Necessary preliminary tasks

Read out fault memory
Disconnect NEGATIVE BATTERY CABLE
Remove MICROFILTER HOUSING
Remove TENSION STRUT ON SPRING STRUT DOME ON RIGHT

Release screws (1).

Slacken nut (2).

Lift out right heater end plate (3).

Installation:

Ensure gasket (4) is correctly seated.

Fig 1: Lifting Out Right Heater End Plate

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Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 2: Unlocking Electronic Box Locks

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Disconnect plug connection (1).

Unlock plug connection (2) in direction of arrow and disconnect.

Pull wiring harness grommet (5) out of electronics box and remove wiring harness (4).

Pull wiring harness grommet (3) out of electronics box and remove wiring harness with equipment carrier (6).

Installation:

Make sure wiring harness grommets (3, 5) are correctly seated in electronics box.

Fig 3: Unlocking Plug Connection

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If necessary, press locking tabs (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 4: Pressing Carrier Locking Tabs

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If necessary, press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 5: Pressing Locking Tabs

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Release screws (1).

Read fault memory.
Disconnect NEGATIVE BATTERY CABLE
Remove MICROFILTER HOUSING
Remove TENSION STRUT ON SPRING STRUT DOME ON RIGHT

Release screws (1).

Slacken nut (2).

Lift out right heater end plate (3).

Installation:

Ensure gasket (4) is correctly seated.

Fig 1: Lifting Out Right Heater End Plate

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Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 2: Unlocking Electronic Box Locks

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Lift out plug connection (2), fuse carrier (3) and wiring harness grommet (4) from electronics box (1).

Installation:

Make sure wiring harness grommets (4) are correctly seated in electronics box (1).

Fig 3: Identifying Electronics Box With Plug Connection, Fuse Carrier And Wiring Harness Grommet

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Unlock DME control unit at holders (1) and raise slightly.

Pull tab (3) in direction of arrow out of housing and disconnect plug connections (2) on DME control unit.

Fig 4: Pulling DME Control Unit Tabs

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If necessary, press locking tabs (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 5: Pressing Carrier Locking Tabs

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If necessary, press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 6: Pressing Carrier Locking Tab

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Unlock device holder (2) at holder (1) and remove.

Remove DME control unit (3).

Fig 7: Removing DME Control Unit

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Unlock device holder (2) at holder (1) and remove.

Fig 8: Identifying DME Control Unit Holders

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Remove device holder (1) from electronics box.

Fig 9: Identifying DME Control Unit Holder

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Release screws (1).