22 Keys, doors and windowsBasic settingsSome settings can be changed in theInfo-Display.Vehicle personalisation 3 105.Radio remote control batteryreplacementReplace the battery as soon as therange reduces.Batteries do not belong in householdwaste. They must be disposed of atan appropriate recycling collectionpoint.Extend the key and open the unitsideways. Replace the battery(battery type CR 2032), payingattention to the installation position.Close the unit and synchronise.Radio remote controlsynchronisationAfter replacing the battery, unlock thedoor with the key in the driver's doorlock. The radio remote control will besynchronised when the ignition isswitched on.Memorised settingsWhenever the key is removed fromthe ignition switch, the followingsettings are automatically memorisedby the key:● lighting● electronic climate control● presets for Infotainment system● central locking system● comfort settingsThe saved settings are automaticallyused the next time the memorised keyis inserted into the ignition switch andturned to position 1 3 133.A precondition is that Personalizationby driver is activated in the personalsettings of the Info-Display. This mustbe set for each key used.Vehicle personalisation 3 105.Central locking systemUnlocks and locks doors, loadcompartment and fuel filler flap.