59 Driving
Ignition lockIgnition key positions0Steering locked
1Steering unlocked
2Ignition switched on
3Starting the engine
Vehicles with automatic transmis-
sion:
Do not move the selector lever from
position P until the engine is running –
ignition key position 2.
Your vehicle is equipped with an inter-
lock. Therefore, the ignition key cannot
be turned to position 0 or removed until
the selector lever is in position P.<
Vehicles with manual transmis-
sion:
Step on the clutch when starting the
vehicle. A lockout prevents the engine
from starting if the clutch is not
depressed.<
Steering lockedThe key can only be inserted and
removed in this position.
After removing the key, turn the steer-
ing wheel slightly to the left or right until
the lock engages.
If the key is not removed, an acoustic
signal is sounded after the driver's door
has been opened.Steering unlockedYou will find that it is often easier to turn
the ignition key from position 0 to posi-
tion 1 when you move the steering
wheel slightly to help disengage the
lock.
Individual electrical accessories are
ready for operation.
Starting the engine
Do not allow the engine to warm
up by leaving it running while the
vehicle remains stationary. Instead,
drive off immediately at a moderate
engine speed.<
Do not allow the engine to run in
enclosed spaces. Otherwise,
breathing the exhaust fumes can lead
to unconsciousness and death. The
exhaust gases contain carbon monox-
ide, an odorless and colorless, but
highly toxic gas. Do not leave the vehi-
cle unattended with the engine running.
An unattended vehicle with a running
engine represents a safety hazard.
When driving, standing at idle or park-
ing the vehicle, take care to avoid con-
tact between the hot exhaust system
and flammable materials – grass, hay,
leaves, etc. Such contact could lead to
a fire, resulting in serious personal
injury and property damage.<
Start the engine. Do not press the
accelerator pedal.
Do not actuate the starter for too
short a time, but do not actuate it
for more than approx. 20 seconds.
Release the ignition key immediately
when the engine starts.<
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61
Switching off the engine
You should never remove the igni-
tion key when the vehicle is in
motion, as the steering lock could
engage.
When you leave the vehicle, always
remove the ignition key and engage the
steering lock.
Always engage the parking brake when
parking on slopes and inclined sur-
faces. Engaging a gear may not provide
adequate resistance to rolling.<
Vehicles with manual
transmissionTurn the ignition key to position 1 or 0.Automatic transmissionMove the selector lever into position P,
and turn the ignition key to position 1 or
0.SMG gearboxIf you turn the ignition key to position 1
or 0 with the selector lever in position
R, or in sequential mode, a gear auto-
matically remains engaged.
If you turn the ignition key to position 1
or 0 with the selector lever in neutral
position N, a warning tone and the
flashing gear indicator in the display
remind you that no gear is engaged to
secure the vehicle against rolling.
The warning stops after approx.
9 seconds.
Parking brakeThe parking brake is designed primarily
to prevent the vehicle from rolling when
it is parked. It operates on the rear
wheels.To engageThe detent engages automatically, and
the indicator lamp in the instrument
cluster comes on when the ignition key
is in position 2, refer to page 18.To releasePull up slightly on the lever, press the
button and lower the lever.
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63
Sequential manual gearbox SMG*The conceptThe sequential manual gearbox SMG is
an automated manual gearbox with
which clutching and shifting is assumed
by an electro-hydraulic system.
The SMG is operated via the selector
lever in the center console and two shift
paddles on the steering wheel.
It offers the following functions:
>Sequential mode: manual mode
>Drive mode: automatic operation
>Ability to choose between two differ-
ent driving programs: Standard,
Sport
>Operating safety through protection
against misshifting
>Automatic upshifts and downshifts in
the drive mode
>Automatic downshifts at minimum
engine rpm
>Kickdown function in the drive mode.
>Acceleration assistant, refer to
page 66
Selector lever positionsThe current selector lever position is
indicated by a light-emitting diode in
the center console.
R: Reverse
N: Neutral
Position for forward driving with one-
touch functions:
Sequential mode
+: manual upshifts
—: manual downshifts
D: drive mode.
The SMG is ready for operation in igni-
tion key position 2.
