Speed control

Speed control  - Driver Controls - Lincoln MKZ Owners Manual - Lincoln MKZ

With speed control set, you can maintain a set speed without keeping your foot on the accelerator pedal.

WARNING: Do not use the speed control in heavy traffic or on roads that are winding, slippery or unpaved.

See also:

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Conditions of operation
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Fuel quality
If you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of “Regular” unleaded gasoline. Do not add aftermarket fuel additive ...