Remove electric heater

• 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

Preliminary work 

• Remove right flap in luggage compartment TRIM PANEL .
• DE-ENERGIZE the high-voltage system.
• CHECK that no voltage is applied.
• Disconnect all battery GROUND LEADS .
• Remove THRUST FIELD .
• Remove rear UNDERBODY PROTECTION .

• Loosen screw (1).
• Guide out and remove holder (2).

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• Loosen screws (1).
• Feed the high-voltage connector (2) out and set it aside.

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

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• Unlock and disconnect plug connections (1).

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• Unclip the high-voltage cables (1) from the electric heater (2) at the marked points (3).

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• Unclip the high-voltage cable (1) from the electric heater (2) at the marked points (3).

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

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

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• Release the nut (1) and remove the potential equalization line.
• Unlock plug connection (2) and disconnect.
• Unclip the high-voltage cable (3) from the electric heater.
• Loosen screw (1).
• Loosen nut (2).

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• Lift electric heater (1) out of the ball head (2) and feed out downwards.

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• Unlock coolant hoses (1) and remove from the electric heater (2).
• Remove the electric heater (2) toward the bottom.

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