When active, Auto-dry brakes, also known as Rain Brake Support, help improve overall braking performance in rainy conditions by applying the brakes to reduce the amount of water on the braking surfaces. When these driving conditions are encountered, the SRX and XTS braking systems automatically applies the appropriate amount of pressure on all four wheels for 1.5 seconds to create this effect. For Auto-dry brakes to function, the following conditions must be met continuously for a distance traveled of at least 3.7 miles:
The vehicle must be travelling faster than 19 mph.
The accelerator pedal position must be greater than 10 percent.
The cruise control must be turned OFF.
Windshield wipers must be in any ON position or Rainsense wipers activated (if equipped).