2002 Mercury Grand Marquis Owner Guide 1st Printing - Page 101

Locks and Security All of the vehicle doors will lock and unlock to confirm programming of the new code. Do not set a code that includes five of the same number or presents them in sequential order. Thieves can easily figure out these types of codes. You can program up to three personal codes to unlock your vehicle. These codes do not replace the permanent code that the dealership gave you. Erasing personal code To erase all of the personal entry codes programmed to a vehicle: 1. Enter the factory-set code. 1 2 3 4 5 6 7 8 9 0 2. Press and release 1/2 within 5 seconds of step 1. 3. Press and hold 1/2 for two seconds. All of the vehicle doors will lock and then unlock to confirm erasure. Unlocking the doors and releasing the trunk with the keyless entry system To unlock the driver door, enter either the factory-set code or personal code (each digit pressed within 5 seconds of prior digit). The interior lamps will illuminate. To unlock all doors, enter the factory-set code or personal code 1 2 3 4 5 6 7 8 9 0 (driver door unlocks) and press 3/4 within five seconds. 101