mixed only with antifreeze additives G11, G12
and G12+.
Checking the coolant level
The coolant level can be checked visually.
– Switch the ignition off.
– Check the coolant level on coolant fluid expansion tank
⇒ fig.
179. When the engine is cold, it should be between the
"min" and "max" marks. When the engine is hot, it may be
slightly above the "max" mark.
Its location is shown in the corresponding general overview of the engine
compartment.
Fig. 179 Engine compart-
ment: Coolant fluid
deposit
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