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49
Auto Start/Stop Function
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Auto Start/Stop Function
When the vehicle stops, e.g. at a traffic light or in a
traffic jam, the engine automatically stops, provided
all the requirements for the auto stop function are
met. In addition, the engine can also stop automati-
cally when the vehicle stops while moving at walking
speed. In this way, the automatic Start/Stop function
helps to save fuel.
The ignition remains on, even when the engine is
stopped automatically. All safety functions continue
to operate.
Adaptive cylinder control
Adaptive cylinder control automatically deactivates
3 cylinders under certain conditions in order to
increase energy efficiency.
3-cylinder operation affects the engine noise.
Switching off adaptive cylinder control
e
Switch off the Auto Start Stop function.
f
Please see chapter „Switching the Auto Start
Stop function on and off“ on page 50.
Prerequisites for the auto engine
stop
b
Auto Start/Stop function switched on.
b
Luggage compartment lids are closed.
b
Engine, transmission, and air conditioning have
reached operating temperature.
b
The vehicle has traveled at least at walking speed
since the last auto engine stop.
b
Vehicles with PDK
:
Brake pedal pressed.
Selector lever in position
D
,
N
, or
P
or manually
selected drive position
1
or
2
.
b
Vehicles with manual transmission
:
Seat belt fastened and driver’s door closed.
Gear lever in neutral and clutch pedal released.
Vehicles with manual transmis-
sion: engine stop and start
Engine stop
1.
Brake the vehicle with the footbrake.
2.
Move the gear lever to neutral.
3.
Release the clutch pedal.
The engine stops.
Engine start
b
Seat belt fastened.
b
Driver’s door closed.
e
Press the clutch pedal.
You can drive off normally.
Vehicles with PDK: engine stop
and start
Engine stop
1.
Brake the vehicle with the footbrake.
2.
Press and hold the footbrake.
– or –
While stationary, move selector lever to
P
.
Engine start
b
Selector lever in position
P
,
D
,
N
or manually
selected gear
1
or
2
.
e
Release the footbrake (not in selector lever
position
P
).
– or –
Press the accelerator pedal.
– or –
Move the steering wheel.
– or –
Select PDK selector lever position
R
.
You can drive off normally.
Reaction after leaving the vehicle (selector
lever position P selected)
If the driver leaves the vehicle after the engine has
been stopped automatically and PDK selector lever
position
P
is engaged (driver’s door open and
footbrake released) e.g., to open the garage door, the
engine is
not
started automatically.
If the driver enters the vehicle again at the latest
30 seconds after leaving it, (driver’s door closed and
brake actuated), Auto Start Stop mode is resumed.
If any of these prerequisites is not satisfied, the
vehicle must be started
manually
. A message is
displayed on the multifunction display indicating that
the engine needs to be started manually.
f
Please see chapter „Warning and Information
Messages“ on page 253.
Information
In certain situations, the engine is started automati-
cally, e.g., if the vehicle is rolling forward or in order to
maintain a comfortable temperature.
Information
In certain situations, the engine is started automati-
cally, e.g., if the vehicle is rolling forward or in order to
maintain a comfortable temperature.
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