Switching daytime running lamp mode
on or off (USA only)
X
Press button = or ; to select the
Settings menu.
X Press button : or 9 to select the
Day Running Lamps function.
X Press button a. X
Press button a again if you would like
to change the current status.
Depending on the previous status, the
Daytime Running Lamps will be switched
on (Enabled) or off (Disabled).
With Daytime Running Lamps mode
Enabled selected and the exterior lamp
switch at position $ or c, the low-
beam headlamps are switched on when the
engine is running.
In low ambient light conditions the following
lamps will come on additionally:
R Parking lamps
R Tail lamps
R License plate lamps
R Side marker lamps
For more information on the daytime running
lamp mode, see “Lighting” ( Y page 276).
i Make sure the exterior lamp switch is set
to M or c when you switch off the
daytime running lamps while driving at
night.
Showing or hiding additional
speedometer You can have an additional digital
speedometer shown in the multifunction display. Depending on the setting for the
speedometer display mode (Y page 215), the
speed is shown in the unit of kilometers/hour
(setting
miles) or miles/hour (setting km).
X Press button = or ; to select the
Settings menu.
X Press button : or 9 to select the
Add. Speedometer function.
X Press button a. X
Press button a again if you would like
to change the current status.
Depending on the previous status, the
Add. Speedometer will be switched On or
Off.
Selecting speedometer display mode X
Press button = or ; to select the
Settings menu.
X Press button : or 9 to select the
Units function.
X Press button a. X
Press button a again if you would like
to change the current status.
Depending on the previous status, the
Display Unit Speed-/Odometer will be
switched to miles or km. Instrument cluster control system
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The additional speedometer (
Y page 215)
will be shown in the other unit.
Switching the radar sensors on or off If your vehicle is equipped with DISTRONIC
PLUS, BAS PLUS, or Park Assist it is equipped
with a radar sensor system which you can
switch on and off.
When traveling in Canada in a vehicle not
registered in Canada, you must switch off the
radar sensor system. Canadian law does not
permit the use of the radar sensor system for
vehicles from outside of Canada. When you
switch off the radar sensor system, the
following functions are deactivated:
R
BAS PLUS (Y page 57)
R PRE-SAFE ®
Brake (Y page 62)
R DISTRONIC PLUS (Y page 304)
R Park Assist ( Y page 324)
R Advanced Parking Guidance ( Y page 327)
R Blind Spot Assist (Y page 335)
i USA only:
This device has been approved by the FCC
as a “Vehicular Radar System”. The radar
sensor is intended for use in an automotive
radar system only. Removal, tampering, or
altering of the device will void any
warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
i Canada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause interference, and
2. this device must accept any interference received, including interference that may cause undesired
operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
X Press button = or ; to select the
Settings menu.
X Press button : or 9 to select the
Radar Sensors function.
X Press button a. X
Press button a again if you would like
to change the current status.
Depending on the previous status, the
Radar Sensors will be switched on
(Enabled) or off (Disabled).
i The selected status of the radar sensors
remains stored in memory even if the
engine is turned off and restarted.
The following message appears in the
multifunction display if the radar sensors are
switched off and you attempt to activate
DISTRONIC PLUS, Park Assist, or PRE-
SAFE ®
Brake:
Radar Sensors
(See Oper. Manual)
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This does not apply when entering voice
names or during the individualization
process.
or
X Press any COMAND button.
Setting volume level X
Activate the Voice Control System.
X Speak a command, for example “Help”.
X Press button W or X. The volume is
increased or decreased during voice
output.
or
X Set volume for voice output using the
COMAND volume thumbwheel on the lower
part of the front center console
(Y page 76).
i You can also set the text reader speed
(Y page 79).
Displays COMAND Display
In addition to the acoustic help function, a
visual help function (Y page 80) is available
on COMAND display
:.
Upon activating the Voice Control System,
the most important available commands for
the currently active mode appear on
COMAND display :.
When the Voice Control System requires
additional information from the user, a
selection list is shown on COMAND display
: in the address book and navigation
system.
Multifunction display For example, telephone numbers are shown
in the multifunction display
: while dialing
when the main Telephone menu is selected
in the instrument cluster control system. Symbols
The following symbols are found in the Voice
Control System pages:
\ This symbol stands for commands and
voice names you are speaking.
