Instruments and controls 93■ Lighting, bulb replacement■ Wiper/washer system■ Doors, windows■ Radio remote control■ Seat belts■ Airbag systems■ Engine and transmission■ Tyre pressure■ BatteryVehicle messages on theColour-Info-DisplaySome important messages appearadditionally in theColour-Info-Display. Somemessages only pop up for a fewseconds.Warning chimesWhen starting the engine orwhilst drivingOnly one warning chime will sound ata time.The warning chime regardingunfastened seat belts has priorityover any other warning chime.■ If seat belt is not fastened.■ If a door or the tailgate is not fullyclosed when starting off.■ If a certain speed is exceeded withparking brake applied.■ If a programmed speed isexceeded.■ If a warning message or a warningcode appears in the DriverInformation Centre or Graphic-Info-Display.■ If the parking assist or advancedparking assist detects an object.■ If the reverse gear is engaged andthe rear end carrier extended.When the vehicle is parked and/or the driver's door is opened■ When the key is in the ignitionswitch.■ With exterior lights on.During an Autostop■ If the driver's door is opened.Battery voltageWhen the battery voltage is runninglow, a warning message or warningcode 174 will appear in the DriverInformation Centre.1. Switch off immediately electricalconsumers which are not requiredfor a safe ride, such as seatheating, heated rear window orother main consumers.2. Charge the battery by drivingcontinuously for a while or byusing a charging device.The warning message or warningcode will disappear after the enginehas been started two timesconsecutively without voltage drop.If the battery cannot be recharged,have the cause of the fault remediedby a workshop.