Removing and installing/replacing transmission oil cooler for dual-clutch transmission (S55 engine)

Only perform this repair work after engine has cooled down.

Necessary preliminary tasks: 

• Remove front UNDERBODY PROTECTION .
• Remove STIFFENING PLATE .

Recycling 

Transmission oil emerges when engine oil lines are detached from transmission oil cooler.

Catch and dispose of escaping transmission oil in a suitable container.

Observe country-specific waste disposal regulations.

Removal: 

Release screws (1) from engine oil cooler (2).

Secure engine oil cooler (2) against falling out.

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Release screws (1).

Remove cover (2) from module carrier.

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Unlock transmission oil lines (1) and detach.

Remove transmission oil cooler downwards.

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Installation: 

Install transmission oil cooler from below.

Connect and lock transmission oil lines (1).

Transmission oil lines (1) must audibly engage.

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Install cover (2) on module carrier.

Tighten down screws (1).

Tightening torque 17 10 11AZ .

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Tighten screws (1) of engine oil cooler (2).

Tightening torque 17 22 3AZ .

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Required follow-up work: 

• Install STIFFENING PLATE .
• Install FRONT UNDERBODY PROTECTION .
• Check OIL LEVEL in dual-clutch transmission.

Top up transmission oil if necessary.