120 Driving and operatingBefore restarting or to switch off theengine, turn the key back to position0.During an Autostop, the engine canbe started by depressing the clutchpedal.Key lock releaseSome vehicles with an automatictransmission are equipped with anelectronic key lock release system.The key lock release is designed toprevent ignition key removal unlessthe selector lever is in P.Starting the vehicle at lowtemperaturesStarting the engine without additionalheaters is possible down to -25 °С fordiesel engines and -30 °C for petrolengines. Required is an engine oilwith the correct viscosity, the correctfuel, performed services and asufficiently charged battery. Withtemperatures below -30 °C theautomatic transmission requires awarming phase of approx. 5 minutes.The selector lever must be in positionP.Automatic Starter ControlThis function controls the enginestarting procedure. The driver doesnot have to hold the key in position 3.Once applied, the system will go onstarting automatically until the engineis running. Because of the checkingprocedure, the engine starts runningafter a short delay.Possible reasons for a non-startingengine:■ Clutch pedal not operated (manualtransmission)■ Brake pedal not operated orselector lever not in P or N(automatic transmission)■ Timeout occurredTurbo engine warm-upUpon start-up, engine availabletorque may be limited for a short time,especially when the enginetemperature is cold. The limitation isto allow the lubrication system to fullyprotect the engine.Overrun cut-offThe fuel supply is automatically cut offduring overrun, i.e. when the vehicleis driven with a gear engaged butaccelerator is released.Stop-start systemThe stop-start system helps to savefuel and to reduce the exhaustemissions. When conditions allow, itswitches off the engine as soon as thevehicle is at a low speed or at astandstill, e.g. at a traffic light or in atraffic jam. It starts the engineautomatically as soon as the clutch isdepressed. A battery sensor ensuresthat an Autostop is only performed ifthe battery is sufficiently charged fora restart.ActivationThe stop-start system is available assoon as the engine is started, thevehicle starts-off and the conditionsas stated below in this section arefulfilled.