2010 Jeep Commander Owner's Manual - Page 250

250 STARTING AND OPERATING Electronic Range Select (ERS)Operation The Electronic Range Select (ERS) shift control allows you to move the shift lever left (-) or right (+) when the shift lever is in the DRIVE position, allowing you to limit the highest available gear. For example, if the driver shifts the transmission into ERS 3 (third gear), the transmission will never shift above third gear, but can shift down to 2 (second) or 1 (first), when needed. NOTE: • If you pull and hold (not tap) the shift lever to the left (-), the transmission will downshift to the lowest gear that can be attained without overrevving the engine. The display will show the gear the vehicle is in and will limit the top gear to the one displayed. 3.7L Engine When in the DRIVE position, the first tap to the left (-), will shift down one gear and will display that gear. For example, if you are in DRIVE and are in 5th gear, when you tap the shift lever one time to the left (-), the transmission will downshift to 4th gear and the display will show 4. Another tap to the left (-) will shift the transmission into 3rd gear. 5.7L Engine On vehicles equipped with 5.7L engines, use of ERS (or TOW/HAUL mode) also enables an 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. ERS 1,2, and 3 are underdrive gears; ERS 4 • If you pull and hold (not tap) the shift lever to the right is direct drive. ERS 5 (Overdrive) is the same as the normal (+), the transmission will exit the gear limiting mode 4th gear. When in the DRIVE position in 1st through 4th and shift to the appropriate gear. The display will read gear, the first tap to the left (-), will display the ERS D. designation for the current gear (the transmission will not