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 will help ensure good drivability and fuel economy. If you are not sure whether the gasoline contains deposit control additives, check with the service station operator.
NOTE
Volvo does not recommend the use of external
fuel injector cleaning systems.
See also:
Use of Additives
With the exception of gas line antifreeze during
winter months, do not add solvents, thickeners,
or other store-bought additives to your
vehicle's fuel, cooling, or lubricating systems.
Overuse ...
Returning to mode I from mode II
With the remote key fully pressed into the ignition
slot, press START/STOP ENGINE briefly. ...
Checking settings
The current Collision Warning settings can be checked by pressing MY CAR on the
center console control panel and going to Settings Car settings Driver support systems
Collision Warning. ...
