2012 Jeep Grand Cherokee Owner Manual - Page 434

432 STARTING AND OPERATING right (-/+) while in the DRIVE position will select the PARK highest available transmission gear, and will display that This range supplements the parking brake by locking the transmission. The engine can be started in this range. gear in the instrument cluster as 6, 5, 4, 3, 2, 1. Never attempt to use PARK while vehicle is in motion. Apply the parking brake when leaving vehicle in this range. When parking on a level surface, you may place the shift lever in the PARK position first, and then apply the parking brake. When parking on a hill, apply the parking brake before placing the shift lever in PARK, otherwise the load on the transmission locking mechanism may make it difficult to move the shift lever out of PARK. As an added precaution, turn the front wheels toward the curb on a downhill grade and away from the curb on an uphill grade. Shift Lever Gear Ranges DO NOT race the engine when shifting from PARK or NEUTRAL into another gear range.