In the 1930s Edsel Ford stirred up the idea to create another brand name that would rest comfortably between the everyman Ford and the premium Lincoln Division. By 1939, Mercury released its first model -- The Mercury Eight. Mercury vehicles were almost identical to their Ford counterparts, but they often had additional features or accessories. The Ford Explorer and the Mercury mountaineer are prime examples -- in most cases body panels were even interchangeable. One of the common options between the Mountaineer and the Explorer was a key pad on the driver's door that allowed owners to unlock the vehicle without the need for the door key. If you've forgotten your personal pin code for the keypad, you can find the stock pin code hidden away inside the vehicle.
The stock pin code is printed on the label for the anti-theft personality module that is hidden behind the interior trim on the driver side, rear quarter panel. Remove the two screws for the access panel, then remove the panel. The 5 digit code is printed in large, black letters.
