Horn
Press 
on the steering wheel pad to sound the horn.
See also:
Tire Terminology and Definitions
Air Pressure: The amount of air inside the tire pressing outward on each square
inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per
square inch).
Accessory Weight: ...
Retrieve My Number
1. Push . System responds:
“OnStar ready.”.
2. Say “My Number.” System
responds: “Your OnStar
Hands-Free Calling number is.” ...
Tailored design weaves in signature style and refinement
The 2013 ATS interprets Cadillac's Art & Science design language in a new
proportion, tailoring the signature styling and refinement cues for the most
compact Cadillac while upholding - and ad ...