Mont. Code Ann. § 61-8-909

A person who renders assistance in an emergency that is life-threatening to the occupant of a wrecked, disabled, or abandoned vehicle or that is creating an immediate hazard on a public roadway or who renders emergency assistance as directed by a law enforcement officer or other emergency responder at the scene of a motor vehicle accident is immune from damages arising from acts or omissions related to the rendering of assistance unless the damages are occasioned by the gross negligence or by the willful or wanton acts or omissions of the person rendering the assistance.