
Symbols
Registered trademarks:
R AdBlue ®
 is a registered trademark of the
Association of German Automobile
Manufacturers (VDA).
R BabySmart™ is a registered trademark of
the Siemens Automotive Corp.
R Bluetooth ®
 is a registered trademark of the
Bluetooth SIG Inc.
R ESP ®
 and PRE-SAFE ®
 are registered
trademarks of Daimler AG.
R HomeLink ®
 is a registered trademark of
Prince, a Johnson Controls Company.
R SIRIUS and related brands are registered
trademarks of SIRIUS XM Radio Inc.
In this Operator's Manual you will find the
following symbols:GWarning
Warning notices draw your attention to
hazards that endanger your health or life, or
the health or life of others.
!  Warning notices draw your attention to
hazards that could cause damage to your
vehicle.
i Practical tips or other information that
could be helpful to you.
XThis symbol indicates instructions
that you must follow.XA number of these symbols
appearing in succession indicates
instructions with several steps.Y  pageThis symbol tells you where to look
for further information on a topic.YYThis symbol marks a warning or
procedure which is continued on
the next page.DisplayText in the multifunction display/
COMAND display.BA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 2 

Power windowssee Side windows                                     
Pre-emptive occupant safety
system
see PRE-SAFE ®
 system                             
PRE-SAFE ®
 system
Display message  ............................ 231
Operation  ......................................... 51
Product information  ............................ 19
Pulling away Automatic transmission  .................149
R
Radar sensor system (on-board
computer)  .......................................... 224
Radiator cover  ................................... 295
Radio Changing a station (on-board
computer)  ...................................... 219
see separate operating instructions         
Radio-controlled equipment
Assembly  ....................................... 292
Range (on-board computer)  ............. 227
Rear bench seat Folding forwards/back  ..................267
Rear compartment
Activating/deactivating climate
control  ........................................... 137
Setting the air vents  ..............143, 144
Setting the temperature  ................139
Rear-compartment seat
see Rear seat                                            
Rear fog lamp (display message)  ..... 239
Rear seat Adjusting  ....................................... 100
Rear view camera
Function/notes  ............................. 198
Rear view camera (cleaning
instructions)  ...................................... 303
Rear-view mirror Anti-glare (manual)  ........................108
Dipping (automatic)  .......................109
Rear window heating
Malfunction .................................... 141
Switching on/off  ........................... 141
Rear window wiper  ........................... 126
Replacing the wiper blade .............. 127
Refueling  ............................................ 159
Remote control Programming (garage door
opener)  .......................................... 289
Reporting
Malfunctions relevant to safety ........ 23
Reserve fuel
Display message  ............................ 243
Warning lamp ................................. 259
Reset button  ........................................ 28
Residual heat Switching on/off  ........................... 142
Restraint systems
see SRS                                                     
Reversing lamp (display message)  .. 239
Roadside Assistance (breakdown)  .... 20
Roller sunblind Rear panorama roof  .......................279
Roof carrier  ........................................ 273
Roof lining and carpets (Cleaning
guidelines)  ......................................... 305
Route see Route guidance (on-board
computer)                                                 
Route guidance (on-board
computer)  .......................................... 220
S
Safety Children in the vehicle  .....................59
Child restraint systems  ....................59
Occupant Classification System
(OCS)  ............................................... 42
Overview of occupant safety
systems  ........................................... 36
Safety systems
see Driving safety systems                       
Seat
Folding down/up (third row of
seats)  ............................................. 100
Seat belts
Adjusting the driver's and front-
passenger seat belt  .........................56
Adjusting the height ......................... 56
Belt force limiters  ............................ 57
Cleaning ......................................... 305
Correct usage  .................................. 54
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Warning lamp ................................. 258
Warning lamp (function) ................... 36
Standard display (on-board
computer)  .......................................... 218
Starting the engine Important safety instructions ......... 148
Station
see Radio                                                  
Status line (on-board computer)
Multifunction display  .....................216
Selecting the display ...................... 222
Steering (display message)  .............. 251
Steering wheel Adjusting (electrically)  ...................106
Adjusting (manually)  ......................106
Buttons (on-board computer) ......... 215
Cleaning ......................................... 304
Important safety instructions ......... 105
Memory function (storing
settings) ......................................... 106
Steering wheel heating  ..................106
Storing settings (memory
