See also:

Adjustable level of each mode
*: For type A and B audio, AUX volume can be adjusted only when an AUX audio product is connected. ...

Specifications
These specifications are subject to change without notice. ...

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 ...