2008 Jeep Commander Owner Manual - Page 285

STARTING AND OPERATING 285 Electronic Range Select (ERS)Operation The Electronic Range Select (ERS) shift control allows you to move the shifter left (-) or right (+) when the shifter is in the D (Drive) position, allowing the selection of the desired top gear. For example, if the driver shifts the transmission into 3 (third gear), the transmission will never shift above third gear, but can shift down to 2 (second) or 1 (first), when needed. When in the D (Drive) position, the first tap to the left (-), will show the current gear. For example, if you are in D (Drive) and are in 3rd gear, when you tap the gear shift one time to the left (-), the display will show 3. Another tap to the left (-) will shift the transmission into 2nd gear. If you are in D (Drive) and are in 5th gear, the first tap to the left (-) will display 5. Another tap to the left (-) will shift the transmission into 4th gear. On vehicles equipped with 4.7L or 5.7L engines, use of ERS (or Tow/Haul mode) also enables a additional underdrive gear which is not normally used during through-gear accelerations. This additional gear improves vehicle performance and cooling capability when towing a trailer on certain grades. In ERS mode (on all transmissions), 1st through 3rd gear are underdrive gears and 4th gear is direct drive. ERS 5th gear (Overdrive) is the same as the normal 4th gear. WARNING! Do not downshift for additional engine braking on a slippery surface. The drive wheels could lose their grip and the vehicle could skid. Screen Display Actual Gear(s) Allowed 1 1 2 1-2 3 1-3 4 1-4 5* 1-5 D 1-5 5 * Applies to vehicles equipped with 4.7L/5.7L engines only.