Cadillac 2005 XLR Owner's Manual page 133

Selecting the Follow Distance (GAP)
When the system detects a slower moving vehicle, it will
adjust your vehicle's speed and maintain the follow
distance (gap) you select.
Press the top of the button to increase the distance or
the bottom of the button to decrease the distance.
The first button press will show you the current follow
distance setting on the HUD. Your current follow
distance setting will be maintained until you change it.
There are six follow distances to choose from. The follow
distance selection ranges from near to far (1 second to
2 seconds follow time). The distance maintained for a
selected follow distance will vary based on vehicle speed.
Use the GAP button on
the steering wheel to
adjust the follow distance.
The faster the vehicle speed the further back you will
follow. Consider traffic and weather conditions when
selecting the follow distance. The range of selectable
distances may not be appropriate for all drivers and
driving conditions. If you choose to travel at a distance
farther than Adaptive Cruise Control allows, disengage
the system and drive manually.
A graphic on the HUD indicates the selected follow
distance. This picture shows a maximum follow distance.
The vehicles will move closer as you select a smaller
follow distance.
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