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Switching off drive-ready state
Steptronic transmission
1. Engage selector lever position P with the
vehicle stopped.
2. Press the Start/Stop button.
The engine is switched off.
3. Set the parking brake.
Before driving into a vehicle wash
So that the vehicle can roll into a vehicle wash,
observe instructions for going into an auto‐
matic vehicle wash, refer to page 307.
Auto Start/Stop function
Concept
The Auto Start/Stop function helps save fuel.
The system switches off the engine during a
stop, e.g., in traffic congestion or at traffic
lights. Drive-ready state remains switched on.
The engine starts again automatically for driv‐
ing off.
General information
After every engine start via the Start/Stop but‐
ton, the Auto Start/Stop function is activated or
deactivated, according to the last setting, refer
to page 104. If the Auto Start/Stop function is
active, it is available as soon as a speed of ap‐
prox. 3 mph/5 km/h is exceeded.
Depending on the selected driving mode, refer
to page 116, the system is automatically acti‐
vated or deactivated.
Engine stop
Functional requirements
The engine is switched off automatically dur‐
ing a stop under the following conditions:
▷ The selector lever is in selector lever posi‐
tion D.
▷ The brake pedal remains pressed while the
vehicle is stationary or the vehicle is held
by Automatic Hold.
▷ The driver's safety belt is buckled or the
driver's door is closed.
General information
The air flow from the air conditioner is reduced
when the engine is switched off.
Displays in the instrument cluster
The display in the tachometer
indicates that the Auto Start/
Stop function is ready for an Au‐
tomatic engine start.
The display indicates that the
conditions for an automatic en‐
gine stop have not been met.
System limits
The engine is not switched off automatically in
the following situations:
▷ In case of a steep downhill grade.
▷ Brake not engaged strongly enough.
▷ The external temperature is high and auto‐
matic climate control is running.
▷ The vehicle's interior has not yet been
heated or cooled to the required level.
▷ If window condensation is imminent.
▷ Engine or other parts not at operating tem‐
perature.
▷ Engine cooling is required.
▷ The wheels are at a sharp angle or the
steering wheel is being turned.
▷ Vehicle battery is heavily discharged.
▷ At higher elevations.
▷ The engine compartment lid is unlocked.
▷ The parking assistant is activated.
Seite 103
Driving Controls
103
Online Edition for Part no. 0140 2 974 740 - VI/16
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