FORD 2008 Mustang v.3 - Manual (Page 15)

Key-in-ignition warning chime: Sounds when the key is left in the
ignition in the OFF/LOCK or ACCESSORY position and the driver’s door
is opened.
Headlamps on warning chime: Sounds when the headlamps or parking
lamps are on, the ignition is off (the key is not in the ignition) and the
driver’s door is opened.
GAUGES
Base instrument cluster gauges
Optional instrument cluster gauges
2008 05+ Mustang (197)
Owners Guide (post-2002-fmt)
USA (fus)
Instrument Cluster
15