88 Instruments and controlsengine is running, a gear isengaged and the foot brake is notdepressed.■ Warning signal sounds three timesif the rear carrier system isextended and reverse gear isselected.When the vehicle is parked andthe driver's door is opened■ When the key is in the ignitionswitch.■ With exterior lights on.■ For manual transmissionautomated, if the parking brake isnot applied and no gear is engagedwhen the engine is switched off.During an Autostop■ If the driver's door is opened.Battery voltageLow battery voltage in the radioremote control. On vehicles withoutcheck control, the message InSP3appears in the instrument paneldisplay. Replace the battery 3 20.Brake light switchBrake light does not come on duringbraking. Have the cause of the faultremedied immediately by aworkshop.Drain diesel fuel filterIf there is water in the diesel fuel filter,the message InSP4 appears in theinstrument panel. In some modelsInSP4 illuminates together with A inthe instrument. Consult a workshop.LightingImportant exterior lighting lamps,including cables and fuses, aremonitored. In trailer mode, trailerlighting is also monitored. Trailerswith LED lighting must have anadapter that enables lamp monitoringas with conventional bulbs.The failed lighting will be indicated inthe information display or themessage InSP2 will appear in theinstrument panel display.
