Lincoln 2008 Navigator - Manual (Page 415)

Parking brake ON warning chime: Sounds when the parking brake is
set, the engine is running and the vehicle is driven more than 3 mph
(5 km/h).
Turn signal chime: Sounds when the turn signal lever has been
activated to signal a turn and not turned off after the vehicle is driven
more than 1.5 miles (2.4 km).
Message center activation chime: Sounds when some warning
messages appear in the message center display for the first time.
Reverse warning chime (if equipped): Sounds when the vehicle is in
reverse. Refer to the Driving chapter for more information.
GAUGES
Speedometer: Indicates the
current vehicle speed.
2008 Navigator (nav)
Owners Guide (post-2002-fmt)
USA (fus)
Instrument Cluster
17