85In struments, ControlsPicture no: 18385s.tif>Front fog lig hts 3Control indicator illum inates in green.It is illuminated when the front fog lightsare on – see page 106.AEng ine electr oni cs,tra nsm ission electronic s, immob iliser,diesel fuel filter 3, Easyt ronic 3, faultControl indicator illum inates or flashes inyellow.It illuminates for a few seconds when theignition is switched on.Picture no:Illum inates when the engine is running:Fault in eng ine or gearbox electronicsy stem. Electronics hav e switched toemergency running programm e. Fuelconsumption may be increased a nd thevehicle’s driveab ility reduced, seepage 147. C ontact a workshopimmed iately.For vehicles w ith a diesel engine, the dieselfuel filter m ay need to be drained of water,see p age 230.If it flashes when the ignition is on:Fault in the electronic im mobiliser sy stem;the engine cannot be started –see p age 27.ZExhaust emi ssionC ontrol indicator illuminates or flashes inyellow.It illuminates w hen the ignition is switchedon and g oes out shortly after the enginestarts.If it illuminates w hen the engine is running:Fault in emission c ontrol system. Thepermitted emissions may be ex ceeded.C ontact a workshop immediately.If it flashes when the engine is running:Fault which could lead to damag e to thecataly tic conv erter, see pa ge 147. Contacta work shop imm ediately.vAirb ag system s 3 ,b elt tensionersC ontrol indicator illuminates in red.If it illuminates w hen the engine is running:Fault in the airbag or belt tensionersystems, see pa ges 60, 72.