Remove the heat exchanger of the automatic transmission

Prerequisite

Any connected chargers are disconnected

Trunk lid open

Ignition off

Status in "sleep mode"

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: 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
With the ignition off and the high-voltage safety plug disconnected, the Check Control message "High voltage system faulty" is displayed by default.
The message "High-voltage system switched off" (absence of voltage) is only displayed when the ignition is switched on.

Preliminary work

Refer to REMOVING THE FLAP IN THE RIGHT-HAND LUGGAGE COMPARTMENT TRIM PANEL .
Refer to DE-ENERGIZING THE HIGH-VOLTAGE SYSTEM .
Refer to CHECKING THAT NO VOLTAGE IS APPLIED .
Refer to DISCONNECTING THE NEGATIVE BATTERY CABLE .
Refer to DISCONNECTING THE NEGATIVE BATTERY CABLE OF THE VEHICLE BATTERY .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING DESIGN COVER .
Refer to REMOVING THE RIGHT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING THE COVER IN THE LEFT ENGINE COMPARTMENT .
Refer to REMOVING TRAILING LINK AT TENSION STRUT TOWER .
Refer to REMOVING THE SOUND INSULATION ON THE BULKHEAD UPPER PART AT THE CENTER .
Refer to REMOVING CORROSION PROTECTION COVER .
Refer to REMOVING INTAKE SILENCER HOUSING .
Refer to REMOVING CLEAN AIR PIPE .
Refer to REMOVING THE VEHICLE ELECTRICAL SYSTEM SUPPORT BATTERY .
Refer to REMOVING BATTERY HOUSING (ENGINE COMPARTMENT) .
Refer to REMOVING CONTROL UNIT HOLDER .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE CENTER UNDERBODY PROTECTION .
Refer to REMOVING SIDE UNDERBODY PANELLING .
Refer to DRAINING THE COOLANT FROM THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to DRAIN THE COOLANT FROM THE HIGH-TEMPERATURE COOLING SYSTEM .
Refer to REMOVING BOTH COOLANT EXPANSION TANKS .
Refer to REMOVING CHARGE AIR LINE .
Refer to REMOVING THE INTAKE PLENUM .

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Unlock and loosen coolant line (1).
Catch and dispose of escaping coolant.

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Remove screws (arrows).
Remove the connecting rod (1).

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Loosen screws (1).
Loosen the holder (2).

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NOTE: TECHNICAL INFORMATION
Observe the additional information for unlocking and disconnecting various plug connections in electrical and hybrid vehicles!

Remove screws (arrows).
Loosen the high-voltage cable (1).

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Secure the high-voltage cable (1) using commercially available cable straps (2).

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Loosen screws (1).
Guide out and remove holder (2).

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Unlock and loosen the locks (1).
Remove the cable clip (2) and put to one side.

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Unscrew the nuts (arrows).
Unlock and loosen clamp (1).
Remove the protective plate (2).

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Unlock and loosen transmission oil lines (1).
Catch and dispose of escaping transmission oil.
Unlock and loosen coolant line (2).
Catch and dispose of escaping coolant.
Loosen screw (3).
Loosen screw (4).
Feed out the heat exchanger of the automatic transmission (5) and remove.

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