64 11 208 Replacing heat exchanger: Notes

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Necessary preliminary work:

Remove INSTRUMENT PANEL TRIM
Remove LEFT/REAR SUSPENSION CROSS-BRACE .
Remove BULKHEAD UPPER SECTION SOUND INSULATION

Recycling:

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.

IMPORTANT: Connections must not be mixed up!

Mark connection sequence of coolant hoses prior to removal.

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

Fig 1: 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.

Release screws (1). Installation note: Replace screws.

Remove cable guide holder (2) from the working area.

Fig 2: Identifying Cable Guide Holder And Screws

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NOTE: For purposes of clarity, picture shows heating and air-conditioning unit removed.

Unclip deflection arm (1) from angle positioning lever (2).

Installation note:

Deflection arm (1) must snap audibly into place!

Fig 3: Identifying Deflection Arm

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Release screws (1).

Unlock and disconnect plug connections on upper distributor housing (2).

Remove upper distributor housing (2).

Installation note:

Make sure filter housing guide lugs (3) are correctly seated in associated guide tabs on upper distributor housing (2).

Fig 4: Identifying Upper Distributor Housing And Screws

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Unclip pipe clamps(1).

IMPORTANT: Risk of contamination!

Escaping coolant must not get into the passenger compartment.

Remove water pipes (2).

Remove heat exchanger in direction of arrow.

Installation note:

Replace sealing rings.

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

Fig 5: Removing Heat Exchanger And Water Pipes

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