RAM TRUCK 1500 2014 Owner's Manual page 416

414 STARTING AND OPERATING
down (-) will shift the transmission down to ERS 3 (the
added underdrive gear). Once in ERS mode, tapping ERS
(-) or (+) will change the top available gear.
Column Shift Lever
Console Shift Lever
To exit ERS mode, simply press and hold the shift lever to
the right (+) (console shift) or press the ERS (+) switch
(column shift) until "D" is once again displayed in the
instrument cluster.