Call a locksmith.
Something is on somewhere. Check all the interior lites. Trunk lite. etc.
In the trunk.
In the trunk
Look on the driver's door, near the bottom. There is a trunk button.
No, under dash
No. The trunk is to small.
Underneath the trunk lid
Mine was under the trunk lid. When you open the trunk you can see it up underneath towards the back. A white sticker with 5 black numbers on it. '94 Grand Marquis
On a 1997 Mercury Grand marquis : The fuel pump inertia switch ( shut off switch ) is in the trunk , behind the trunk liner on the drivers side of the trunk , near the drivers side rear tail light ( there is an access hole )
On the 1999, it's on the trunk hinge on the passenger side. Open the trunk and take a look. It'll be the easiest place to check without removing anything.
Look inside the trunk. Should have a sticker on the left trunk arm.
On my 1998 Grand Marquis, the fuel shutoff swith is located on the left sidewall of the trunk. Push the button to reset.