2004 Mercury Mountaineer Factory set code.

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Mercury Mountaineer 2004  Owners Manuals Illuminated entry
The interior lamps illuminate when the remote entry system is used to
unlock the door(s) or sound the personal alarm.
The illuminated entry system will turn off the interior lights i

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Mercury Mountaineer 2004  Owners Manuals 2. Within five seconds press the 1•2 on the keypad.
3. Enter your personal 5-digit code. Each number must be entered
within five seconds of each other.
4. The doors will again lock then unlock to co