Ford Mustang Owner's Manual page 217

The stability control button can be
used to enable unique
AdvanceTrac modes.
Full features of the AdvanceTrac
system can be restored by pressing the stability control button again or
by turning off and restarting the engine.
When features of the AdvanceTrac
system are off, the stability control
off light will illuminate steadily.
Pressing the stability control button
again will turn off the stability
control off light.
In R (Reverse), ABS and the engine traction control and brake traction
control features will continue to function; however, ESC is disabled.
Button
functions
Default at
start-up
Button pressed
momentarily control off
Button pressed
Sport mode (if
twice; brakes
equipped)
applied
Button pressed
and held more
AdvanceTrac
than 5 seconds;
brakes applied;
no throttle
Button pressed
AdvanceTrac
again after
fully enabled
deactivation
2012 05+ Mustang (197)
Owners Guide, 3rd Printing
USA (fus)
AdvanceTrac Features
icon
Mode
status
On during
— bulb
check
Traction
On
On
On
Disabled
Off
Driving
OFF
ESC TCS
Enabled Enabled
Enabled Disabled
Enabled Enabled
Disabled Disabled
Enabled Enabled
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