Lincoln 2004 Aviator Owner's Manual page 342

Accessories
equipment installed in your vehicle should comply with FCC or CRTC
regulations and should be installed only by a qualified service
technician.
• Mobile communications systems may harm the operation of your
vehicle, particularly if they are not properly designed for automotive
use.
342
2004 Aviator f/k/a Navigator LS (231)
Owners Guide (post-2002-fmt)
USA English (fus)