Cooling System, Draining And Filling: Filling: Notes

Engines: AEG, AVH, AZG, BEJ and BER

NOTE:

Only use coolant additive G12 in accordance with TL VW 774 D.
Distinguishing color: red
Do not mix G12 with other coolant additives!
If the fluid in the expansion tank is brown, G12 has been mixed with another coolant additive. In this case the coolant must be changed.
G12 and coolant additives marked "In accordance with TL VW 774 F" prevent frost and corrosion damage, scaling and also raise boiling point of coolant. For this reason the system must be filled the entire year with frost and corrosion protection additives.

Engines: APK, AQY, BBW, BEV and BHP

NOTE:

Only use coolant additive G12 in accordance with TL VW 774 F.
Distinguishing color: violet
G12 and coolant additives marked "In accordance with TL VW 774 F" prevent frost and corrosion damage, scaling and also raise boiling point of coolant. For this reason the system must be filled the entire year with frost and corrosion protection additives.
G12 violet (according to TL VW 774 F) can be mixed with coolant additive G12 red.

Continue for all engines

Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.
Protection against frost must be assured to about -25° C (in arctic climatic countries to about -35° C).
The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The anti-freeze ratio must be at least 40%.
If for climatic reasons a higher frost protection is required, the amount of G12 can be increased, but only up to 60% (frost protection to about -40° C), as otherwise frost protection is reduced again and cooling effectiveness is also reduced.
Refractometer T10007 is recommended to determine coolant freezing temperature.

Fig 1: Identifying Refractometer T10007
Courtesy of VOLKSWAGEN UNITED STATES, INC.
If the radiator, heat exchanger, cylinder head or cylinder head gasket is replaced, do not reuse old coolant.

Recommended Coolant Mixture Ratios

Anti-freeze to

Anti-freeze proportion

G 12 ⁽¹⁾

Water ⁽²⁾

-25° C

40%

2.0L

3.0L

-35° C

50%

2.5L

⁽¹⁾	The quantity of coolant can vary in dependence on the vehicle equipment.

⁽²⁾	Use only clean drinking water.