Page 265 of 572

Engine
Problem Possible causes/consequences and
M Solutions
;
The yellow Check
Engine warning lamp
lights up while the
engine is running.
There may be a malfunction, for example:
R
in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system
R in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.
X Have the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you must immediately visit a qualified
specialist workshop
as soon as the yellow Check Engine warning
lamp lights up. This is due to the legal requirements in effect in
these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving. 8
The yellow reserve fuel
warning lamp lights up
while the engine is
running.
The fuel level has dropped into the reserve range.
X
Refuel at the nearest gas station. 8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the
;
Engine Check warning
lamp may light up. The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed:
close
the fuel filler
cap.
X If the fuel filler cap is closed: visit a qualified specialist
workshop. ?
The red coolant
warning lamp lights up
while the engine is
running
and
the coolant
temperature gauge is
at the start of the scale. The temperature sensor for the coolant temperature gauge is
defective.
The
coolant
temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention
to road and traffic conditions. Do not continue
driving under any circumstances.
X Secure the vehicle against rolling away ( Y page 154).
X Consult a qualified specialist workshop. Warning and indicator lamps
263
On-board computer and displays Z
Page 266 of 572

Problem Possible causes/consequences and
M Solutions?
The red coolant
warning
lamp
comes on
while the engine is
running. The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be
malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 154).
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes (Y page 498).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the coolant temperature is
under 248
‡ (120 †). Otherwise, the engine could be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. ?
The red coolant
warning
lamp
comes on
while the engine is
running. A warning tone
also sounds. The coolant temperature has exceeded 248 ‡ (120 †). The
airflow
to
the engine radiator may be blocked or the coolant level
may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not
drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 154).264
Warning and indicator lamps
On-board computer and displays
Page 267 of 572

Problem Possible causes/consequences and
M SolutionsX
Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes (Y page 498).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X At coolant temperatures under 248 ‡ (120 †), drive to the next
qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. Driving systems
Problem Possible causes/consequences and
M Solutions·
The red distance
warning lamp lights up
while the vehicle is in
motion.
A
warning tone
also sounds. You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
X
Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
Further information on DISTRONIC PLUS ( Y page 166).
Further information on PRE-SAFE ®
Brake (Y page 63). Warning and indicator lamps
265
On-board computer and displays Z
Page 268 of 572

Tires
Problem Possible causes/consequences and
M Solutions
h
USA only:
The
yellow
tire pressure
monitor warning lamp
(pressure loss/
malfunction) is lit.
Canada only:
The yellow tire pressure
monitor warning lamp
(pressure loss) is lit. The tire pressure monitor has detected a loss of pressure in at
least one of the tires.
G WARNING
With tire pressures which are too low, there is a risk of the
following hazards:
R they may burst, especially as the load and vehicle speed
increase.
R they may
wear excessively and/or unevenly, which may greatly
impair tire traction.
R the driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a risk of an accident.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay
attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away ( Y page 154).
X Observe the additional display messages in the multifunction
display.
X If there is a flat tire, inspect the tires ( Y page 509).
X Check the tire pressure (Y page 534).
X If necessary, correct the tire pressure. h
USA only:
The
yellow
tire pressure
monitor warning lamp
(pressure loss/
malfunction) flashes for
approximately one
minute and then
remains lit. The tire pressure monitor is faulty.
G WARNING
The system is possibly unable to recognize or register low tire
pressure.
There is a risk of an accident.
X Observe the additional display messages in the multifunction
display.
X Visit a qualified specialist workshop.266
Warning and indicator lamps
On-board computer and displays
Page 269 of 572
Useful information ............................
268
Operating safety ............................... 268
At a glance ......................................... 271
System settings ................................ 289
Navigation ......................................... 295
Telephone .......................................... 357
Online and Internet functions ..........385
Audio .................................................. 411
Video .................................................. 452
SIRIUS Weather ................................ 461 267COMAND
Page 270 of 572

Useful information
i These operating instructions describe all
the standard and optional equipment of
your COMAND system, as available at the
time of going to print. Country-specific
differences are possible. Please note that
your COMAND system may not be
equipped with all the features described.
This also applies to safety-related systems
and functions.
i Read the information on qualified
specialist workshops: ( Y page 31).
Operating safety
Important safety notes
G
WARNING
Making alterations to electronic components
can cause malfunctions.
Radio, satellite
radio, amplifier, DVD changer,
navigation module, phone and voice control
are networked. If one component is not
functional or if it has been incorrectly
removed/replaced, this could impair the
operation of other components.
This could seriously jeopardize the
operational safety of your vehicle.
We recommend that you always have
maintenance work on electronic components
carried out at an authorized Mercedes-Benz
Center. G
WARNING
In
order to avoid distraction which could lead
to an accident, the driver should only enter
system settings
with the vehicle at a standstill
and operate the system only when road,
weather and traffic conditions permit.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers
a distance of 44 feet (approximately 14 m) per
second. COMAND delivers information to simplify
your choice of route and guide you
comfortably and safely to your destination.
For safety reasons, we recommend that you
bring your vehicle to a standstill, paying
attention to road and traffic conditions,
before making or accepting a telephone call
or viewing navigation maps, instructions or
downloaded information on the COMAND
screen.
G
WARNING
While the navigation system provides
directional assistance,
the driver must remain
focused on safe driving behavior, especially
attention to traffic and street signs, and
should utilize the system's audio cues while
driving.
The navigation system does not supply any
information on stop signs, yield signs, traffic
regulations or traffic safety rules. Their
observance always remains in the driver's
personal responsibility. DVD maps do not
cover all areas nor all routes within an area. G
WARNING
This equipment complies with FCC radiation
exposure limits set forth for uncontrolled
equipment and meets the FCC radio
frequency (RF) Exposure Guidelines in
Supplement C to OET65.
This equipment has very low levels of RF
energy that is deemed to comply without
maximum permissive exposure evaluation
(MPE). But it is desirable that it should be
installed and operated with at least 8
inches
(20 cm)
and more between the radiator and a
person's body (excluding extremities: hands,
wrists, feet and legs.) 268
Operating safety
COMAND
Page 271 of 572