The gearbox is automatically
placed in neutral gear if the
driver's door is opened while the engine
is running and the driver does not actu-
ate the pedals, the shift paddles or the
selector lever.
This is accompanied by an acoustic
signal and the flashing gear indicator.
The gear display N appears in the
instrument cluster.
A driving position can only be engaged
when the driver's door is closed.
When the vehicle is unlocked, a buzzer
in the area of the transmission indicates
that the system is ready for operation.<
ShiftlockWhen the car is at a standstill, a safety
function requires you to depress the
brake pedal if you want to move the
selector lever from the neutral
position N to a driving position.Driving precautions
Use enough acceleration to pull
away speedily when moving off on
an uphill gradient. Never try to prevent
the car from rolling back on an uphill
gradient by depressing the accelerator
pedal; always apply the handbrake.
Otherwise you could overheat the SMG
gearbox.<
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67
Automatic transmission with Steptronic*In addition to the fully automatic opera-
tion, you can also shift gears manually
with Steptronic, refer to page 68.
When you move the selector lever from
the D position to the left into the M/S
range, the performance-oriented shift
programs of the automatic transmission
are engaged. Steptronic enters the
manual selection mode and executes
the desired shift whenever you tap the
selector lever in the direction indicated
by + or –. Whenever you want to use
the automatic mode again, just shift the
selector lever toward the right to posi-
tion D.
Under normal operating conditions, fuel
consumption is lowest when driving in
position D.Selector lever positionsP R N D M/S + –Starting the engineThe engine can only be started in selec-
tor lever positions P – for Park – or N –
for Neutral.
Range selectionA catch prevents inadvertent movement
of the selector lever to positions R and
P. To deactivate the catch, press the
button on the front of the selector lever
knob, see arrow.
While the vehicle is stationary and
before shifting out of Park or Neu-
tral, depress the footbrake in order to
disengage the selector lever's lock
mechanism – Shiftlock.<
Hold the footbrake down until
starting off. Otherwise the vehicle
will 'creep' when a drive position is
engaged. To prevent the vehicle from
starting off on its own, always move the
selector lever to position P and engage
the parking brake before leaving your
vehicle with the engine running.
Do not leave the vehicle unattended
with the engine running. An unattended
vehicle with a running engine repre-
sents a safety hazard.<
PParkSelect only when the vehicle is station-
ary. Transmission locks to prevent rear
wheels from turning.RReverseSelect only when the vehicle is station-
ary.NNeutralEngage this, for example, when you are
driving through a car wash. The vehicle
can roll.DDrive, automatic shift programThis position is designed for driving
under all normal operating conditions.
All forward gears are available.
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77
ClockIf you wish to have a permanent time
display, you can make this adjustment
in the radio display, refer to the Owner's
Manual for Radio.
You can adjust the clock and the time
display in the car radio as follows.
Setting
Before the clock can be set, the
time must be showing in the
instrument cluster display.<
With the ignition key in position 1 or
higher.
To set ahead: turn the right button to
the right.
To set back: turn the right button to the
left.
The adjustment speed will increase the
longer you continue to hold the right
button.
To change the display mode: press the
right button briefly.
Every time you press the button, the
clock display alternates between the
12-hour and 24-hour mode.
In ignition key position 0: the time is
displayed for a few seconds after you
press the left button, refer to Odometer
on page 74.
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78
ComputerMode selectionWith the ignition key in position 1 or
higher, you can use the onboard com-
puter button BC in the turn signal lever
to retrieve information from the com-
puter for display in the instrument clus-
ter.
Every time you tap the onboard com-
puter button BC, the display changes to
the next function in sequence.
Order of the displays:
>Clock
>Outside temperature
>Average fuel consumption
>Range
>Average speed.
When the ignition key is in position 1
and higher, the last active setting is dis-
played.
Outside temperatureYou can change the units of measure –
7/6 – for the outside temperature dis-
play by pressing the right-hand reset
button in the instrument cluster while
the temperature display is active. The
units of measure – 7/6 – in the tem-
perature display of the automatic cli-
mate control change automatically,
refer to page 94.Ice warningIf the outside temperature drops to
about 37.57/+36, then the computer
will automatically switch to a display of
the outside temperature. In addition, a
signal sounds as a warning and the dis-
play flashes for a brief period.
