Flushing overview

WARNING: 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:
SAFETY INSTRUCTIONS ON HANDLING HYBRID CARS .
For additional information see:
NOTES ON REPAIR OF HIGH-VOLTAGE BATTERY UNIT .

WARNING: Hot fluids .
Risk of scalding!

Conduct all work in the vehicle wearing appropriate personal protective equipment only.

CAUTION: Refrigerant circuit under high pressure .
Injury hazard!

Note and follow safety instructions on containers.
Avoid contact with refrigerant; wear safety goggles and hand protection.
For additional information see: SAFETY INSTRUCTIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A , or INSTRUCTIONS FOR HANDLING R1234YF REFRIGERANT and NOTES FOR REPAIR WORK ON AIR CONDITIONING .

NOTE: TECHNICAL INFORMATION
The refrigerant circuit must be flushed in the following case only:
With a mechanical fault of the air conditioning compressor and the resulting shavings contribution in the refrigerant circuit .
If necessary, the refrigerant circuit can be flushed in the following cases:

If the refrigerant circuit was open for more than 24 h (e.g., after an accident),
If there are doubts about the correct amount of refrigerant oil in the refrigerant circuit,
If the refrigerant circuit is contaminated.

NOTE: TECHNICAL INFORMATION
Flush the refrigerant circuit in the direction of flow.
Observe the operating instructions for the A/C service station.
Read and comply with NOTES ON REPLACING AIR CONDITIONING COMPRESSOR, DETERMINING THE AMOUNT OF REFRIGERANT OIL .
Follow instructions for opening and replacing parts in refrigerant circuit.

NOTE: TECHNICAL INFORMATION
There are not enough adapters in the tool set to flush the refrigerant circuit. The adapters must be ordered separately.

Preliminary work

Refer to REMOVING FLAP IN LUGGAGE COMPARTMENT TRIM PANEL ON RIGHT .
Refer to DE-ENERGIZING THE HIGH-VOLTAGE SYSTEM .
Refer to CHECKING THAT NO VOLTAGE IS APPLIED .
Refer to DRAINING AND CLEAN THE OIL RESERVOIR OF THE A/C SERVICE STATION .
Refer to SUCTION THE AIR CONDITIONING .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING THE TOP LEFT COVER IN THE ENGINE COMPARTMENT , and REMOVING THE TOP RIGHT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING UPPER CROSS CONNECTION .
Refer to REMOVING THE TENSION STRUT AT THE SHOCK TOWER ON THE LEFT AND RIGHT .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to REMOVING THE INTAKE FILTER HOUSING (TENSION STRUT ON SHOCK TOWER REMOVED) .
Refer to REMOVING CLEAN AIR PIPE AND RESONATOR .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING FAN COWL .
Refer to REMOVING CHARGE AIR LINE .
Refer to DETACHING BELT PULLEY .
Refer to REMOVING THE DRIVE BELT FOR COOLANT PUMP .
Refer to REMOVING THE TENSIONING PULLEY FOR THE COOLANT PUMP .
Refer to REMOVING HOLDER FOR COOLANT LINES .
Refer to REMOVING THE ENGINE CONTROL UNIT COVER .
Refer to REMOVING THE AIR CONDITIONING CONDENSER PARTIALLY .
Refer to RELEASING THE LOW-TEMPERATURE COOLANT EXPANSION TANK .
Refer to DISCONNECTING REFRIGERANT LINE ON THE CONNECTING PIECE .
Refer to REMOVING THE ELECTRIC A/C COMPRESSOR (EKK) .
Refer to VISUAL INSPECTION OF THE DRAINED REFRIGERANT OIL FROM THE AIR CONDITIONING COMPRESSOR .
Refer to CARRY OUT A VISUAL INSPECTION OF THE DRAINED REFRIGERANT OIL IN THE A/C SERVICE STATION OIL RESERVOIR .
Refer to REMOVING THE ENGINE CONTROL UNIT COVER .
Refer to REMOVING THE BRACKET FOR THE DME CONTROL UNIT .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE FRONT LOWER WHEEL ARCH COVER .
Refer to REMOVING A/C CONDENSER .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING THE HOLDER FOR THE CABLE TENSION RELIEF .
Refer to DISCONNECTING THE REFRIGERANT LINE FROM THE EXPANSION VALVE .
Refer to REMOVE EXPANSION VALVE .
Refer to SECURING THE REFRIGERANT LINE TO THE CONNECTING PIECE .
Refer to REMOVING THE FRONT CONNECTING SUPPORT ON THE TUNNEL .
Refer to REMOVING THE UNDERSHIELD (TANK COVER) ON THE LEFT .
Refer to REMOVING THE UNDERSHIELD (TANK COVER) AT RIGHT .
Refer to REMOVING SIDE UNDERBODY PLANKING .
Refer to REMOVING REAR UNDERBODY PROTECTION .
Refer to REMOVING THE REFRIGERANT SHUTOFF VALVE FOR THE HIGH-VOLTAGE BATTERY .
Refer to REMOVING THE EXPANSION VALVE FOR THE HIGH-VOLTAGE BATTERY UNIT .
Refer to REMOVING THE EXPANSION VALVE FOR THE HIGH-VOLTAGE BATTERY UNIT ON THE RIGHT .

Observe the additional information.
64 50... Flushing overview