Mercury Sable 2003 Owner's Manual page 37

Lights
4. Remove the protective dust shield
from the housing by turning the
dust shield counterclockwise (when
viewed from the rear).
5. Disconnect the electrical
connector from the bulb by pulling
rearward.
6. Remove the bulb retaining ring by
rotating it counterclockwise.
7. Remove the old bulb from the
lamp assembly by pulling it straight
out of the lamp assembly.
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