64 11 206 Removing and installing/replacing heating and air-conditioning unit: Recycling

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Coolant emerges when coolant lines are detached. Have a suitable collecting vessel ready.

Catch and dispose of escaping coolant.

Observe country-specific waste disposal regulations.

Feed out line feed-through (1) towards top.

Fig 1: Identifying Feed Out Line Penetration

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Release screws (1) and remove refrigerant lines (2) with associated gasket.

Tightening torque 64 53 1AZ .

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 2: Identifying Refrigerant Lines And Screws

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IMPORTANT: Connections must not be mixed up!
Mark connection sequence of water hoses prior to removal.

Release hose clamps (1) with special tool 17 2 050 and detach coolant hoses (2).

Fig 3: Identifying Coolant Hoses And Hose Clamps

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IMPORTANT: Carefully blow out coolant ports on the heat exchanger to remove the remaining coolant.
Close openings or line to heat exchanger with special tool 32 1 270 , to avoid media leak and dirt contamination.

Equipment specification with electric auxiliary heater only:

Release screw (1).

Remove grounding cable for electric auxiliary heater (2) from floor trim panel (3).

Fig 4: Identifying Electric Auxiliary Heater Earthing Cable, Floor Trim Panel And Screw

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NOTE: Length of earthing cable (1) must lie between points 2 and 3 and should be 230 mm to 235 mm long.
Run excess cable as shown in item (4).

Fig 5: Identifying Earthing Cable, Earthing Cable Points And Cable Item

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Unlock retaining lug (1) on gaiter (2).

Lever gaiter (2) out of guides.

Installation note:

Make sure retaining lug (1) and adjacent guides are correctly latched.

Fig 6: Identifying Lock Retaining Lug On Gaiter

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WARNING: Protect passenger compartment against emerging coolant.

Unclip air ducts (2), left and right towards bottom, from heater/air conditioner (1).

Feed out heating and air-conditioning unit (1) in direction of arrow.

Installation note:

Water drain (3) must be inserted on both sides into outlet channel (4).

Fig 7: Feeding Out Heating And Air-Conditioning Unit In Direction

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IMPORTANT: In the event of incorrect fitting, there is a risk of leakage in the passenger compartment!