Ford 2011 Econoline Owner's Manual page 71

POSITIVE RETENTION FLOOR MAT (IF EQUIPPED)
WARNING: Do not install additional floor mats on top of the
factory installed floor mats as they may interfere with the
accelerator or the brake pedals.
Position the floor mat so that the
eyelet is over the pointed end of the
retention post and rotate forward to
lock in. Make sure that the mat does
not interfere with the operation of
the accelerator or the brake pedal.
To remove the floor mat, reverse the
installation procedure.
2011 Econoline (eco)
Owners Guide, 1st Printing
USA (fus)
Driver Controls
71