Decals

There are various types of decals in the vehicle whose purpose is to provide important information in a clear and concise way. The importance of these decals is explained as follows, in descending order of importance.
Risk of injury

Black ISO symbols on a yellow warning background, white text/image on a black background.
Decals of this type are used to indicate potential danger. Ignoring a warning of this type could result in serious injury or death.
Risk of damage to the vehicle

White ISO symbols and white text/image on a black or blue warning background and space for a message. If the information on decals of this type is ignored, damage to the vehicle could result.
Information

White ISO symbols and white text/image on a black background. These decals provide general information.
Test yourself
A quick Volvo XC60 quiz: every answer comes with an explanation and a link to the manual page.