Install complete drive unit

Check 

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• Check the support bearings (4) for damage on the left and right.

  Result 

  » Support bearing is damaged.

  Measure

  • Replace the support bearing.
• Position the drive unit on the vehicle with the help of the mobile lifting table.
  NOTE: Perform the steps on the right and left side.
• Replace the screw (3).

  Parts:  Screw

• Tighten the bolt (3) on the support bearing (4).

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  TIGHTENING TORQUES SPECIFICATION
  
  

  Left tappet bearing to electrical machine transmission mounting bracket
  M12 Replace screw.	Joining torque	96 Nm
  	Angle of rotation	120°
  M14		165 Nm

  TIGHTENING TORQUES SPECIFICATION
  
  

  Tappet bearing, right to transmission mounting bracket
  M12 Replace screw.	Joining torque	96 Nm
  	Angle of rotation	45°
  M14		165 Nm

• Position the stop pad (2) and tighten the screws (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Stop pad to Drive module
  M6	Tightening torque	12 Nm

• Loosen nut (1).
• Remove the special tool 2 357 221 with the bolt and washer (2) from the electrical machine (3).

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• Position the engine anti-roll bar (3).
• Tighten down screws (2).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Anti-roll bar link to Drive module/electrical machine
  M12	Tightening torque	100 Nm

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• Tighten down screw (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Anti-roll bar link to Drive module/electrical machine
  M12	Tightening torque	100 Nm

• Lower the mobile lifting table.
• Position the coolant lines (2) in the clamp (1).
• Lock clamp (1).

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• Connect and lock the coolant line (1) of the electrical machine electronics (EME).
• Connect and lock the coolant line (2) of the electrical machine.
• For SA4U6 multi-phase alternating current rapid charging and SA4U8 alternating current rapid charging: 

  Feed in the coolant line (3) of the convenience charging electronics (KLE).

  lip in the coolant line (4) of the convenience charging electronics (KLE).

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• Connect and lock the connector (1) of the wiring harness.

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  For vehicle versions from 12/2014 

• Position the cable duct (2) and tighten the screws (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Cable routing to drive module
  M6	Tightening torque	12 Nm

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• Attach the snap-in lugs (arrows) of the cable duct (1) on the Drive module (2).

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• Insert the high-voltage cable with the conduit toward the top.
• Position the high-voltage cable and clip in the cable clip (1).
• Tighten down screws (2).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Cable routing, high-voltage cable to drive module
  M6	Tightening torque	12 Nm

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  For vehicle versions up to 12/2014 

• Insert the high-voltage cable with the conduit (2) toward the top.
• Tighten the bolts (1) on the conduit (2).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Cable routing, high-voltage cable to drive module
  M6	Tightening torque	12 Nm

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• Release the mounting of the air conditioning compressor (6) on the drive module (7).
• Replace screws (5).

  Parts:  Screws

• Tighten screws (5) on the air conditioning compressor (6).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Air conditioning compressor to electrical machine housing
  M6 Replace screws.	Tightening torque	7.6 Nm

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• Connect and lock the high-voltage cable connector (4).
• Connect and lock the connector (3) of the signal line.
  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.
• Tighten the equipotential bonding line (2) with the screw (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Potential equalization line to air conditioning compressor
  M6	Tightening torque	19 Nm

  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.

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• Tighten the equipotential bonding line on the transmission mounting bracket (1) with the screw (2).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Potential equalization line on transmission mounting bracket
  M6	Tightening torque	12 Nm

  Connect the cables to the electrical machine electronics (EME) 

• Connect the connector (6) of the electric auxiliary heater.
• Connect the connector (5) of the charging power socket and/or convenience charging electronics (KLE).
• Clip the battery ground lead and the positive battery cable into the holders (arrows).
• Tighten the nut below the cover (4).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Positive battery cable to electrical machine electronics (EME)
  M8	Tightening torque	15 Nm

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• Secure cover (4).
  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.
• Position the battery ground lead and tighten the nut (3).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Battery ground lead to electrical machine electronics (EME)
  M8	Tightening torque	15 Nm

• Connect the connector (2) of the 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.
• Position and tighten the potential equalization line (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Potential equalization line to Drive module
  M6	Tightening torque	12 Nm

  Install the tension relief 

• Tighten the screws (2) on the holder for the tension relief.
  TIGHTENING TORQUES SPECIFICATION
  
  

  Holder for tension relief to electrical machine electronics and sheet metal bracket
  M6	Tightening torque	8 Nm

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• Position the tension relief.
• Tighten the screws (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Tension relief to holder for tension relief
  M6	Tightening torque	8 Nm

Follow-up work 

• Refer to CHECK/TOPPING UP TRANSMISSION OIL IN THE ELECTRIC MACHINE TRANSMISSION .
• Refer to REPLACING THE RADIAL SHAFT SEAL ON THE ELECTRIC MACHINE TRANSMISSION .
• Refer to CHECKING THE GEARING OF THE OUTPUT SHAFT .
• Refer to INSTALLING RIGHT OUTPUT SHAFT .
• Refer to INSTALLING LEFT OUTPUT SHAFT .
• Refer to MOUNTING CONTROL LINK AND CAMBER CONTROL ARM ON THE WHEEL CARRIER .
• Refer to MOUNTING THE TRAILING ARM ON THE WHEEL CARRIER .
• Refer to RELEASING SPRING STRUT SHOCK ABSORBER FROM WHEEL CARRIER .
• Refer to TIGHTENING THE THREADED CONNECTION OF THE TOE LINK, CAMBER LINK, AND TRAILING LINK TO THE NORMAL POSITION .
• Refer to SECURING SPRING STRUT SHOCK ABSORBER ON THE WHEEL CARRIER .
• Refer to INSTALLING THE OUTPUT SHAFT ON THE WHEEL BEARING .
• Refer to GREASE THE WHEEL HUB .
• Refer to ONLY WITH SA4U7 DIRECT CURRENT QUICK CHARGING AND SA4U6/SA4U8 ALTERNATING CURRENT QUICK CHARGING: INSTALLING THE CONVENIENCE CHARGING ELECTRONICS (KLE) .
• Refer to INSTALLING VERTICAL STRUT .
• Refer to INSTALLING REAR CROSS-MEMBER .
• Refer to INSTALLING THE HORIZONTAL STRUT ON THE LEFT AND RIGHT .
• Refer to INSTALLING UNDERBODY PROTECTION .
• Refer to INSTALLING SUPPORT FOR THE REAR BUMPER PANEL .
• Refer to INSTALLING REAR BUMPER PANEL .
• Refer to INSTALLING NUMBER PLATE LIGHT .
• Refer to MOUNTING LICENSE PLATE .
• Refer to CLOSING THE LOW-TEMPERATURE COOLANT CIRCUIT OF THE DRIVE .
• Refer to INSTALLING THE REAR LEFT AND RIGHT WHEELS .
• Refer to INSTALLING SERVICE CAP IN TRUNK .
• Refer to INSTALLING LUGGAGE COMPARTMENT FLOOR COVERING .
• Refer to CONNECTING FRONT RIGHT BATTERY GROUND LEAD IN TRUNK .
• Refer to ACTIVATING HIGH-VOLTAGE SYSTEM .
• Refer to FILLING AND VENTING THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to INSTALLING FRONT RIGHT COVER IN TRUNK .