See also:

State emission testing (U.S. only)
WARNING Testing of an All-Wheel Drive vehicle must NEVER be performed on a single two-wheel dynamometer. Attempting to do so will result in uncontrolled vehicle movement and may cause an accident ...

Before checking or servicing in the engine compartment
WARNING ● Always stop the engine and apply the parking brake to prevent the vehicle from moving. ● Always let the engine cool down. Engine parts become very hot when the engine is ru ...

Mirrors
Always check that the inside and outside mirrors are properly adjusted before you start driving. ...