TCS/Grade Assist Indicator
WARNING: This page is about a different car, the 2013 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
The TCS/Grade Assist indicator is located in the Instrument Cluster (IC).
It tells the driver that shifting into 6th gear is prevented by the transaxle control.
The O/D/Grade Assist light flashes to tell the driver that the transaxle control has switched to the emergency operating mode.