2008 Jeep Liberty Owner's Manual - Page 308

308 STARTING AND OPERATING WARNING! Abrasive material in any part of the brakes may cause excessive wear or unpredictable braking. You might not have full braking power when you need it to prevent an accident. If you have been operating your vehicle in dirty conditions, get your brakes checked and cleaned as necessary. • If you experience unusual vibration after driving in mud, slush, or similar conditions, check the wheels for impacted material. Impacted material can cause a wheel imbalance and freeing the wheels of it will correct the situation. PARKING BRAKE To set the parking brake, pull the lever up as firmly as possible. When the parking brake is applied with the ignition ON, the "Brake Warning Light" in the instrument cluster will light. To release the parking brake, pull up slightly, press the center button, then lower the lever completely. NOTE: The instrument cluster "Brake Warning Light" indicates only that the parking brake is applied. You must be sure the parking brake is fully applied before leaving the vehicle.