Bleed the high-temperature coolant system
WARNING:
Hot surfaces.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
Preliminary work
Bleeding the high-temperature coolant circuit
NOTE:
TECHNICAL INFORMATION
Filling without the vacuum filling equipment (watering can filling) is not permitted.
If this is not observed, there is a risk of component damage or engine damage.
The filling specification must be observed.
It is essential to visually check the vacuum filling equipment before use to check that it is functioning correctly and clean.
It is not permissible to operate the vehicle if the filling procedure has not been fully completed. Otherwise there may be functional limitations (degradation) or overheating.
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.
If this is not observed, there is a risk of component damage or engine damage.
The filling specification must be observed.
It is essential to visually check the vacuum filling equipment before use to check that it is functioning correctly and clean.
It is not permissible to operate the vehicle if the filling procedure has not been fully completed. Otherwise there may be functional limitations (degradation) or overheating.
A bleeding procedure is required after a part has been exchanged in the cooling system and/or after refilling the cooling system.
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
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.
- Remove the vacuum filler device from the coolant expansion tank of the high-temperature coolant system.
- Open the bleeder screw on the coolant expansion tank for the high-temperature coolant circuit and close it again after approx. 10 s.
- Adjust the filling level in the coolant expansion tank of the high-temperature cooling system to the maximum mark.
- Close the sealing cap on the coolant expansion tank of the high-temperature cooling circuit.
NOTE:
TECHNICAL INFORMATION
Do not use a high-voltage charger.
Do not use a high-voltage charger.
- Connect battery charger.
- Switch the ignition on.
- Switch on low-beam headlights and hazard warning lights.
- For automatic transmissions: Select the selector lever position P (Park) and operate the parking brake.
- Check that the driving experience switch is not set to ECO PRO switch position.
- Set the heating to the maximum temperature and the blower to the lowest setting.
- Floor the accelerator pedal and hold for 10 s.
The automatic cooling system bleeding routine will be initiated.
- Start engine.
- Run engine for approx. 1 min at an idle speed of 850 rpm.
- Step on the accelerator pedal up to approximately 3000 rpm and hold the engine speed for 5 s.
- Hold idle speed for 10 s.
- Step on the accelerator pedal up to approximately 3000 rpm and hold the engine speed for 5 s.
- Hold idle speed for 10 s.
- Step on the accelerator pedal up to approximately 3000 rpm and hold the engine speed for 5 s.
- Hold idle speed for 10 s.
- Step on the accelerator pedal up to approximately 3000 rpm and hold the engine speed for 5 s.
- Hold idle speed for 10 s.
- Step on the accelerator pedal up to approximately 3000 rpm and hold the engine speed for 5 s.
- Step on the accelerator pedal up to approximately 1200 rpm
and hold the engine speed for 10 min.
The cooling system bleeding routine has finished approximately 11 min after the engine starts.
- Switch off engine.
- Allow the engine to cool down.
- Adjust the filling level in the coolant expansion tank of the high-temperature cooling system to the maximum mark.
- Close the sealing cap (1) until the arrows are flush.
Follow-up work