Engine Temperature Control Actuator -N493-, REMOVING AND INSTALLING: Removing

-- Drain the coolant. Refer to DRAIN THE COOLANT .

Audi A4/A5: 

Fig 1: Coolant Expansion Tank.

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-- Lift the clamps -arrows-, remove and free up the coolant hoses.

-- Disconnect the connector -1-.

-- Remove the bolt -2- and remove the coolant expansion tank -3-.

Continuation for All Vehicles: 

-- Remove the Throttle Valve Control Module -GX3-. Refer to Throttle Valve Control Module -GX3-, REMOVING AND INSTALLING .

-- Remove the coolant pump. Refer to COOLANT PUMP, REMOVING AND INSTALLING .

-- Lift the clamps -1, 2 and 3- and remove the coolant hoses.

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-- Disconnect the connector -arrow- for the Engine Temperature Control Actuator -N493-.

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-- Remove the bolts -1 to 5-.

-- Take the Engine Temperature Control Actuator -N493- off the alignment pins and remove it from the engine oil cooler.