Venting the low-temperature cooling system
NOTE:
DANGER
High-voltage system.
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!
High-voltage system.
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!
- All work on the high-voltage system may only be carried out by specially trained and technically experienced personnel.
- For additional information see:
- For additional information see:
WARNING:
Hot surfaces.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
Preliminary work
NOTE:
TECHNICAL INFORMATION
Immobilization period-long fill of coolant!
Do not reuse used coolant.
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be emptied and refilled.
In the case of other removal work involving the draining of part quantities of coolant, the coolant level must be topped up with new coolant.
Immobilization period-long fill of coolant!
Do not reuse used coolant.
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be emptied and refilled.
In the case of other removal work involving the draining of part quantities of coolant, the coolant level must be topped up with new coolant.
NOTE:
TECHNICAL INFORMATION
Before starting the automatic cooling system bleeding procedure, make sure that both coolant circuits are filled. The cooling system bleeding procedure is automatically started simultaneously for both coolant circuits. If the cooling system bleeding procedure is started while one of the coolant circuits is empty, there is a risk of damage to the electric coolant pump when running it dry.
Make sure that terminal 15 is not disconnected for the bleeding procedure. Switch on low-beam headlights and hazard warning lights. If the low-beam headlights and hazard warning lights are not switched on, the ignition (terminal 15) will switch off automatically after a certain period of time and interrupt the bleeding procedure.
Before starting the automatic cooling system bleeding procedure, make sure that both coolant circuits are filled. The cooling system bleeding procedure is automatically started simultaneously for both coolant circuits. If the cooling system bleeding procedure is started while one of the coolant circuits is empty, there is a risk of damage to the electric coolant pump when running it dry.
Make sure that terminal 15 is not disconnected for the bleeding procedure. Switch on low-beam headlights and hazard warning lights. If the low-beam headlights and hazard warning lights are not switched on, the ignition (terminal 15) will switch off automatically after a certain period of time and interrupt the bleeding procedure.
NOTE:
TECHNICAL INFORMATION
Filling without the vacuum filling equipment (watering can filling) is not permitted.
Failure to observe this rule runs the risk of component damage/engine damage.
Filling specification absolutely must be adhered to.
It is not permissible to operate the vehicle if the filling procedure has not been fully completed. Otherwise functional limitations (degradation) and/or overheating may result.
A bleeding procedure is required after a part has been exchanged in the cooling system and/or after refilling the cooling system.
Filling without the vacuum filling equipment (watering can filling) is not permitted.
Failure to observe this rule runs the risk of component damage/engine damage.
Filling specification absolutely must be adhered to.
It is not permissible to operate the vehicle if the filling procedure has not been fully completed. Otherwise functional limitations (degradation) and/or overheating may result.
A bleeding procedure is required after a part has been exchanged in the cooling system and/or after refilling the cooling system.
- Remove the vacuum filling equipment from the coolant expansion tank of the low-temperature coolant circuit.
- Fill the coolant expansion tank of the low-temperature coolant circuit to the upper edge.
- The sealing cap (1) on the coolant expansion tank of the low-temperature coolant circuit must not
be closed.NOTE: TECHNICAL INFORMATION
Do not use a high-voltage charger. - Connect battery charger.
- Activate testing-analysis-diagnosis (PAD) by quickly pressing the START-STOP button three times.
- Activate the low beams and the hazard-warning lights at the same time.
If the low beams and the hazard-warning lights are not turned on, the ignition (terminal 15) turns off automatically after a while and interrupts the bleeding procedure.
- Set the heating to the maximum and the blower to the lowest setting.
- Depress the accelerator pedal and hold for 15 s.
The automatic cooling system bleeding procedure is initiated.
- Continue to fill the coolant level in the coolant expansion tank to the maximum mark during the cooling system bleeding procedure.
The cooling system bleeding procedure takes 11 minutes and ends automatically after this time.
- Adjust the fill level in the coolant expansion tank of the low-temperature coolant circuit to the maximum mark.
- Close sealing cap (1).
Follow-up work