Mercury 2002 Villager Owner's Manual page 70

Climate Controls
The rear A/C fan speed control allows rear passengers to control the
volume of air that is distributed from the rear registers.
REAR
A/C
The rear seat A/C system is controlled from the main climate control
system on the instrument panel. Ensure that the control is set to REAR
A/C to engage the rear passenger compartment air conditioning system.
HI
OFF A/C
MAX
OFF REAR 1 2 3 4
TEMP
A/C
LO
AUTOMATIC
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