Subaru Legacy BN/BS (2015-2019) Owners Manual: Power rear gate - if power rear gate does not operate properly

Rear gate (Outback) - if the rear gate cannot be opened

In the event that you cannot open the rear gate by pressing the rear gate opener button (all models) or using the power rear gate (if equipped), you can open it from inside the cargo area. ...

When the power rear gate is deactivated

CAUTION When operating the power rear gate manually, do not use excessive force. Doing so may cause a malfunction. NOTE While the power rear gate is temporarily deactivated, if ...

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Driving tips for AWD vehicles
WARNING  Always maintain a safe driving speed according to the road and weather conditions in order to avoid having an accident on a sharp turn, during sudden braking or under other similar conditions.  Always use the utmost care in driving - overconf ...