Remove the electrical machine electronics (EME)

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 .

WARNING: Potential equalization in high-voltage system .
Mortal hazard if the potential equalization screw connection is not correct!

Observe the safety requirements for potential equalization screw connection.
Clean contact faces and have then checked by a second person.
Tighten the screws/nuts for equipotential bonding with torque; have a second person check the torque.
Correct execution of this work must be documented by both persons in the vehicle records.

WARNING: Car may slip off the vehicle hoist where components are supported .
Danger! Immobilization period-threatening injuries!

Secure the vehicle hoist against lowering and lifting.
Make sure that the vehicle does not lift off the mounting plates on the vehicle lift.

NOTE: RISK OF DAMAGE
Damage to the electric machine transmission .
Failure to comply with the oil specifications can result in serious damage to the electric machine transmission .

After completion of repair work, check the transmission oil level in the electric machine transmission.
Only use approved transmission oil for the electric machine transmission.

NOTE: TECHNICAL INFORMATION
For additional information see:
SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY
NOTES FOR DISCONNECTING AND CONNECTING THE VEHICLE BATTERY
NOTES ON INTELLIGENT BATTERY SENSOR (IBS)

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.

NOTE: TECHNICAL INFORMATION
Notes about unlocking and disconnecting various plug connections in electric vehicles and hybrid vehicles are the basis of these repair instructions and compliance with same is absolutely mandatory.
For additional information see: UNLOCKING AND DISCONNECTING VARIOUS PLUG CONNECTIONS IN ELECTRICAL AND HYBRID VEHICLES

NOTE: TECHNICAL INFORMATION
Perform wheel alignment after installation.

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 LUGGAGE COMPARTMENT FLOOR COVERING .
Refer to REMOVING SERVICE CAP IN TRUNK .
Refer to REMOVING THE REAR LEFT AND RIGHT WHEELS .
Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT OF THE DRIVE .
Refer to ON VEHICLES WITH RANGE EXTENDER: REMOVING THE COVER FROM THE ENGINE COMPARTMENT .
Refer to REMOVING LICENSE PLATE .
Refer to REMOVING NUMBER PLATE LIGHT .
Refer to REMOVING REAR BUMPER PANEL .
Refer to REMOVING SUPPORT FOR THE REAR BUMPER PANEL .
Refer to REMOVING UNDERBODY PROTECTION .
Refer to REMOVING THE HORIZONTAL STRUT ON THE LEFT AND RIGHT .
Refer to REMOVING REAR CROSS STRUT .
Refer to REMOVING WHEEL ARCH COVER .
Refer to REMOVING COMPLETE EXHAUST SYSTEM .
Refer to REMOVING INTAKE SILENCER HOUSING .
Refer to REMOVING ENGINE COMPARTMENT FAN .
Refer to REMOVING VERTICAL STRUT .
Refer to REMOVING THE CONVENIENCE CHARGING ELECTRONICS (KLE) .
Refer to REMOVING RANGE EXTENDER ELECTRICAL MACHINE ELECTRONICS (REME) .
Refer to IF INSTALLED: REMOVING THE HUB CAP .
Refer to LOOSENING THE OUTPUT SHAFT FROM THE WHEEL BEARING .
Refer to RELEASING TRAILING ARM ON WHEEL CARRIER .
Refer to DISCONNECTING CONTROL LINK AND CAMBER CONTROL ARM FROM THE WHEEL CARRIER .
Refer to REMOVING LEFT OUTPUT SHAFT .
Refer to REMOVING RIGHT OUTPUT SHAFT .
Refer to CHECKING THE OUTPUT SHAFT BELLOWS FOR TWISTING AND/OR DAMAGE .
Refer to COMPLETELY REMOVING THE DRIVE UNIT WITH THE RANGE EXTENDER .

Connection overview of electrical machine electronics (EME)

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Detach the high-voltage cable from the attachment points (1) .
Unscrew the bolts (2) and remove the support (3) .

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Unscrew the bolts (1) and remove the sheet metal bracket from the electrical machine electronics (EME) (2) .

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Detach the clamps (1) and remove the sound insulation (2) .

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Unscrew the bolt (1) at the ground connection of the wiring harness.
With SA4U7 direct current quick charging or SA4U8 alternating current quick charging:
Unlock and disconnect the connector of the high-voltage cable (2) .

Unclip the high-voltage cable (2) of the convenience charging electronics (KLE) from the holders (arrows) and feed them out.
Disconnect the signal line (3) .
Detach the wiring harness (4) from the attachment points (arrows).
Disconnect the high-voltage cable (5) of the electric A/C compressor (EKK).
For SA4U8 alternating current quick charging:
Disconnect the high-voltage cable (6) of the convenience charging electronics (KLE).
- On vehicles with range extender
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Release screw (1) of the potential equalization line.
Unlock and disconnect the coolant line (2) .

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Detach the clamp (1) and pull the coolant hose off.
Unscrew the bolt (2) and remove the potential equalization line.
Loosen clamps (3) .
Loosen the screw (4) and remove the line clip.

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Detach and remove the high-voltage cable of the electric A/C compressor (EKK) from the attachment point (1) .
Detach the clamps (2) of the sound insulation (3) .
Feed out the sound insulation (3) and remove it.

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Unscrew the bolts (1) and remove the service cap (2) .

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NOTE:
RISK OF DAMAGE
Contaminant or foreign body .
Contamination can result in malfunctions, loss of function or leaks .
- Adhere to the utmost cleanliness.
- Protect components from contamination e.g. by covering.
- Close off line connections with seal plugs.
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Unscrew the bolts (1) of the high-voltage cables.
Disconnect the plug connection (2) .
If necessary, remove bolts and foreign bodies from the electrical machine.
Unscrew the bolts (1) on the electrical machine electronics (EME) (2) .

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Unscrew the bolts (1) on the electrical machine electronics (EME) (2) .

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Carefully place the electrical machine electronics (EME) (1) into the special tool 2 356 938 .
Cover the open connection area of the electrical machine.

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