Ford EVEREST 2015 Owner's Manual page 136

Transmission
Activating the Electronic Locking
Differential
Note: Do not use electronic locking
differential on dry, hard surfaced roads.
Doing so will produce excessive noise,
vibration, increase tire wear and damage to
the axle .
Note: If the electronic locking differential
has difficulty disengaging, release the
accelerator pedal and turn the steering
wheel in the opposite direction while rolling.
For 4WD vehicles
E206626
To engage the electronic locking
differential, press the centre console
mounted switch.
134
Everest (TEC), EB3B-19G219-YAA enAUS