172 Vehicle careSelect:■ Light for comfort pressure up to 3people■ Eco for Eco pressure up to 3 people■ Max for full loadingAuto 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 dependencyTyre pressure depends on thetemperature of the tyre. Duringdriving tyre temperature and pressureincrease.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.The legally permissible minimumtread depth (1.6 mm) has beenreached when the tread has worndown as far as one of the tread wearindicators (TWI). Their position isindicated by markings on thesidewall.If there is more wear at the front thanthe rear, swap round front wheels andrear wheels periodically. Ensure thatthe direction of rotation of the wheelsis the same as before.Tyres age, even if they are not used.We recommend tyre replacementevery 6 years.
