Lexus IS 250C 2014 - Dynamic Radar Cruise Control

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2-4. Using other driving systems
Dynamic radar cruise control

Dynamic radar cruise control supplements conventional cruise control
with a vehicle-to-vehicle distance control. In vehicle-to-vehicle distance
control mode, the vehicle automatically accelerates or decelerates in
order to maintain a set following distance from vehicles ahead.
Indicator
Display
Set speed
Distance switch
Cruise control switch
: If equipped