114 Driving and operating■ the battery is sufficiently chargedand in good condition■ the engine is warmed up■ the engine coolant temperature isnot too high■ the engine exhaust temperature isnot too high, e.g. after driving withhigh engine load■ the ambient temperature is not toolow■ the defrosting function is notactivated■ the climate control system allowsan Autostop■ the brake vacuum is sufficient■ the self-cleaning function of thediesel particle filter is not active■ the vehicle has moved since thelast AutostopOtherwise an Autostop will beinhibited.An Autostop may become lessavailable as the ambient temperatureapproaches the freezing point.Certain settings of the climate controlsystem may inhibit an Autostop. Seeclimate control chapter for moredetails.Immediately after motorway drivingan Autostop may be inhibited.New vehicle running-in 3 111.Battery discharge protectionTo ensure reliable engine restarts,several battery discharge protectionfeatures are implemented as part ofthe stop-start system.Power saving measuresDuring an Autostop, several electricalfeatures such as rear window heatingare disabled or switched into a powersaving mode. The fan speed of theclimate control system may bereduced to save power.Restart of the engine by thedriverDepress the clutch pedal to restart theengine.The engine start is indicated by theneedle at the idle speed position inthe tachometer.If the selector lever is shifted out ofneutral before depressing the clutchfirst, control indicator - illuminates.Control indicator - 3 79.Restart of the engine by thestop-start systemThe selector lever has to be in N toenable an automatic restart.If one of the following conditionsoccurs during an Autostop, theengine will be restarted automaticallyby the stop-start system.■ The stop-start system is manuallydeactivated■ the bonnet is opened■ the driver's seat belt is unfastenedand the driver's door is opened■ the engine temperature is too low■ the battery is discharged■ the brake vacuum is not sufficient■ the vehicle starts to move■ the defrosting function is activated
