When doing replacement or upgrading on 2006 Lincoln Zephyr with capsule halogen headlamps HID, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2006 H11
High Beam Headlight 2006 H7
Front Fog Light 2006 H8/H11/H16
Back Up Light 2006 921
Dome Light 2006 578
Front Side Marker 2006 168
Front Turn Signal 2006 4157NA
License Plate 2006 6418
Rear Turn Signal 2006 3157NA
Center High Mount Stop Light 2006 921
Glove Box 2006 194
Trunk 2006 578
Low Beam Headlight 2006 D1S
High Beam Headlight 2006 H7
Front Fog Light 2006 H8/H11/H16
Back Up Light 2006 921
Dome Light 2006 578
Front Side Marker 2006 168
Front Turn Signal 2006 4157NA
License Plate 2006 6418
Rear Turn Signal 2006 3157NA
Center High Mount Stop Light 2006 921
Glove Box 2006 194
Trunk 2006 578