See also:

Deposit control gasoline (detergent additives)
Volvo recommends the use of detergent gasoline to control engine deposits. Detergent gasoline is effective in keeping injectors and intake valves clean. Consistent use of deposit control gasolines ...

Symbols and messages in the display
...

Disarming the alarm
- Press the Unlock button on the remote key. > Two short flashes from the car's direction indicators confirm that the alarm has been deactivated and that all doors are unlocked. ...