
On-board computer without steering
wheel buttons
X
Turn the key to position 2in the ignition
lock.
X Press the 0020button.
The 0020 symbol flashes in the display.
Or
X Press the 0004menu button on the
instrument cluster repeatedly until the
0020 symbol flashes in the display.
X Use the 000Eor000F buttons on the instrument
cluster to select the switch-on time 1 to
3 .
The switch-on time selected is displayed.
X Wait 10 seconds for the standard display to
appear.
The switch-on time is selected. The yellow
indicator lamp in the 0020button lights up.
If you do not preselect a switch-on time,
and --:-- is shown in the display, this
means that the automatic switch-on mode
is switched off. The yellow indicator lamp
in the 0020button goes out.
On-boar dcomputer with steering wheel
buttons X
Turn the key to position 2in the ignition
lock.
X Press the 0020button.
The Aux. heat submenu is shown in the
display.
If no switch-on time has been selected, the
selected switch-on time is highlighted or
Timer off is highlighted.
i You can also access the Aux. heat.submenu via the
Settings (Y
page 183)
menu. X
Use the 0011or0012 button on the
steering wheel to selec tthe desired switch-
on time.
Use the Timer off setting to deactivate
automatic switch-on.
X Press the 0010button on the steering
wheel.
The switch-on time is selected. The yellow
indicator lamp in the 0020button lights up. Setting the switch-on time
X Use the same method to select a switch-on
time as described in the "Preselecting a
switch-on time" section.
On-board computer without steering
wheel buttons
X Press the 0007reset button on the
instrument cluster.
The hour display flashes.
X Use the 000Eand 000Fbuttons on the
instrument cluster to set the hours.
X Press reset button 0007.
The minute display flashes.
X Use the 000Eand 000Fbuttons to set the
minutes.
The switch-on time is set and selected.
On-board computer with steering wheel
buttons
X Press the 0001button on the steering
wheel.
The display shows the Hours menu.
X Use the 0011and0012 buttons on the
steering wheel to set the hours.
X Press the 0001button.
The display shows the Minutes menu.
X Use the 0011and0012 buttons to set the
minutes.
X Press the 0010button.
The switch-on time is set and selected. 120
Operating the auxiliary heating systemClimate control

R
all the doors are closed.
R all the vehicle occupants are wearing
their seat belts correctly.
R the parking brake is applied.
i If you depress the brake pedal before
starting the engine, th epedal travel is short
and pedal resistance is high.
If you depress the brake pedal again after
starting the engine, pedal travel and
resistance will be back to normal again. Gearshift pattern
0016
Park position with parking lock
0012 Reverse gear
0013 Neutral
0015 Drive
X Move the selector lever to position P.
The display in the instrument cluster shows
P:
R on vehicles with steering wheel buttons
(Y page 182)
R on vehicles without steering wheel
buttons (Y page 178)
i You can also start the engine in neutral
N.
X Turn the key to position 2in the ignition
lock.
The 000D preglow indicator lamp in the
instrument cluster lights up briefly.
X Once the 000Dpreglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is
running. i
You can start the engine without preglow
when the engine is warm.
The preglow system is malfunctioning if the
000D preglow indicator lamp lights up for
approximately 1minute:
R after the ignition is switched on
R while the engine is running
At extremely low outside temperatures you
may the nno longer be able to start the
engine. Have the malfunction rectified at a
qualified specialist workshop.
i Depending on the equipment installed,
the vehicle either automatically locks
centrally after switching on the ignition or
after pulling away.T he locking knobs in the
doors drop down.
You can open the doors from the inside at
any time.
Automatic door locking can be deactivated
(Y page 69). Driving off
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do
not simultaneously accelerate.
! Only shift into reverse gear Rwhen the
vehicle is stationary. Otherwise, you could
damage the transmission.
X Depress the brake pedal and keep it
depressed.
The selector lever lock is released.
X Move the selector lever to position Dor R.
On vehicles with a reverse warning feature,
when reverse gear is engaged a warning
tone sounds to alert other road users
(Y page 136). Driving
135Driving and parking Z

