See also:

Warning symbols on the battery
NOTE A used battery should be disposed of in an environmentally responsible manner. Consult your Volvo retailer or take the battery to a recycling station. ...

Fuel Formulations
Do not use gasoline that contains lead as a knock inhibitor, and do not use lead additives. Besides damaging the exhaust emission control systems on your vehicle, lead has been strongly linked ...

Automatic relocking
If the doors are unlocked, the locks will automatically reengage (re-lock) and the alarm will rearm after 2 minutes unless a door or the trunk has been opened. ...