key battery MERCEDES-BENZ CL-Class 2011 C216 Owner's Manual

Ambient lightAdjusting (COMAND) .....................232
AMG menu (on-board computer) ..... 335
Anti-lock Braking System see ABS
Anti-Theft Alarm system
see ATA
Anti-theft system
ATA (Anti-Theft Alarm system) .........68
Ashtray ............................................... 389
Assistance menu (on-board
computer) .......................................... 339
ATA (Anti-Theft Alarm system) Activating/deactivating ...................68
Function ........................................... 68
Switching off the alarm ....................68
ATTENTION ASSIST ........................... 315
Activating/deactivating (on-
board computer) ............................ 340
Display message ............................ 363
Audio AUX jack .................................. 221
Audio CD/DVD or MP3 mode Switching to ................................... 205
Audio DVD
Stop function ................................. 207
Audio format
Setting (audio DVD mode) .............210
Audio menu (on-board computer) .... 334
AUTO lights see Light sensor
Automatic car wash .......................... 410
Automatic engine start Using the ECO start/stop
function ......................................... 271
Automatic engine stop
Using the ECO start/stop
function ......................................... 271
Automatic transmission
DIRECT SELECT lever .....................274
Display message ............................ 371
Driving tips .................................... 277
Emergency running mode ..............281
Kickdown ....................................... 277
Malfunction .................................... 281
Program selector button ................277
Pulling away ................................... 269
Starting .......................................... 269Autostore ........................................... 197
B
Back button ....................................... 109
Backrest Folding forward/back ......................96
Backrest (display message) ............. 372
Bag hook ............................................ 387
Bang & Olufsen sound system ......... 127
BAS (Brake Assist System) ................. 62
BAS PLUS (Brake Assist System
Plus*) .................................................... 62
Battery Charging ........................................ 428
Checking (SmartKey) .......................76
Display message ............................ 361
Important safety guidelines
(SmartKey) ....................................... 75
Jump-starting ................................. 429
Replacing (SmartKey) ......................76
Safety notes .................................. 426
Voltage (on-board computer) .........335
Belt
see Seat belts
Bird's-eye view .................................. 168
Blind see Roller sunblind
Bluetooth ®
Activating/deactivating .................133
Authorizing a device ......................134
Connecting devices .......................133
Devices .......................................... 133
External authorization ............134, 181
General information .......................132
Interface ........................................ 179
Revoking authorization ..................135
Settings ......................................... 132
Telephony .............................. 178, 179
Bluetooth ®
interface
Telephony ...................................... 178
Bluetooth ®
interface telephony
Conditions ..................................... 179
Bluetooth ®
telephone list ................. 180
Brake fluid Notes ............................................. 472
Brake fluid level ................................ 409
Brake lamp (display message) ......... 356
Index5

Releasing ......................................... 54
Safety guidelines ............................. 41
Special seat belt retractor ...............58
Warning lamp ................................. 376
Warning lamp (function) ................... 54
Seat heating
Indicator lamp (Malfunction) ............98
Seats
Adjusting (electrically) .....................94
Adjusting lumbar support ................97
Adjusting the head restraint ............95
Cleaning the cover .........................416
Correct driver's seat position ........... 92
Important safety notes ....................93
Multicontour seat ............................ 97
Storing settings (memory
function) ........................................ 102
Switching seat heating on/off .........97
Switching the seat ventilation on/
off .................................................... 98
Seat ventilation
Indicator lamp (Malfunction) ............98
Sensors (cleaning instructions) ....... 414
Service indicator see Service interval display
Service interval display .................... 409
Displaying a service message (on-
board computer) ............................ 410
Service menu (on-board computer) . 340
Service products Brake fluid ..................................... 472
Capacities ...................................... 469
Coolant (engine) ............................ 473
Engine oil ....................................... 471
Fuel ................................................ 470
Important safety notes ..................468
Notes ............................................. 468
Refrigerant (air-conditioning
system) .......................................... 472
Washer fluid ................................... 473
Settings
On-board computer .......................341
Setting the air distribution
COMAND ....................................... 235
Shift ranges ....................................... 278
Showing the distance display (on-
board computer) ............................... 339
Side impact air bag ............................. 45Side marker lamp (display
message) ............................................ 358
Side windows Convenience closing feature ............86
Convenience opening feature ..........86
Important safety information ...........85
Opening/closing .............................. 86
Resetting ......................................... 87
Troubleshooting ............................... 88
Skipping back
CD/DVD mode .............................. 209
Skipping forwards
CD/DVD mode .............................. 209
Sliding sunroof
Important safety information ...........88
Opening/closing .............................. 89
Resetting ......................................... 90
Troubleshooting ............................... 90
SmartKey
Changing the battery .......................76
Changing the programming .............75
Checking the battery .......................76
Convenience closing feature ............86
Convenience opening feature ..........86
Display message ............................ 373
Important safety notes ....................72
Malfunction ...................................... 77
Starting the engine ........................269
Snow chains ...................................... 440
Socket ................................................ 390
Dashboard ..................................... 391
Trunk ............................................. 391
SOS
see mbrace
Sound
Switching on/off ........................... 124
Sound Mode ....................................... 127
Sound settings .................................. 125
Spare wheel Notes/data .................................... 464
Storage location ............................ 420
see Emergency spare wheel Index17

