See also:

Parking on a grade
Always block the wheels under both vehicle and trailer when parking. Apply the parking brake firmly. You should not park on a hill or slope. But if parking on a hill or slope cannot be avoided ...

Airflow selection
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Taking a phone call and declining an incoming call
To take a phone call: Press the OFF hook switch . To put an incoming call on hold: Press the ON hook switch briefly. To decline an incoming call: Press the ON hook switch for more than 1.5 seconds ...