Ford Grand Marquis Owner's Manual page 164

On vehicles equipped with Air
Suspension, turn OFF the Air Suspension
switch prior to jacking, hoisting or towing
your vehicle.
The air suspension switch — located on the right-hand
vertical trim panel
Driving with an Automatic
Overdrive Transmission
The automatic overdrive transmission operates
very much like a regular automatic transmission,
except it offers the extra overdrive feature.
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