1997 Mercury Sable Owner's Manual - Page 88
1997 Mercury Sable Manual
Page 88 highlights
Driving If the O/D OFF indicator light (if equipped) is flashing on and off when the vehicle is started or does not come on when the O/D OFF switch is pressed, it means there is a malfunction in your transaxle's electronic system. Contact your dealer as soon as possible or damage to the transaxle may occur. When to use D (Drive) or press the O/D OFF switch (if equipped) D (Drive) eliminates P R N D D 1 the needless shifting P R N D 2 1 back and forth between third and fourth gears that your vehicle may do when driving on hilly terrain. It also gives more engine braking than overdrive to slow your vehicle on downgrades. 2 (Second - if equipped) Use 2 (Second) for start-up on slippery roads or to give you more engine braking to slow your vehicle on downgrades. P R N D 2 1 88