Removing Heater/Air-Conditioning Unit

→ Disconnect the battery.

→ Prevent battery from reconnecting.

→ Cover the battery.

→ Remove ground terminal and cover the terminals.

→ Route electric lines without tensile strength.

→ Secure electric lines to existing lines/components.

Fig 1: Overview Of Heater/Air-Conditioning Unit

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1. Support the heater/air-conditioning unit under the centre section -A-  and under the evaporator -B-  with a plastic or wooden board.
   Fig 2: Identifying Heater/Air-Conditioning Unit

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2. Unclip wiring harness on the left heat exchanger cover.
   Fig 3: Unclipping Left Heat Exchanger Cover Wiring Harness

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3. Unscrew both fastening screws on the left heat exchanger cover and unclip the cover.
4. Unscrew the fastening screw of the right heat exchanger cover and unclip the cover.
   Fig 4: Removing Right Heat Exchanger Cover Fastening Screw

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5. Pull the retaining clips -arrows A-  off the coolant supply line and return line.
   Fig 5: Pulling Off Retaining Clips On Coolant Lines

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   Information 

   • Line the driver's footwell with very absorbent material. 
6. Pull the interior carpet away from the coolant lines and place a suitable collecting container in position.
   Fig 6: Pulling Interior Carpet Away From Coolant Lines

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7. -arrows B-  Slowly pull out the lines from the heat exchanger and drain the coolant into the collecting container.
8. Unscrew both centre air guide fastening screws -4-  for the back seat area and pull out the upper air guide toward the rear -arrow A-  and the lower one toward the front -arrow B-  .
   Fig 7: Releasing Centre Air Guide

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9. Pull out centre air vents on the left -A-  and right -B-  .
   Fig 8: Removing Left And Right Air Vents

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10. Turn the left and right temperature sensor -90°-  and pull out of the heater/air-conditioning unit.
    Fig 9: Releasing Temperature Sensor

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11. Pull the centre air vents for the footwell downwards from the heater/air-conditioning unit, lift it toward the rear, and pull it out of the air vents for the footwell.
12. Release the electric central connector -A-  (-arrows a-  ), lever apart the connector lock -B-  with two screwdrivers and pull off.
    Fig 10: Pulling Off Electric Central Connector

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    Information 

    • Make sure not to damage the insulation of the main wiring harness. 
13. The main wiring harness is secured to the heater/air-conditioning unit with tie-wraps. Separate the tie wraps carefully with side cutters.
    Fig 11: Cutting Through Main Wiring Harness Tie-Wraps On Heater/Air-Conditioning Unit

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14. The main wiring harness runs along the right A-pillar and is secured to the heater/air-conditioning unit in the fan area with a tie-wrap. Separate the tie wrap carefully with side cutters.
    Fig 12: Cutting Through Tie-Wrap In Fan Area

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15. Disconnect the water drainage hose from the air-conditioning unit.
    Fig 13: Disconnecting Water Drainage Hose From Air-Conditioning Unit

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16. Detach the main wiring harness on the heater/air-conditioning unit.
    Fig 14: Detaching Main Wiring Harness On Heater/Air-Conditioning Unit

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17. Grasp the heater/air-conditioning unit on the left and right, pull backwards about 5 cm and remove completely.