Anti-theft systems
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct key.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
key that is left inside the vehicle.
XTo activate with the SmartKey: remove
the SmartKey from the ignition lock.
XTo activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
XTo deactivate: switch on the ignition.
iThe immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be
started when the starter battery is fully
charged, the immobilizer may be faulty.
Contact an authorized Mercedes-Benz
Center or call 1-800-FOR-MERCedes (in
USA) or 1-800-387-0100 (in Canada).
ATA (Anti-Theft Alarm system)
A visual and audible alarm is triggered if the
alarm system is armed and you open:
Ra door
Rthe vehicle with the mechanical key
Rthe trunk lid
Rthe hood
The alarm is not switched off, even if you
close the open door that has triggered it, for
example.
iIf the alarm stays on for more than 30
seconds, the emergency call system
mbrace (USA only) or TELEAID (Canada
only) initiates a call to the Customer
Assistance Center automatically. The
emergency call system initiates the call
provided that:
Ryou have subscribed to the mbrace/
TELEAID service.
Rthe mbrace/TELEAID service has been
activated properly.
Rthe required mobile phone, power supply
and GPS are available.
XTo arm: lock the vehicle with the SmartKey
or KEYLESS-GO.
Indicator lamp : flashes. The alarm
system is armed after approximately 30
seconds.
XTo deactivate: unlock the vehicle using the
SmartKey or KEYLESS-GO.
XTo stop the alarm using the SmartKey:
insert the SmartKey into the ignition lock.
The alarm is switched off.
or
XPress the % or & button on the
SmartKey.
The alarm is switched off.
68Anti-theft systemsSafety

Vehicle equipment
i This manual describes all the standard
and optional equipment of your vehicle
which was available at the time of
purchase. Country-specific differences are
possible. Bear in mind that your vehicle
may not feature all functions described
here. This also refers to safety-related
systems and functions.
SmartKey
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 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
General information
If you cannot open or lock the vehicle with the
SmartKey, either the battery in the SmartKey
is empty, the SmartKey is faulty, or the starter
battery is discharged.
XCheck the battery in the SmartKey and
replace it if necessary ( Y page 76).XUnlock the driver's door with the
mechanical key ( Y page 80).XLock the vehicle ( Y page 80).XHave the starter battery and battery
contacts checked by an authorized
Mercedes-Benz Center.
If the SmartKey is faulty, contact Roadside
Assistance or an authorized Mercedes-Benz
Center.
SmartKey functions
General notes
i USA only:
This device complies with Part 15 of the
FCC regulations. Operation is subject to
the following conditions:
1. This device must not cause any harmful
interference, and
2. This device must be able to
accommodate interference that is
received, including interference which
could cause unwanted functions.
72SmartKeyOpening and closing