92
Air supply/Blower
You can select blower speeds
from 1 to 4. The heating and
ventilation become more and
more effective as the air sup-
ply settings are increased. In position 0,
the blower and the heater are switched
off. The outside air supply is blocked in
position 0.
Temperature
In order to increase the tem-
perature of the passenger
compartment, turn to the right
toward the red zone. The tem-
perature of the incoming air is kept con-
stant.
Air distribution
You can direct air to flow onto
the windows , toward your
upper body or into the
footwell . All intermediate
settings are possible. In the setting,
there is a low flow of air onto the win-
dows to keep them free of condensa-
tion.
Rear window defroster
When the rear window defroster
is activated, the indicator lamp
comes on. The rear window defroster
switches off automatically after a short
while.
You can have your vehicle pro-
grammed in such a way that the
rear window defroster switches on
automatically. This occurs within 5 min-
utes after starting the engine when out-
side temperatures are below approx.
397/+46.<
Air conditioning
The air is cooled and dehumidi-
fied and – depending on the
temperature setting – rewarmed.
Depending on the weather, the wind-
shield may fog over briefly when the
engine is started. Air conditioning helps
prevent the windows from fogging up.
Condensation forms during opera-
tion of the air conditioning system,
which then exits under the vehicle.
Traces of condensed water of this kind
are thus normal.<
Outside air/Recirculated-air mode
You can respond to unpleasant
external odors by temporarily
blocking the supply of outside air. The
system then recirculates the air cur-
rently within the vehicle.
If the windows should fog over in
the recirculated-air mode, switch
this mode off and increase the air sup-
ply as required.<
Air conditioning
96
Tips for pleasant drivingUse the automatic mode – switch on
with AUTO button 6. Select an interior
temperature that is comfortable for you.
Detailed setting options are described
for you in the following section.
You can make the settings of your
vehicle in such a manner that,
when you unlock the vehicle with the
remote control of your personal key,
your own personalized setting for the
automatic climate control is initiated.
air supply and the air distribu-
tion to the windshield and the side win-
dows, towards the upper body and to
the footwells, and in addition adapts
the temperature to external influences:
e.g. summer, winter.
The cooling function is automatically
switched on when you are using the
AUTO program.
Individual air distribution
You can cancel the AUTO pro-
gram by selecting specific dis-
tribution patterns to suit your
own individual requirements.
While the AUTO program is deacti-
vated, the automatic airflow control
remains in operation. Air flows onto
the windows , toward the upper
body , and into the footwell . You
can switch the automatic distribution of
air back on by selecting the AUTO but-
ton.Temperature
The interior temperature that
appears in the display panel is a
general figure intended for refer-
ence purposes. We recommend 727/
+226 as a comfortable setting, even if
the air conditioning is on. When you
start the vehicle, the system ensures
that the selected temperature is
achieved as quickly as possible regard-
less of the season. It then maintains this
temperature.
To select the units of measure 7/6
of the temperature display, refer to
page 78.
Air supply/Blower
By pressing the upper or lower
button, you can vary the air sup-
ply. This deactivates the auto-
matic control of the air supply, AUTO
disappears from the display panel. Nev-
ertheless, the automatic air distribution
remains unchanged. You can reactivate
the automatic air distribution mode by
selecting the AUTO button.
When the lowest blower speed is set
and you press the lower button, all of
the displays are canceled: the blower,
heating and air conditioner are
switched off. The outside air supply is
blocked. You can reactivate the system
by pressing any button for the auto-
matic climate control.To defrost windows and remove
condensation
This program quickly removes
ice and condensation from the
windshield and the side windows.
Air conditioning
The air is cooled and dehumidi-
fied and – depending on the
temperature setting – rewarmed.
Depending on the weather, the wind-
shield may fog over briefly when the
engine is started. Air conditioning helps
prevent the windows from fogging up.
The cooling function is automatically
switched on when you are using the
AUTO program.
Automatic climate control*