Ford Mustang Owner's Manual page 27

Instrument Cluster
TOP SPEED MYKEY SETTING — Displayed when a MyKey™ is in
use and the MyKey speed limit is on and the vehicle speed is 80 mph
(130 km/h). Refer to MyKey™ in the Locks and Security chapter for
more information.
BUCKLE UP TO UNMUTE AUDIO — Displayed when a MyKey™ is in
use and Belt-Minder is activated. Refer to MyKey™ in the Locks and
Security chapter for more information.
ADVTRAC ON MYKEY SETTING — Displayed when a MyKey™ is in
use when trying to disable the AdvanceTrac system and the optional
setting is on. Refer to MyKey™ in the Locks and Security chapter for
more information.
1→4 SHIFT FOR FUEL ECONOMY — Displayed on manual
transmission vehicles when the vehicle determines that shifting directly
to 4th gear from 1st gear will improve fuel economy. Refer to Manual
transmission operation in the Driving chapter for more information.
27
2011 05+ Mustang (197)
Owners Guide, 1st Printing
USA (fus)