Volvo VNL 780 Operator's Manual page 267

Power Door Locks (Optional)
Press button 2 to lock both doors or unlock the passenger door. In the event of a power
failure the electrical lock system reverts back to a mechanical functioning system.
Central Locking
The central locking is operated using a remote control. There is no alarm in this unit. The
central locking unit provides a means for the driver to electronically control the vehicle's
door locks, for increased personal safety and driver comfort.
Unlock Doors Using Remote Control
To unlock the driver door, press the UNLOCK button. The side indicators will flash.
To unlock the passenger door, press the UNLOCK button again. The side indicators will
flash.
Lock Doors Using Remote Control
Press the LOCK button. The side indicators will flash.
W8003087
OPERATION 257