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Coolant
Coolant specifications
Coolant is a mixture of water and at least 40% coolant addi-
tive.
The cooling system must be filled with a mixture of water and at least 40 % of
our coolant additive G 12+ or an additive with the specification TT-VW 774 F
(it is dyed purple). This mixture gives the necessary frost protection down to
-25°C and protects the alloy parts of the cooling system against corrosion. It
also prevents scaling and raises the boiling point of the coolant.
The concentration of coolant must always be at least 40% - even if frost
protection is not required.
If greater frost protection is required in very cold climates, the proportion of
the antifreeze additive G 12+ can be increased. However, the percentage of
coolant additives should not exceed 60%, as this would reduce the frost
protection. It would also reduce the cooling effect. A mixture with 60%
coolant additive will give frost protection to approx. -40°C.
WARNING
•
The coolant additive is toxic. This represents a toxic danger. Always
keep the coolant additive in the original container which should be stored
out of the reach of children. The same applies to coolant which you have
drained off.
•
The coolant additive G 12+ must be added in sufficient quantities to
provide anti-freeze protection at the coldest ambient temperatures that
can be expected. At extremely cold ambient temperatures, the coolant
could freeze, causing the vehicle to breakdown. As the heater would also
not work in this situation, there is a risk of suffering exposure!
Safety First
Handling instructions
Caution
•
Other additives may give considerably inferior corrosion protection. The
resulting corrosion in the cooling system can lead to a loss of coolant,
causing serious damage to the engine.
•
The coolant additive G 12+ (purple) can be mixed with the additive G 12
(red) or G 11. Never mix G12 (red colour) with G 11.
Checking the coolant level and topping up
The correct coolant level is important for fault-free func-
tioning of the engine cooling system.
Before opening the bonnet, read and observe the warnings ⇒
"Safety instructions on working in the engine compartment" on
page 193.
Tips and Maintenance
Checking and refilling levels
Fig. 139 In the engine
compartment: Coolant
expansion tank cap
in
Technical Data
201
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