Remove the heat exchanger for the coolant

Precondition

The battery chargers are disconnected.
Trunk lid is open.

Ignition is switched off.

Vehicle has gone to sleep (rest state).

WARNING: High-voltage system .
The high-voltage system works with dangerous electrical voltage and high currents flow. 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:
61 00... SAFETY INSTRUCTIONS ON HANDLING HYBRID CARS .
For additional information see:
61 25... NOTES ON REPAIR OF HIGH-VOLTAGE BATTERY UNIT .

NOTE: TECHNICAL INFORMATION
Make sure the vehicle has gone to sleep before de-energizing the high-voltage system.
Observe a waiting period of at least 2 minutes.

Preliminary work

Refer to REMOVING FRONT RIGHT COVER IN TRUNK .
Refer to DE-ENERGIZING THE HIGH-VOLTAGE SYSTEM .
Refer to CHECKING THAT NO VOLTAGE IS APPLIED .
Refer to DISCONNECTING FRONT RIGHT BATTERY GROUND LEAD IN TRUNK .
Refer to REMOVING THE THROTTLE BODY .
Refer to REMOVING THE INTAKE PLENUM .
Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT OF THE DRIVE .
Refer to DRAINING COOLANT FOR THE HIGH-TEMPERATURE COOLANT CIRCUIT OF THE RANGE EXTENDER .

Unlock the coolant hose (1) and disconnect it from the heat exchanger.
Unlock the coolant hose (2) and disconnect it from the range extender electrical machine electronics (REME).
Set both coolant hoses aside.

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Loosen screw (1).
Set the grounding cable (2) aside.

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Loosen screws (1).

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Unfasten clamp (1).
Disconnect the coolant hose (2) from the T-piece.
Unlock and disconnect the coolant hose (3) below the heat exchanger
Detach the spring strap clamp (4) and disconnect the coolant line from the heat exchanger.
Feed out and remove the heat exchanger (5) together with the coolant hose (2).

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