function)  ........................................ 110
Steering wheel heating
Indicator lamp (Malfunction)  ..........107
Steering wheel paddle shifters  ........ 155
Stowage compartments Armrest (under)  ............................. 265
Glove box  ....................................... 265
Stowage space
Center console  .............................. 265
Center console (rear)  .....................266
Cup holders  ................................... 277
Important safety information  .........264
Submenu (on-board computer)
Convenience  .................................. 225
Instrument cluster  .........................221
Lighting  .......................................... 223
Time/Date  ..................................... 222
Vehicle  ........................................... 224
Summer opening
see Convenience opening feature            
Sun visor  ............................................ 278
Supplemental Restraint System see SRS                                                     
Surround lighting (on-board
computer)  .......................................... 223SUV
(Sport Utility Vehicle)  .......................21
Switching off the alarm (ATA)  ............ 69
T
Tachometer  ........................................ 214
Tailgate Display message  ............................ 251
Important safety guidelines  .............80
Limiting the opening angle  ...............84
Taillight
see Tail lamps                                           
Tank contents
Gauge  .............................................. 28
Technical data  ................................... 362
GL 350 BlueTEC  ............................. 370
GL 450  ........................................... 371
GL 550  ........................................... 371
Tires/wheels  ................................. 357
TELEAID
Call priority  .................................... 287
Display message  ............................ 231
Downloading destinations
(COMAND)  ..................................... 287
Emergency call  .............................. 284
Important safety notes  ..................283
Locating a stolen vehicle  ...............288
MB info call button  ........................286
Roadside Assistance button  ..........285
Self-test  ......................................... 283
System  .......................................... 283
Vehicle remote unlocking  ..............287
Telephone
Accepting a call  ............................. 228
Display message  ............................ 252
Menu (on-board computer)  ............227
Number from the phone book ........ 228
Redialing  ........................................ 228
Rejecting/ending a call  .................228
Telephone compartment  .................. 265
Telescopic rod (EASY-PACK load-
securing kit)  ....................................... 272
Temperature Coolant (on-board computer) ......... 218
Displaying the outside
temperature  ................................... 218
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Important information about using
KEYLESS-GO
R You can use the KEYLESS-GO key as a
conventional SmartKey.
R You can combine KEYLESS-GO functions
with those of a conventional SmartKey, e.g.
you can open the vehicle with KEYLESS-GO
and close it with the  & button.
R Always carry your KEYLESS-GO key on your
person.
R Never store the KEYLESS-GO key together
with:
- electronic devices, such as a mobile
phone or other SmartKey
- metal objects, such as coins or metal foil
Doing so may impair the function of
KEYLESS-GO.
R To open or close the vehicle, the KEYLESS-
GO key should not be more than 3 ft (1 m)
from the door or tailgate.
R If the vehicle is parked for more than
72 hours, the KEYLESS-GO function is
deactivated. Pull an outer door handle and
switch on the ignition to reactivate the
KEYLESS-GO function.
R If the KEYLESS-GO key is removed from the
vehicle, the system may not be able to
recognize the SmartKey anymore. The
vehicle can then no longer be locked or
started with KEYLESS-GO.
R If the KEYLESS-GO key has been removed
from the vehicle, e.g. when another vehicle
occupant with a KEYLESS-GO key leaves
the vehicle:
- when the Start/Stop button is pressed,
or when trying to lock the vehicle using
the locking button on the outside door
handle, the  Key Not Detected  message
appears in the multifunction display.
- when the engine is running, the red  Key 
Not Detected  message appears in the
multifunction display as you pull away.
Look for the KEYLESS-GO key and place
it somewhere else in the vehicle. Place
the KEYLESS-GO key on the front-
passenger seat, for example, or in your
shirt pocket.
R If you have switched on the engine with the
Start/Stop button, you can switch it off
again by:
- pressing the Start/Stop button
- inserting the KEYLESS-GO key into the
ignition lock while the vehicle is at a
standstill and the automatic
transmission is in park position  P.
R You may inadvertently unlock the vehicle if
the KEYLESS-GO key is less than 3 ft (1 m)
from the vehicle and:
- an exterior door handle is hit by a jet of
water, or
- you clean an exterior door handle
R Please note that any vehicle occupant can
start the engine when there is a KEYLESS-
GO key in the vehicle.
Scenario 1:  There is a KEYLESS-GO key in
the vehicle and a second one outside the
vehicle. If you leave the KEYLESS-GO key
in the vehicle when you leave and lock the
vehicle, no message appears in the
multifunction display.
Scenario 2:  There is a KEYLESS-GO key in
the vehicle, but none outside the vehicle. If
you get out of the vehicle and attempt to
lock it, the  Key Detected In Vehicle
message appears in the multifunction
display. The vehicle is not then locked.
