RAM ProMaster 2014 Owner's Manual page 182

180 UNDERSTANDING YOUR INSTRUMENT PANEL
• ECONOMY MODE
If economy mode is desired, press the A/C button to turn
OFF the indicator light and the A/C compressor. Then,
select Panel, Bi-Level or Floor mode and move the
temperature control to the desired temperature.
Rear Window Defrosting
Press the Rear Defrost button to activate heated rear
window defrosting.
This function switches OFF automatically after about 20
minutes or when the engine is turned OFF. It is not
switched on automatically the next time the engine is
started.
If equipped, press the Rear Defrost button to activate
defrosting of door mirrors and heated nozzles.
NOTE: Do not affix stickers to the inside of the heated
rear window over the heating filaments, to avoid damage
that might cause them to stop working properly.