Removing the heating and air-conditioning unit

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WARNING: Hot fluids.
Risk of scalding!

Conduct all work in the vehicle wearing appropriate personal protective equipment only.

NOTE: TECHNICAL INFORMATION
Driving without the strut brace/front-end strut or tension strut is not permitted.

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

Preliminary work

Refer to SUCTIONING THE AIR CONDITIONING .
Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING THE COVER PANEL OF THE SLAVE DME CONTROL DEVICE .
Refer to REMOVING HOLDER OF DME CONTROL UNIT FOR CYLINDERS 5 TO 8 .
Refer to REMOVING COOLANT EXPANSION TANK .
Refer to REMOVING THE COVER OF THE ENGINE COMPARTMENT AT THE REAR LEFT .
Removing the cover of the rear right engine compartment.

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- Loosen the lock (1)
- Remove the cover (2).
Covering the vehicle battery
WARNING:
Unprotected battery terminals. Risk of short circuits! Risk of fire!
- Cover the vehicle battery
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NOTE: The following step(s) must be performed if the listed component(s) is/are installed.
- Cover the vehicle battery with the special tool 2 452 007 as shown.
Refer to REMOVING LEFT AND RIGHT WIPER ARM .
Refer to REMOVING THE COWL COVER .
Refer to REMOVING TRAILING LINK AT SPRING BOLT .
Refer to REMOVING THE COWL UPPER PART IN THE CENTER .
Refer to REMOVING THE COVER IN THE ENGINE COMPARTMENT ON THE LEFT .
Refer to RELEASING LEFT FRONT-END STRUT .
Refer to REMOVING LEFT INTAKE SILENCER HOUSING .
Refer to DISCONNECTING THE REFRIGERANT LINE FROM THE EXPANSION VALVE .
Refer to REMOVING EXPANSION VALVE .
Refer to REMOVING THE CONTROL PANEL OF THE REAR PASSENGER COMPARTMENT AIR CONDITIONING (INTEGRATED AUTOMATIC CLIMATE CONTROL WITH 4-ZONE CONTROL) .
Refer to REMOVING THE REAR VENTILATION GRILLE .
Refer to REMOVING THE VENTILATION GRILLE IN THE REAR (AIR CONDITIONING SYSTEM WITH 4-ZONE CONTROL) .
Refer to REMOVING THE REAR CENTER CONSOLE TRIM .
Refer to REMOVING THE CENTER ARMREST STORAGE COMPARTMENT .
Refer to REMOVING THE CENTER ARMREST .
Refer to REMOVING THE FRONT STORAGE COMPARTMENT TRIM .
Refer to REMOVING THE CENTER CONSOLE TRIM .
Refer to REMOVING CUPHOLDER .
Refer to REMOVING THE TRIM PANEL FOR PEDAL ASSEMBLY .
Refer to REMOVING FOOTWELL TRIM PANEL ON THE RIGHT .
Refer to REMOVING THE CENTER CONSOLE .
Refer to REMOVING THE SIDE PANEL ON THE RIGHT DASHBOARD .
Refer to REMOVING THE DECORATIVE STRIP ON THE RIGHT DASHBOARD .
Refer to REMOVING THE RADIO OPERATING UNIT AND THE AIR CONDITIONING CONTROL PANEL .
Refer to REMOVING HEADUNIT HIGH (HU-H) .
Refer to REMOVING THE SPEAKER TRIM AT THE DASHBOARD .
Refer to REMOVING THE MID-RANGE SPEAKER FROM THE DASHBOARD .
Refer to REMOVING BOTH INNER FRONT DOOR SILL COVER STRIPS .
Refer to REMOVING THE SIDE TRIM PANEL IN THE FOOTWELL AT THE LEFT A-PILLAR .
Refer to REMOVING THE SIDE TRIM PANEL IN THE FOOTWELL AT THE RIGHT-HAND A-PILLAR .
Refer to REMOVING A-PILLAR TRIM PANEL ON THE LEFT AND RIGHT .
Refer to REMOVING THE SIDE PANEL ON THE LEFT DASHBOARD .
Refer to REMOVING THE LIGHT OPERATING UNIT .
Refer to REMOVING THE DECORATIVE STRIP ON THE DASHBOARD ON THE LEFT .
Refer to REMOVING CENTRAL INFORMATION DISPLAY (CID) .
Refer to REMOVING LEFT FOLD-OUT COMPARTMENT .
Refer to REMOVING AIRBAG UNIT .
Refer to REMOVING AIRBAG UNIT OF THE M SPORTS STEERING WHEEL .
Refer to REMOVING STEERING WHEEL .
Refer to REMOVING STEERING WHEEL .
Refer to REMOVING STEERING COLUMN SHROUD UPPER SECTION .
Refer to REMOVING LOWERING PART OF STEERING COLUMN SHROUD .
Refer to REMOVING THE STEERING COLUMN SWITCH CLUSTER (SZL) .
Refer to REMOVING THE INSTRUMENT CLUSTER (KOMBI) .
Refer to REMOVING INSTRUMENT PANEL TRIM .
Refer to REMOVING THE SUPPORT FOR THE DASHBOARD .

Use commercially available disconnection tools to pinch off the coolant lines.

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

Release the hose clamps (1) using special tool 0 495 794 (17 2 050) and detach the coolant hoses.

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Protect the carpet in the footwell from escaping coolant.
Loosen screws (1) , (2) and (3) .
Release sealing flange (4) at the cowl (5) in the direction of vehicle interior.

Fig 1: Heating And Air-Conditioning Unit Sealing Flange Screws Loosening Sequence Installing Steering Wheel
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Unlock the detent (1) and remove the cable duct (2) .

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NOTE: Perform the steps on the right and left side.

Unlock the detents (1) and push the air duct (2) downwards.

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Unlock and disconnect the connector (1) on the blower (2) .

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For equipment specifications with electric auxiliary heater: Release the nut (1) and remove the ground cable (2) .

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Guide out and remove the heating and air-conditioning unit (1) .

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