See also:

Symbols and messages in the display
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Anti-lock brakes (ABS)
If the ABS warning lamp lights up there is a malfunction in the ABS system (the standard braking system will however function) and the vehicle should be driven cautiously to a trained and qualifie ...

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 gasol ...