To remove

Remove the upper engine cover.

Fig 1: Identifying Upper Engine Cover
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Place a receptacle to collect spilled oil.
Unplug the connector.

Fig 2: Illustration For Steps 3-4
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Remove the oil pressure switch. Tool 83 95 187 (27 mm fitting).