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:
Hazard warning flashers
Hazard warning flashers
The four-way flasher should be used to indicate
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Replacing the low beam bulb (halogenheadlights)
1. Remove the plastic cover over the bulb by
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2. Pull the connector from the lamp housing.
3. Loosen the bulb's retaining spring by first
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Styling
I've been a fan of the Volvo S40's face since it was last redesigned, and I'm
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