Uite ce am gasit: The tyre pressure control system, or RDC as it is also known, regularly monitors the tyre pressures of all four wheels. RDC employs sensors to monitor tyre pressures both at a standstill and when the car is being driven. If RDC registers a change in tyre pressure an indicator light in the instrument cluster lights up (see below) or, if applicable, a check control message is issued. Technology There is an electronic unit behind the tyre valve in each wheel. The components of this electronic unit are: a pressure sensor a transmitter a battery as power supply. The pressure sensor measures the tyre pressure at short intervals and transmits this information by radio to the body. An aerial in the body receives the signals from the corresponding wheel. Central electronics analyse the signals from all four wheels and report changes. RDC's initial response to an irregularity is to shorten the time between measurements. In this way the system can ascertain whether the irregularity is due to a transient fluctuation in pressure or a lasting deviation from the specified pressure. The system reports lasting deviations as changes in pressure. Benefit RDC monitors tyre pressures for you and issues warnings if the pressure is not as specified. Correct tyre pressures are an important factor in driving stability, so RDC enhances safety on the road.