^ This symbol stands for voice output by
the Voice Control System.
_ This symbol indicates that information
is available on the COMAND display. Voice Control System navigation
Important notes
Safety notes for using the Voice Control
System G
Observe Safety notes, see page 217.
Safety notes for using the navigation
system G
Observe Safety notes, see page 83. Voice Control System navigation
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Vehicle equipment ............................
252
Locking and unlocking .....................252
Starter switch positions ................... 262
Seats .................................................. 264
Multifunction steering wheel ..........270
Mirrors ............................................... 271
Memory function .............................. 273
Lighting .............................................. 274
Wipers ................................................ 280
Power windows ................................. 282
Driving and parking .......................... 285
Automatic transmission ................... 291
Transfer case .................................... 299
Instrument cluster ............................300
Driving systems ................................ 301
Climate control system ....................338
Rear window defroster ..................... 344
Power tilt/sliding sunroof ...............345
Loading and storing ..........................347
Useful features ................................. 350 251Controls in detail
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G
Warning!
Only drive with the doors closed. Otherwise,
one or more of the doors could open while the
vehicle is in motion, putting you and/or
others at risk. G
Warning!
Make sure the trunk is closed when the engine
is running and while driving. Among other
dangers, deadly carbon monoxide (CO) gases
may enter vehicle interior resulting in
unconsciousness and death.
X Power closing assist for doors: Press the
doors gently past the initial engage position
into the lock.
X Power closing assist for trunk lid: Press
the trunk lid gently into its lock. Starter switch positions
SmartKey
G
Observe Safety notes, see page 51. Starter switch
g
For removing SmartKey
1 Power supply for some electrical
consumers, e.g. wipers
2 Ignition (power supply for all electrical
consumers) and driving position
3 Starting position
When you switch on the ignition, all lamps in
the instrument cluster come on. The high-
beam headlamp indicator lamp and turn
signal indicator lamps will only come on if activated. If a lamp in the instrument cluster
fails to come on when the ignition is switched
on, have it checked and replaced if necessary.
If a lamp in the instrument cluster remains on
after starting the engine or comes on while
driving, refer to “Lamps in instrument cluster”
(Y page 450).
X
Always remove the SmartKey from the
starter switch when the engine is not in
operation.
This will help to prevent accelerated vehicle
battery discharge or a completely
discharged vehicle battery.
If the SmartKey cannot be turned in the
starter switch, the vehicle battery may not be
sufficiently charged.
X Check the vehicle battery and charge it if
necessary ( Y page 471).
or
X Get a jump start (Y page 471).
i If the SmartKey does not belong to the
vehicle, the SmartKey can be turned in the
starter switch. However, the ignition does
not switch on and the engine does not start. KEYLESS-GO
G
Observe Safety notes, see page 51.
Vehicles equipped with the KEYLESS-GO
feature are supplied with a SmartKey with
integrated KEYLESS-GO function and a
removable KEYLESS-GO start/stop button.
The KEYLESS-GO start/stop button must be
inserted in the starter switch and the
SmartKey present in the vehicle.
Pressing the KEYLESS-GO start/stop button
without depressing the brake pedal
corresponds to the various starter switch
positions (Y page 262).
Pressing the KEYLESS-GO start/stop button
with the brake pedal firmly depressed will
start the engine (Y page 285).
The KEYLESS-GO start/stop button can be
pulled out of the starter switch easily. You can 262
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then insert the SmartKey into the starter
switch.
i
The KEYLESS-GO start/stop button does
not need to be removed from the starter
switch when you leave the vehicle.
However, always take the SmartKey with
you when you leave the vehicle. As long as
the SmartKey is in the vehicle, the vehicle’s
electrical systems can be switched on or
the engine can be started using the
KEYLESS-GO start/stop button. :
KEYLESS-GO start/stop button
; Starter switch
X Insert the KEYLESS-GO start/stop button
into the starter switch (if not inserted
already).
i Allow for 2 seconds until the system has
detected the KEYLESS-GO start/stop
button.
X Make sure the automatic transmission is in
park position P.
X Do not depress the brake pedal. KEYLESS-GO start/stop button
=
USA only
? Canada only
Position 0 Before you press the KEYLESS-GO start/stop
button, the vehicle’s on-board electronics
have status 0 (as with SmartKey removed).
