Acura 2012 ZDX Owner's Manual page 227

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Hill start assist system
Hill start assist feature helps to prevent the vehicle from rolling on inclines as you
move your foot from the brake pedal to the accelerator.
Move the shift lever to D or S when facing uphill, or R when facing downhill,
then release the brake pedal.
The brakes remain engaged briefly as you release the brake pedal.
uuWhen DrivinguStarting the Engine
1Hill start assist system
Hill start assist may not prevent the vehicle from
rolling downhill on a very steep or slippery slope, and
will not operate on small inclines.
Hill start assist is not a replacement for the parking
brake.
Hill start assist will operate even when VSA is
switched off.
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