Jeep 2015 Grand Cherokee SRT - Owner Manual - Manual (Page 422)

• Firm Mode (Available in terrain positions SPORT and
TOW) — Provides a firm suspension for better han-
dling.
• Full Firm (Available in TRACK mode) — Provides a
full firm suspension for an aggressive track experience.
Launch Mode — If Equipped
This system maximizes acceleration traction for straight
line racing. To use Launch Mode please follow the steps
below:
1. Bring vehicle to complete stop on a level track surface
with the engine running.
2. Set the steering wheel for straight ahead driving.
3. Fully press the brake pedal.
4. Press and release the “LAUNCH” Button.
5. Press the accelerator pedal to the floor.
NOTE: If the cluster launch DID message indicates all
conditions are correct for launch and the throttle is
pressed to the floor quickly (within approximately 1/2
second) the system will hold the engine speed to a preset
speed (below the engine rev limiter speed).
6. Release the brake pedal.
Pressing the launch control button when launch control is
active will deactivate launch control.
NOTE:
• Launch Mode brings the engine to optimum RPM and
waits for the driver to release the brake. Launch Mode
then uses engine throttle only to achieve controlled
wheelslip for maximum acceleration through 62 mph
(100 km/h).
• Launch Mode can be initiated in any of the Select Trac
Modes.
420 STARTING AND OPERATING