Selecting trailer ball
Use the correct trailer ball for your application.

1. Trailer ball load rating
Matches or exceeds the gross trailer weight rating of the trailer.
2. Ball diameter
Matches the size of the trailer cou- pler. Most couplers are stamped with the required trailer ball size.

3. Shank length
Protrudes beyond the bottom of the lock washer and nut by at least 2 threads.
4. Shank diameter
Matches the ball mount hole diam- eter size.
See also:
Quick reference (“Destination” screen)
The “Destination” screen allows you to search for a destination. To display the
“Destination” screen, push the “DEST” button.
1. “Address”
A house number and the street address c ...
Turning the Automatic Sound Levelizer (ASL) on/off
Turning the “TUNE/SEL” knob clockwise turns on the ASL, and turning the “TUNE/SEL”
knob counterclockwise turns off the ASL.
ASL automatically adjusts the volume and tone quality according t ...
Locking or unlocking the phone book
Select “Phonebook Lock (Phbk Lock)”
or “Phonebook Unlock (Phbk Unlock)” using a voice command or the “TUNE/SEL” knob.
Input the PIN by either of the following
methods and select “ ...