Position 1
X
Press the KEYLESS-GO start/stop button
once.
This supplies power for some electrical
consumers, e.g. wipers.
i When you now open the driver’s door, the
power supply is switched off.
Ignition (or position 2) X
Press the KEYLESS-GO start/stop button
twice.
This supplies power for all electrical
consumers.
When you switch on the ignition, all lamps
in the instrument cluster come on. The
high-beam headlamp indicator lamp and
turn signal indicator lamps will only come
on if activated. If a lamp in the instrument
cluster fails to come on when the ignition
is switched on, have it checked and
replaced if necessary. If a lamp in the
instrument cluster remains on after
starting the engine or comes on while
driving, refer to “Lamps in instrument
cluster” ( Y page 450). Starter switch positions
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The seat heating switches from level
2 to level
1 (low) after approximately 10 minutes.
After approximately 20 minutes in level 1, the
seat heating switches off automatically.
X Switch on the ignition.
X Switching on: Press respective seat
heating button : repeatedly until the
desired heating level is set.
One or more red indicator lamps in
respective seat heating button : show the
selected heating level.
X Switching off: Press respective seat
heating button : repeatedly until all
indicator lamps go out.
If there is insufficient voltage the seat heating
switches off automatically.
The seat heating will switch back on again
automatically as soon as sufficient voltage is
available. Multifunction steering wheel
Safety notes
G
Warning!
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving
could cause the driver to lose control of the
vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. A child’s unsupervised access to a
vehicle could result in an accident and/or
serious personal injury.
Make sure
R you can reach the steering wheel with your
arms slightly bent at the elbows
R you can move your legs freely
R all displays (including malfunction and
indicator lamps) on the instrument cluster
are clearly visible Steering wheel adjustment
X
Adjusting steering wheel in or out: Move
stalk in direction of arrows :.
X Adjusting steering wheel up or down:
Move stalk in direction of arrows ;.
i The memory function (Y page 273) lets
you store the settings for the steering
wheel together with the settings for the
seat position and the exterior rear view
mirrors. Heated steering wheel
The steering wheel heating warms up the
leather area of the steering wheel. X
Switch on the ignition.
X Switching on: Turn switch at the tip of the
stalk in direction of arrow :.
Indicator lamp = comes on. 270
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USA only
You can only switch on the high-beam
headlamps in low ambient lighting conditions.
The high-beam flasher is available at all times.
When the engine is running, and you turn the
exterior lamp switch to position T or
L, the manual headlamp mode has
priority over the daytime running lamp mode.
The corresponding exterior lamps come on
(Y page 275).
Fog lamps
Fog lamps cannot be switched on with the
exterior lamp switch in position c.
G
Warning!
In low ambient lighting or foggy conditions,
only switch from position c to L with
the vehicle at a standstill in a safe location.
Switching from c to L will briefly
switch off the headlamps. Doing so while
driving in low ambient lighting conditions may
result in an accident.
Fog lamps will operate with the parking lamps
and/or the low-beam headlamps on. Fog
lamps should only be used in conjunction with
low-beam headlamps. Consult your State or
Province Motor Vehicle Regulations
regarding permissible lamp operation.
X Switch on the ignition.
X Turn the exterior lamp switch to position
T or L (Y page 275).
X Switching on front fog lamps: Pull out the
exterior lamp switch to first stop.
The green indicator lamp N in the
exterior lamp switch comes on.
X Switching on rear fog lamp: Pull out the
exterior lamp switch to second stop.
The rear fog lamp, the front fog lamps, the
green N and the yellow indicator lamp
R in the exterior lamp switch come on.
X Switching off front fog lamps/rear fog
lamp: Push in the exterior lamp switch to
its stop. Locator lighting and night security
illumination The locator lighting and night security
illumination are described in the COMAND
vehicle menu section under (Y page 191).
Combination switch
Turn signals
X
Press the combination switch in direction
of arrow ; or ?.
The corresponding turn signal indicator
lamp ! or # in the instrument
cluster flashes.
The combination switch resets automatically
after major steering wheel movements.
To signal minor directional changes:
X Press the combination switch only to the
point of resistance in direction of
arrow ; or ? and release.
The corresponding turn signal lamps will
flash three times. Lighting
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