A mounting system for releasably securing a portable electronic device (Preferably a DVD entertainment device) within an automobile. A harness is designed to securely attach the portable electronic equipment to the back of an automobile seat. The harness includes a headrest strap that wraps around the upper portion of the seat, while a second strap wraps around the base of the vertical backrest portion of the seat and is connected to the housing at a third location. The harness is preferably limited to a three-point attachment between each end of the headrest strap and the housing, and a third connection between the housing and the base strap. A crossover strap may be employed to form an intermediate connection between the base strap and the housing.