VECI Decal
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
Each vehicle has a VECI decal (Fig 1) containing emission control information that applies specifically to the vehicle and engine. The specifications on the decal are critical to servicing emissions systems.