Problem Possible causes/consequences and
0004 Solutions
The engine does not
start.
The starter motor
cannot be heard. The on-board voltage is too low. The battery is too weak or
discharged.
X
Jump-start the vehicle (Y page 267).
If the engine cannot be jump-started, the starter motor is faulty.
X Consult a qualified specialist workshop. The engine does not
start.
The starter motor
cannot be heard. The battery is discharged or faulty.
X
Check the battery for damage.
X Charge the battery (Y page 254).Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do
not simultaneously accelerate.
! Vehicles with automatic transmission
may roll only briefly in the neutral position
N.P rolonged rolling of the wheels, e.g.
when being towed, will result in
transmission damage. Selector lever
0016
Park position with parking lock
0012 Reverse gear
0013 Neutral
0015 Drive
The display in the instrument cluster shows
the present selector leve rposition or the
current shift range:
R on vehicles with steering wheel buttons
(Y page 182)
R on vehicles without steerin gwheel buttons
(Y page 178) 138
Automatic transmissionDriving and parking

Use the wheel chock (Y
page 147) to do so.Parking brake
G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R releasing the parking brake
R shifting the automatic transmission out of
the parking position P
R starting the engine.
They could also operate the vehicle's
equipment. There is a risk of an accident and
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. G
WARNING
If you must brake the vehicle with the parking
brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the
vehicle when the service brake is faulty. Do
not apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again. The brake lamps are not illuminated when you
brake the vehicle using the parking brake.
As a rule, you may only apply the parking
brake when the vehicle is stationary. X
To apply the parking brake: pull brake
lever 0005up as far as the last possible
detent.
The 000B warning lamp in the instrument
cluster lights up if the engine is running.
i On vehicles with a folding brake lever, you
can then press lever 0005down to the stop.
X To release the parking brake: on vehicles
with a folding brake lever, first pull brake
lever 0005up to the stop.
X Raise brake lever 0005slightly and press
release knob 0006.
X Guide brake lever 0005down to the stop.
The 000B indicator lamp in the instrument
cluster goes out.
Exceptionally, if the service brake fails, the
parking brake can be used to brake the
vehicle in an emergency.
X Emergency braking: press and hold
release button 0006and carefully apply brake
lever 0005. Switching off the engine
G
WARNING
The automatic transmission switches to
neutral position Nwhen you switch off the
engine. The vehicle may roll away. There is a
risk of an accident.
After switching off the engine, always switch
to parking position P. Prevent the parked
vehicle from rolling away by applying the
parking brake.
! If the coolant temperature is very high,
e.g. after driving on hilly roads, leave the
engine running at idle speed for about
two minutes before turning it off.
This allows the coolant temperature to
return to normal.
X Stop the vehicle.
X Shift the automatic transmission to
position P. 146
ParkingDriving and parking

LIM indicator lamp
0024shows you which
function you have selected:
R LIM indicator lamp off: cruise control is
selected.
R LIM indicator lamp lit: variable
SPEEDTRONIC is selected.
Activation conditions To activate cruise control, all of the following
activation conditions must be fulfilled:
R the parking brake must be released. The
000B indicator lamp in the instrument
cluster is off
R you are driving faster than 20 mph
(30 km/h)
R the brake pedal is depressed
i Other drive and brake systems not
described in this Operator's Manual, such
as a retarder, may affect cruise control. You
can find information on this in the separate
operating instructions provided by the
body manufacturer.
Storing and maintaining the current
speed X
Accelerate the vehicle to the desired speed
above 20 mph (30 km/h).
X Briefly push the cruise control lever up 0005
or down 0026.
X Release the accelerator pedal.
Cruise control is activated. The current
speed is stored.
Resuming the stored speed G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle
accelerates or decelerates. If you do not know
the stored speed, the vehicle could accelerate
or brake unexpectedly .There is a risk of an
accident. Pay attention to the road and traffic
conditions before calling up the stored speed.
If you do not know the stored speed, store the
desired speed again.
X Briefly pull the cruise control lever towards
you 0006.
X Release the accelerator pedal.
Cruise control is activated and resumes the
vehicle's speed to the last speed stored.
i When you pull the cruise control level
towards you for the first time after starting
the engine, cruise control adopts the
current speed.
Setting the speed It may be a moment before the vehicle starts
to accelerate or brake to the set speed. Take
this delay into account when setting the
speed.
X
Briefly push the cruise control lever
upwards 0005to increase the speed or
downwards 0026to reduce the speed.
The last speed stored is increased/
reduced in increments of 1 mph (1 km/h).
Or
X Press and hold the cruise control lever
up 0005 or down 0026until the desired speed
has been reached.
X Release the cruise control lever.
The current speed is stored.
i Cruise control is not deactivated if you
depress the accelerator pedal. If you
accelerate briefly to overtake, for example,
cruise control resumes the vehicle’s speed
to the last speed stored after you have
finished overtaking. 156
Driving systemsDriving and parking

