FORD 2013 Mustang v.3 - Manual (Page 202)

3. Unclamp the top from the windshield header by pulling each latch
handle down and then rotating the latch to the rear until it clears the
header.
Note: If the top has not been opened for some time and sticks to the
windshield header, push the front of the top up slightly with your hand
to loosen it.
4. Press and hold the convertible
top switch on the overhead console
until the windows are completely
down and the top is completely
stored.
Convertible Top (If Equipped) 201
2013 05+ Mustang (197)
Owners Guide gf, 3rd Printing
USA (fus)