Declarations of conformity
Vehicle components which receive
and/or transmit radio waves i
USA only: The wireless devices of this
vehicle comply with Part 15 of the FCC
Rules.
Operation is subject to the following
two conditions:
1. These devices may not cause harmful
interference, and
2. These devices must accept any
interference received, including
interference that may cause undesired
operation.
Changes or modifications not expressly
approved by the party responsible for
compliance could void the user’s authority
to operate the equipment.
i Canada only: The wireless devices of this
vehicle comply with RSS-210 of Industry
Canada. Operation is subject to the
following two conditions:
1. These devices may not cause harmful
interference, and
2. These devices must accept any
interference received, including
interference that may cause undesired
operation. Correct use
Observe the
following information when using
COMAND:
R the safety notes in this manual
R traffic rules and regulations
R laws and safety standards pertaining to
motor vehicles
i Work improperly carried out on electronic
components or systems (e.g. radio, DVD
changer) and associated software could
cause them to cease functioning. Even
systems that have not been modified could
be affected because the electronic
systems are connected. Electronic malfunctions can seriously jeopardize the
operational safety of your vehicle.
i Roof antenna functionality (telephone,
satellite radio,
GPS) can be affected by the
use of roof carrier systems.
Attaching metalized retrofit film to the
windshield may affect radio reception and
have a negative impact on all other
antennas (e.g. emergency antenna) in the
vehicle interior.
i Therefore, have all work on or
modifications to electronic components
carried out at a qualified specialist
workshop. This workshop should have the
necessary specialist knowledge and tools
to carry out the work required. Mercedes-
Benz recommends that you use an
authorized Mercedes-Benz Center for this
purpose. In particular, work relevant to
safety or on safety-related systems must
be carried out at a qualified specialist
workshop.
i Protection against theft: this device is
equipped with technical provisions to
protect it against theft. Further information
on protection against theft can be obtained
from an authorized Mercedes-Benz Center. Information on copyright
General information You can find information on licenses for free
and open-source software used in COMAND
and its components here as soon as the
website goes live:
http://www.mercedes-
benz.com/opensource .
Registered trademarks Registered trademarks:
R
Bluetooth ®
is a registered trademark of
Bluetooth SIG Inc.
R DTS is a registered trademark of DTS, Inc. Operating safety
269
COMAND Z
Page 272 of 572

R
Dolby and MLP are registered trademarks
of DOLBY Laboratories.
R BabySmart™, ESP ®
and PRE-SAFE ®
are
registered trademarks of Daimler AG.
R HomeLink ®
is a registered trademark of
Prince.
R iPod ®
and iTunes ®
are registered
trademarks of Apple Inc.
R Logic7 ®
is a registered trademark of
Harman International Industries.
R Microsoft ®
and Windows media ®
are
registered trademarks of Microsoft
Corporation.
R SIRIUS is a registered trademark of Sirius
XM radio Inc.
R HD Radio is a registered trademark of
iBiquity Digital Corporation.
R Gracenote ®
is a registered trademark of
Gracenote, Inc.
R ZAGATSurvey ®
and related brands are
registered trademarks of ZagatSurvey,
LLC.
Macrovision This product incorporates copyright
protection technology that is protected by
U.S. patents and other intellectual property
rights. Use of this copyright protection
technology must be authorized by Rovi
Corporation, and is intended for home and
other limited viewing uses only unless
otherwise authorized by Rovi Corporation.
Reverse engineering or disassembly is
prohibited.
libjpeg
This software is based in part on the work of
the Independent JPEG Group.
Free Type
Portions of this software are
copyright© 2005The FreeType Project
(www.freetype.org). All rights reserved.
©1996-2000 by David Turner, Robert Wilhelm,
and Werner Lemberg.
NetFront™
This product contains NetFront Browser
software of ACCESS Co., Ltd. Copyright
©
1996-2010 ACCESS Co., Ltd. All rights
reserved.
The NetFront Browser software is based in
part on the work of the Independent JPEG
Group.
Camellia Copyright © 2006, 2007 NTT (Nippon
Telegraph and Telephone Corporation).
All rights reserved.
The conditions
and disclaimers in connection
with use of Camellia are available at http://
info.isl.ntt.co.jp/crypt/eng/index.html .
Flash ®
Lite™ This product contains Flash
®
Lite™
technology by Adobe Systems Incorporated.
This product contains Adobe ®
Flash ®
player
software under license from Adobe Systems
Incorporated, Copyright
© 1995-2010 Adobe
Macromedia Software LLC. All rights
reserved. Adobe and Flash are registered
trademarks of Adobe Systems Incorporated
in the United States and/or other countries. Your COMAND equipment
These operating instructions describe all
standard and optional equipment available
for your COMAND system at the time of
purchase. Country-specific differences are
possible. Please note that your COMAND
system may not be equipped with all the
features described. This also applies to
safety-related systems and functions.
Therefore, the equipment on your COMAND
system may differ from that in the
descriptions and illustrations. Contact an 270
Operating safety
COMAND