Necessary preliminary tasks

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Remove HEATER

Release screws (1).

Slide rubber grommet (1) with foam seal forward slightly.

Carefully feed pipe holder (3) with pipes (4) past rubber grommet (2).

Installation:

If necessary, replace rubber grommet (1) and/or foam seal.

Make sure rubber grommet (1) is correctly seated on pipe holder (3).

Fig 1: Sliding Rubber Grommet With Foam Seal Forward

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If necessary, remove coolant hose (2).

Release screws (3) and remove cover.

NOTE: Diesel version only:

Unfasten plug connection (1) and disconnect.

Withdraw electric auxiliary heater (4) in direction of arrow.

Remove heat exchanger (5) from heater/air conditioner (6).

Fig 2: Removing Heat Exchanger From Heater/Air Conditioner

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Release screws (1) and slide screw clamps (2) forwards slightly.

Remove pipes (3) from heat exchanger (4).

Installation:

Replace sealing rings.

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

Fig 3: Sliding Screw Clamps

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IMPORTANT: Inflow connection (3) may only be positioned at the bottom.
When installing, make sure that the return-flow connection (2) (larger opening) marked with a black dot (1) is positioned at the top.
Inflow connection (3) accordingly may only be positioned at the bottom.

Fig 4: Identifying Return-Flow Connection With Black Dot

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