See also:

Returning to mode I from mode II
With the remote key fully pressed into the ignition slot, press START/STOP ENGINE briefly. ...

Loss of a remote key
If either of the remote keys is lost, the other should be taken with the car to a Volvo retailer. As an anti-theft measure, the code of the lost remote key must be erased from the system. NOTE ...

On and Off
In certain situations, it may be desirable to switch City Safety™ off, such as when driving in close quarters where leaves, branches, etc. may obscure the hood and windshield. When the engine is ...