Ford Mustang Owner's Manual page 105

Adjusting Manual Seats
In the front seats, you can move the whole seat
forward or backward or tilt the back of the seat
forward or backward.
To move the seats forward or backward:
1. Find the adjustment lever at the lower left
corner of the front seat.
2. Push the lever to the left to unlock the seat.
3. Move the seat to the desired position.
4. Release the lever to latch the seat in its new
position. Make sure the seat locks securely in
place.
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