The coolant consists of water with a concentration of coolant additive. This mixture guarantees antifreeze protection, protects the cooling/heater system against corrosion and prevents the formation of scale.
Vehicles exported to countries with a mild climate are already factory-filled with a coolant which offers antifreeze protection down to about -25 °C. In these countries the concentration of coolant additive should be at least 40 %.
Vehicles exported to countries with a cold climate are already factory-filled with a coolant which offers antifreeze protection down to about -35 °C. In these countries the concentration of coolant additive should be at least 50 %.
If a higher concentration of antifreeze is required for climatic reasons, the amount of coolant additive can only be increased up to a maximum of 60 % (antifreeze protection down to approx. -40 °C).
When refilling, only use the same antifreeze identified on the coolant expansion vessel » Fig. 129 on page 145.
WARNING
CAUTION
Capacity
Checking the coolant level
Fig. 129 Engine compartment: Coolant expansion reservoir
The coolant expansion bottle is located in the engine compartment » Fig. 129.
Explanation of graphic » Fig. 129
The coolant level should be kept between the marks A and B.
If the coolant level is above the mark A, no coolant may be topped up.
If the coolant level is below the mark B, the coolant must be topped up.
Check the status
Check the coolant level only when the engine is cold.
If the engine is warm, the test result may be inaccurate. The stand can also be above the mark A » Fig. 129 .
If the coolant level in the coolant expansion tank is too low, this is indicated
by
the warning light lighting up
in the instrument cluster » page 37,
Coolant.
We still recommend inspecting the coolant level directly at the reservoir from time to time.
Loss of coolant
A loss of coolant is first and foremost an indication of a leak in the system. Do not merely top up the coolant. Have the cooling system checked by a specialist garage.
Replenishing
Only top up with new coolant.
Do not use an alternative additive if the specified coolant is not available in an emergency. In this case, use just water and have the correct mixing ratio of water and coolant additive restored by a specialist garage as soon as possible.
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