FORD 2006 Explorer v.1 - Manual (Page 18)

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).
GAUGES
Speedometer: Indicates the
current vehicle speed.
Engine coolant temperature
gauge: Indicates engine coolant
temperature. At normal operating
temperature, the needle will be in
the normal range (between “H” and
“C”). If it enters the red section, the
engine is overheating. Stop the
vehicle as soon as safely possible,
switch off the engine and let the engine cool.
Instrument Cluster
18