The tyre pressure monitoring system keeps a check on the inflation pressures of the four road wheels while you are driving.
The system warns the driver in the event of a loss of pressure by means of the warning lamps 
and 
and messages in the instrument cluster display. The system employs sensors on the wheels. The radio signals from these sensors are transmitted to the tyre pressure monitoring system.
and and messages in the instrument cluster display. The system employs sensors on the wheels. The radio signals from these sensors are transmitted to the tyre pressure monitoring system.Please bear in mind that the tyre inflation pressure is also influenced by the temperature of the tyre. For every 10°C increase in the tyre temperature the pressure will normally increase by about 0.1 bar. The tyre heats up while the vehicle is being driven and the tyre pressure will rise accordingly. For this reason, you should only adjust the tyre pressures when they are cold (i.e. approximately at ambient temperature).
The MMI display will show the current tyre temperatures and pressures Link.
Monitoring of the tyre pressures is based on the tyre pressures you have stored. The system cannot detect how heavy the load is. Each time you change a tyre, change the wheels round or change the tyre pressures on your vehicle (e.g. when switching from partial load to full load and vice-versa), you must store the new tyre pressures on the MMI Link. The tyre pressures recommended for your vehicle are given on the sticker attached to the driver's door pillar Link.
- Never re-adjust the tyre inflation pressure when the tyre is hot. This can cause serious damage to the tyre or even a blow-out, which could result in an accident.
- Under-inflated tyres flex more and can overheat at continuous high speeds. This can cause tread separation and tyre blow-out, which could result in an accident.
For the sake of the environment
Under-inflated tyres lead to increased fuel consumption and tyre wear.
Note
- Responsibility for ensuring that the tyres are correctly inflated remains with the driver; the system can only provide assistance.
- Only adjust the inflation pressure of the tyres when they are at approximately ambient temperature.
- The sensors and valves do not have to be detached or changed round when fitting new tyres. Only the valve core needs to be replaced, and if necessary the valve and the electronic components in the wheel.
- After using the tyre repair kit*, the tyre pressure monitoring system may malfunction. The sensor for the tyre pressure monitoring system must therefore be renewed by a qualified workshop.
- The tyre pressure monitoring system on your Audi is specially matched to tyres with the marking "AO" or "RO". We recommend that you use these tyres.