See also:

What you should know about automotive fuels
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Signal indicator mirrors (if equipped)
When the turn signal is activated, the outer portion of the appropriate mirror housing will blink. This provides an additional warning to other drivers that your vehicle is about to turn. ...

Windows and wiper blades
The windshield, rear and side windows and the wiper blades should be cleaned regularly. If the wipers do not wipe properly, substances on the vehicle’s glass or the wiper blades may be the cause. ...