Park heater upgrade vehicles with navigation and hi-line audio system. The park heat pre-heats or cools the vehicle with remote control and seven day timer. Diesel only. For vehicles with navigation and hi-line audio system. (MeridianTM Audio System (380W) with 11 speakers including subwoofer or the MeridianTM Surround Audio System (825W) with 17 speakers including subwoofer.) Only available for vehicles fitted with Telestart park heater.