Deactivating cruise control
There are various ways to deactivate cruise
control:
X Briefly press the cruise control lever
forwards 0025.
Or
X Apply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off
the engine.
Cruise control is deactivated automatically
when:
R you apply the brakes
R you apply the parking brake and the 000B
indicator lamp in the instrument cluster
lights up
R you are driving slower than 20 mph
(30 km/h)
R you shift the automatic transmissio nto
neutral position Nwhile the vehicle is in
motion
R ESP ®
or ASR intervenes
R there is a malfunction in the ESP ®
, ASR or
ABS system
Problems with cruise control On vehicles with steering wheel buttons, the
speed canno
tbe set when cruise control is
activated.
The display is showing a message of high
priority and cannot therefore show a change
in speed.
X Proceed as instructed by the message in
the display.
X Deactivate cruise control PARKTRONIC
Important safety notes PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate
surroundings. You are responsible for safe maneuvering, parking and pulling away. When
maneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuverin
garea.
PARKTRONIC does not account for obstacles
that are:
R beneath its detection range, e.g. persons,
animals or objects
R above its detection range, e.g. overhanging
loads, overhangs or truck loading ramps
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates the distance
between yourv ehicle and an objec tvisually
and audibly.
Your vehicle features two separate sound
emitters with different frequencies for the
warning tones. The warning ranges in front of
and behind the vehicle are indicated by
different warning tones.
PARKTRONIC is activated automatically when
you:
R tur nthe key to position 2in the ignition lock
R release the parking brake and
R move the selector lever to D,Nor R.
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). PARKTRONIC is
reactivated at speeds below 10 mph
(16 km/h).
PARKTRONIC monitors the area around your
vehicle with sensors in the front and rear
bumpers.
Range of the sensors !
Pay particular attention to obstacles
above or below the sensors when parking,
such as flower pots or trailer towbars.
PARKTRONIC does not recognize such
objects when they are in the immediate
vicinity of the vehicle. You could damage
the vehicle or objects. Driving systems
157Driving and parking Z

Problems with the rear view camera
Problem Possible causes/consequences and
0004 Solutions
After reverse gear is
selected, white lines
appear on the monitor
or the picture flickers. The rear view camera is exposed to very bright white light or
fluorescent light.
X
Check whether the rear view camera works at another location. The rear view camera is
functioning incorrectly
or not at all. R
The surrounding area is very dark.
R The outside temperature has changed rapidly or is very high.
R The camera lens is dirty or obstructed.
X Check the rear view camera and clean the camera lens if
necessary (Y page 259). Working mode
ADR (working speed governor)
General notes When activated, ADR automatically increases
the engine speed to a preset speed or a speed
you have set.
i After a cold start, the idling speed of the
engine is increased automatically. If the
preset working speed is lower than the
increased idling speed, the working speed
is only reached once the engine has
completed the warm-up phase.
It is only possible to activate ADR with the
vehicle stationary and the parking brake
applied.
The selector lever of the automatic
transmission must be in position P.Activating/deactivating ADR X
To activate: press the upper section of the
0023 switch while the engine is running.
The indicator lamp in the switch comes on.
The 0004 indicator lamp in the instrument
cluster lights up or the display shows the
following message: Operating speed governor active .
X To deactivate: press lower section of the
0023 switch while the engine is running.
The indicator lamp in the switch goes out.
ADR is automatically deactivated if:
R you release the parking brake.
R the brake pedal is depressed.
R the vehicle moves.
R the control unit detects a malfunction. Working mode
167Driving and parking Z

Useful information
............................176
Important safety notes ....................176
Instrument cluster ............................176
On-boar dcomputer (vehicles with-
out steering wheel buttons) ............178
On-boar dcomputer (vehicles with
steering wheel buttons) ...................180
Display messages ............................. 192
Indicator and warning lamps in the
instrument cluster ............................209 175On-board computer and displays