Ford FOCUS 2017 Owner's Manual page 188

Towing
Note: There is no limit on towing distance.
After towing, start the engine within 15
minutes of reconnecting the battery cable.
See Changing the 12V Battery (page 223).
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Focus (CDH) Canada/United States of America, HM5J 19A321 AA enUSA, Edition date: 201608, First Printing