Tire Deflation Warning (RDW)

Tire Deflation Warning (RDW)
The RDW function is integrated (and diagnosed) in the DSC control unit. The system uses the rotation speed of the diagonally opposite wheels to compare the dynamic circumferences of all four wheels.
The RDW system does not monitor uniform air pressure loss over all 4 tires. If the pressure loss is the same in all four tires, the wheel speeds change equally and pressure loss cannot be detected. The customer must continue to check inflation pressures on a regular basis.
The system must be reinitialized if tire inflation pressures are modified or if the tires/ wheels are replaced. Initializing RDW:
1. Start the engine but do not drive away.
2. Press and hold the RDW button in the center console until the indicator light in the instrument cluster illuminates in yellow for several seconds.
3. Drive away.
After a certain distance, the system stores the new wheel speeds as reference values and is then able to display a detected deviation. RDW has an indicator light in the instrument cluster that may illuminate in yellow or red.
Indicator illuminates in red:
^ Indicates a loss of more than 30% of inflation pressure in one of the tires
^ Accompanied by a gong sound
Indicator illuminates in yellow:
^ Possible faults in the system
^ Initialization