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Each vehicle with keyless entry has its own factory code
there is a "wallet card" which has the code on it, if you do not have this card you will need to bring the car into a Mercury dealer and they will "plug it in" and retrieve the factory preset code.
You will find a sticker in the trunck with the factory code printed on it.
Just a long shot, but check inside the trunk for a sticker.
Keyless entry will have a keypad built into the driver's door handle.
The Marquis does not have a standard code. A dealer may be able to supply the factory code for the exact car, unless the code was owner changed.
Factory places it on the Lift Rod in the trunk. Some owners write it in the owner's manual. If the sticker is not there, you'll need to go to a dealership to get the master code.
Every vehicle with keyless entry has it's own factory code
Each vehicle has its own factory code
No , each vehicle has it's own factory keyless entry code
Each vehicle with keyless entry has its own factory code
the keyless entry code is inside the cover in the back where the rear windshield washer container is