When starting the engine and whilst driving,
KEYLESS-GO also checks whether a valid
SmartKey is in the vehicle by periodically
establishing radio contact.74SmartKeyOpening and closing
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Problems with the SmartKeyProblemPossible causes/consequences and M SolutionsYou cannot lock or
unlock the vehicle
using the SmartKey.The SmartKey battery is discharged or nearly discharged.XPoint the tip of the SmartKey at the driver's door handle from a
distance of approximately 1.5 ft (50 cm) and try to unlock or
lock the vehicle again.
If this does not work:
XCheck the SmartKey battery and replace it if necessary
( Y  page 76).XLock ( Y page 80) or unlock ( Y page 80) the vehicle using
the mechanical key.The SmartKey is faulty.XLock ( Y page 80) or unlock ( Y page 80) the vehicle using
the mechanical key.XHave the SmartKey checked at a qualified specialist workshop.You can no longer lock
or unlock the vehicle
using KEYLESS-GO.KEYLESS-GO is in standby mode because the vehicle has not been
unlocked for an extended period.XPull the door handle twice and then insert the SmartKey into the
ignition lock.There is a malfunction with KEYLESS-GO.XLock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the  %/&  button.XHave the SmartKey checked at a qualified specialist workshop.There is interference from a powerful source of radio waves.XLock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the  %/&  button.You have lost the
SmartKey.XHave the SmartKey canceled at an authorized Mercedes-Benz
Center.XReport the loss immediately to the vehicle insurers.XIf necessary, have the locks changed as well.You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.XIf necessary, have the locks changed as well.SmartKey77Opening and closingBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 77Z 

ProblemPossible causes/consequences and M SolutionsThe engine cannot be
started using the
SmartKey.The on-board voltage is too low.XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
( Y  page 322).
or
XJump-start the vehicle ( Y page 325).
or
XConsult a qualified specialist workshop.The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.A door is open. Therefore, the SmartKey cannot be detected as
easily.XClose the door and try to start the vehicle again.There is interference from a powerful source of radio waves.XStart your vehicle with the SmartKey in the ignition lock.Doors
Important safety notes
GWarning!
When leaving the vehicle, always remove the
SmartKey from the starter switch. Always
take the SmartKey with you and lock the
vehicle. Do not leave children unattended in
the vehicle, even if they are secured in a child
restraint system, 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. The children
could
R injure themselves on parts of the vehicle
R be seriously or fatally injured through
excessive exposure to extreme heat or cold
R injure themselves or cause an accident with
vehicle equipment that can be operated
even if the SmartKey is removed from the
starter switch or removed from the vehicle,
such as seat adjustment, steering wheel
adjustment, or the memory function
If children open a door, they could injure other
persons or get out of the vehicle and injure
themselves or be injured by following traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and the child could be burned by these
parts.GWarning!
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Unsecured or improperly positioned cargo
increases a child’s risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident
78DoorsOpening and closing
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Problems with the engineProblemPossible causes/consequences and M SolutionsThe engine does not
start. The starter motor
can be heard.R There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.XTurn the SmartKey back to position  0  in the ignition lock before
the next attempt to start with the SmartKey.XBefore the next starting attempt with KEYLESS-GO: shut all open
vehicle doors so that the signals from the SmartKey may be
better received.
or
XPull the Start/Stop button out of the ignition.XUse the SmartKey to start the engine,  (Y  page  148) as external
radio signals cause KEYLESS-GO to malfunction. Avoid
excessively long and frequent attempts to start the engine as
these will drain the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the starter battery is too
weak or discharged.XJump-start the vehicle ( Y page 325).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.The starter motor was exposed to a thermal load that was too high.XAllow the starter motor to cool down for approximately two
minutes.XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.Driving151Driving and parkingBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 151Z 

Problems with PARKTRONICProblemPossible causes/consequences and M SolutionsOnly the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is
deactivated after
approximately
20 seconds and the
indicator lamp in the
PARKTRONIC button
lights up.PARKTRONIC has malfunctioned and has switched off.XIf problems persist, have PARKTRONIC checked at a qualified
specialist workshop.Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is
deactivated after
approximately 20
seconds.The PARKTRONIC sensors are dirty or there is interference.XClean the PARKTRONIC sensors ( Y page 303).XSwitch the ignition back on.The problem may be caused by an external source of radio or
ultrasound waves.XSee if PARKTRONIC functions in a different location.Rear view camera
Important safety guidelines
The rear view camera is an optical parking aid.
It shows the area behind your vehicle in the
COMAND APS display.
GWarning!
Make sure no persons or animals are in or
near the area in which you are parking/
maneuvering. Otherwise, they could be
injured.
The rear view camera is located in the handle
strip of the tailgate.
:Rear view camera
View through the camera
The area behind the vehicle is displayed as a
mirror image, as in the rear-view mirror.
198Driving systemsDriving and parking
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