Spive
CAUTION: Opening the expansion tank may cause hot steam to escape.
Open the coolant expansion tank cap. Depending on the vehicle's equipment, remove the noise insulation or the underride guard. Release spring clip and remove coolant hose -2-. Position -1- is ignored.
Refueling
Caution: Only tap water may be used to obtain coolant. Water from artesian wells and wells does not have the qualities necessary to create a good coolant.
Note: On vehicles from model year 2008, only G 12 plus-plus, which complies with TL VW774G, may be used as a concentrate. G 12 plus-plus can be mixed with the old G 12 plus concentrate! Both concentrates have a distinctive feature: lilac color. Additives marked "according to TL VW 774 G" and/or "according to TLVW 774 F" prevent freezing of the coolant and the formation of corrosion and scale. In addition, they increase the boiling point of the coolant. For this reason, the cooling system, regardless of the season, must be filled with a coolant based on a concentrate with anti-corrosion additives. In countries with tropical climates and high engine loads, high boiling point coolant plays a significant role in ensuring reliable engine operation. The freezing point of the coolant must not exceed -25°C (in countries with an arctic climate - no higher than -35°С) Do not add water to the coolant (reducing in it, thus, the proportion of concentrate) even in the warm season or in countries with a warm climate. The proportion of concentrate in the coolant must be at least 40%. If, due to climatic conditions, the freezing point of the coolant must be lowered, you can increase the proportion of concentrate, but not whiter than 60% (freezing temperature in this case will be about -40°C). If this limit is exceeded, the freezing point will rise again and, in addition, the heat capacity of the coolant will decrease. When replacing a radiator, heater heat exchanger, MCC or MCC gasket, the drained coolant must not be reused.
The capacity of the cooling system may differ depending on the vehicle equipment. Push coolant hose -2- with spring clip onto connector. Position -1- is ignored. Depending on the vehicle equipment, install noise insulation or underrun protection.
With coolant filling tool -VAS 6096-
Top up coolant using cooling system filling tool -VAS 6096-.
Without coolant filling tool -VAS 6096-
Fill with coolant up to the max mark on the expansion tank.
With and without coolant filler -VAS 6096-
Close expansion tank. Switch off the heater.
Vehicles without auxiliary heater
Start the engine and let it run for about 3 minutes at about 2000 rpm. Leave the engine running until the radiator fan -V7- is switched on.
Vehicles with auxiliary heater
Caution: The auxiliary heater can only be switched on if the coolant circuit - as described below - is filled. Connect tester -VAS 5051B- as follows. Connect the diagnostic cable to the diagnostic socket in the footwell on the driver's side. Start the engine and let it run for about 3 minutes at about 2000 rpm. Sequentially press the buttons on the display "Vehicle self-diagnosis", "18 - Additional / auxiliary heater" And "03 - Final control diagnostics". Press the right arrow key on the display until the menu item Diagnosis of actuators for heater coolant shut-off valve -N27S-. Now start final control diagnosis for heater coolant shut-off valve -N279-. Continue to hold the speed at 2000 rpm for about 1 minute. Leave the engine running until the radiator fan -V7- is switched on.
Continuation for all cars
Check coolant level and top up if necessary. When the engine is warmed up to operating temperature, the coolant level should be at the max mark, with a cold engine - between the max and min marks.
Recommended mixing ratios: (use only tap water).
| Frost protection up to | Frost protection, share | Concentrate | tap water |
| -25°C | 40% | 2.25 l | 3.35 l |
| -35°C | 50% | 2.8 l | 2.8 l |
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