To remove

Remove the upper engine cover.

Fig 1: Identifying Upper Engine Cover
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Undo the cap on the expansion tank to release pressure, retighten the cap.

Fig 2: Illustration For Steps 2, 3 And 5
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Unplug the connector to the coolant temperature sensor.
Have some paper ready to collect any spilled coolant.
Remove the coolant temperature sensor. Use 83 96 087 SOCKET, COOLANT TEMPERATURE SENSOR B207 .