208 Vehicle careControl indicator w 3 107.Vehicle messages 3 114.If the tyre pressure shall be reducedor increased, switch off ignition.If a complete set of wheels withoutsensors is mounted (e.g. four wintertyres), a message is displayed in theDriver Information Centre. The tyrepressure monitoring system is notoperational. Retrofitting of sensors ispossible.A spare wheel or temporary sparewheel is not equipped with pressuresensors. The tyre pressuremonitoring system is not operationalfor these wheels. Control indicator willuminates. For the further threewheels the system remainsoperational.The use of commercially availableliquid tyre repair kits can impair thefunction of the system. Factoryapproved repair kits can be used.External high-power radio equipmentcould disrupt the tyre pressuremonitoring system.The tyre pressure monitoring systemvalve cores and sealing rings must bereplaced each time the tyres arechanged.Adaptive threshold functionThe tyre pressure monitoring systemautomatically detects if the vehicle isdriven with a tyre pressureappropriate for a load of up to3 people or for a full load.If the tyre pressure shall be reduced,switch off ignition before reducing.Auto learn functionAfter changing wheels the vehicle hasto be stationary for approx.20 minutes, before the systemrecalculates. The following relearnprocess takes up to 10 minutes ofdriving with a minimum speed of12 mph. In this case $ can bedisplayed or pressure values canswap in the Driver Information Centre.If problems occur during the relearnprocess a warning message isdisplayed in the Driver InformationCentre.Temperature compensationCold tyres decrease the tyrepressure, warm tyres increase thetyre pressure. The tyre pressuremonitoring system considers thiseffect for the warning messages.The tyre pressure value displayed inthe Driver Information Centre showsthe actual tyre pressure. Therefore itis important to check tyre pressurewith cold tyres.Tread depthCheck tread depth at regularintervals.Tyres should be replaced for safetyreasons at a tread depth of 2-3 mm(4 mm for winter tyres).For safety reasons it is recommendedthat the tread depth of the tyres onone axle should not vary by more than2 mm.
