See also:

Horn
To sound the horn, press the center pad on the steering wheel. ...

Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)
To assist customers who are deaf, hard of hearing, or speech-impaired and who use Text Telephones (TTYs), Cadillac has TTY equipment available at its Customer Assistance Center. Any TTY user ...

Overview
Cadillac introduced the 2013 ATS, an all-new compact luxury sports sedan intended to challenge the world's best premium cars. Developed on an all-new, lightweight vehicle architecture, Cadillac's ...