See also:

3.5L V6 Ecoboost engine
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Resuming a set speed
Press and release RESUME. This will automatically return the vehicle to the previously set speed. ...

Breaking-in your vehicle
Your vehicle does not need an extensive break-in. Try not to drive continuously at the same speed for the first 1,000 miles (1,600 km) of new vehicle operation. Vary your speed frequently in order ...