There is no fuel pump reset button on a 1999 Mercury Marquis (or virtually any car). Fuel pumps don't have reset buttons in the way some other electronic components might. If your fuel pump isn't working, the problem is likely a malfunctioning pump, a faulty fuel pump relay, a bad fuel pump fuse, a problem in the wiring, or even a low fuel level (though that usually triggers a low fuel light, not a complete pump failure).
You'll need to diagnose the problem using a multimeter to check fuses, relays, and wiring, or have a mechanic perform diagnostics. Simply pressing a non-existent button won't fix a mechanical or electrical issue.