X To unlock the vehicle: pull the door
handle.XTo lock the vehicle: touch sensor
surface :.
If you pull on the handle of the trunk lid, only
the trunk of the vehicle is unlocked.
Changing the settings of the locking
system
You can change the setting of the locking
system in such a way that only the driver's
door and the fuel filler flap are unlocked. This
is useful if you frequently travel on your own.
XTo change the setting: press and hold
down the % and & buttons
simultaneously for approximately six
seconds until the battery check lamp
( Y page 76) flashes twice.
The SmartKey now functions as follows:
XTo unlock the driver's door: press the
% button once.XTo unlock centrally: press the %
button twice.XTo lock centrally: press the & button.
The KEYLESS-GO function is changed as
follows:
XTo unlock the driver's door : pull the door
handle on the driver's door.XTo unlock centrally: pull the front-
passenger door handle.XTo lock centrally: touch sensor
surface : on one of the door handles.
Restoring the factory settings
XPress the % and & buttons
simultaneously for approximately six
seconds until the battery check lamp
flashes twice.Mechanical key
General notes
If you use the mechanical key to unlock and
open the driver's door or the trunk lid, the
anti-theft alarm system will be triggered
( Y page 68).
There are several ways to turn off the alarm:
XPress the % or & button on the
SmartKey.
or
XInsert the SmartKey into the ignition lock.
or
XPress the Start/Stop button in the ignition
lock. The SmartKey must be in the vehicle.
or
XLock or unlock the vehicle using KEYLESS-
GO. The SmartKey must be outside the
vehicle.
Removing the mechanical key
XPush release catch : in the direction of
the arrow and at the same time, remove
mechanical key ; from the SmartKey.
SmartKey battery
Important safety notes
It is advisable to have batteries replaced at a
qualified specialist workshop, e.g. at an
authorized Mercedes-Benz Center.
SmartKey75Opening and closingZ

GWarning
Batteries contain toxic and caustic
substances. For this reason, keep batteries
out of the reach of children.
If a battery has been swallowed, seek medical
help immediately.
GWarning
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Observe
government disposal guidelines. California
residents, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm .
Checking the battery
XPress the & or % button.
The SmartKey battery is working properly if
battery charge indicator lamp : lights up
briefly.
If battery charge indicator lamp : does not
light up briefly during the test, the SmartKey
battery is discharged.
XReplace the SmartKey battery
( Y page 76).
i
You can obtain a SmartKey battery at any
authorized Mercedes-Benz Center.
i If the SmartKey battery is checked within
signal range of the vehicle, pressing the
& or % button results in the vehicle
being locked or unlocked respectively.
Changing the battery
You require a CR 2025 3 V cell battery.
XTake the mechanical key out of the
SmartKey ( Y page 75).XPress mechanical key ; into the opening
in the SmartKey in the direction of the
arrow until battery tray cover : opens. Do
not hold the cover closed while doing so.XRemove the cover of the battery tray.XRepeatedly tap the SmartKey against your
palm until battery = falls out.XInsert the new battery with the positive
pole facing upwards. Use a lint-free cloth to
do so.XInsert the front tabs of the battery tray's
cover first and then press to close it.XCheck the function of all SmartKey buttons
on the vehicle.76SmartKeyOpening and closing

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 closingZ

ProblemPossible causes/consequences and M SolutionsThe engine cannot be
started using the
SmartKey.The on-board voltage is too low.XRemove the SmartKey and reinsert it into the ignition lock.XStart the engine within 30 seconds of inserting the SmartKey
into the ignition lock.XRepeat if necessary.
If the engine does not start after several attempts:
XCheck the starter battery and charge it if necessary
( Y page 426).
or
XJump-start the vehicle ( Y page 429).
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 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

Unlocking and opening the doors
from the inside
You can open a door from inside the vehicle
even if it has been locked.
Open the door only when the traffic
conditions permit.
If the vehicle has been opened with the
SmartKey or KEYLESS-GO key, opening from
inside triggers the anti-theft alarm system.
Switch off the alarm (Y page 68).
XPull door handle ;.
If the door is locked, locking knob : pops
up. The door is unlocked and can be
opened.
iWhen a door is opened, the side window
on that side opens slightly. When the door
is closed, the side window closes again.
! The side windows will not open/close if
the battery is discharged or if the side
windows have iced up. It will then not be
possible to close the door. Do not attempt
to force the door closed. You could
otherwise damage the door or the side
window.
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. This feature may be useful if,
for example, you wish to unlock the front-
passenger door from the inside or lock the
vehicle before you pull away.
The central locking/unlocking button does
not lock or unlock the fuel filler flap.
XTo lock: press button ;.
The vehicle locks itself when the front-
passenger door is closed.
XTo unlock: press button :.
You can open a door from inside the vehicle
even if it has been locked. Open the door only
when the traffic conditions permit.
If the vehicle has been locked with the locking
button for the central locking function:
Rand the SmartKey has been reset to the
factory settings, the complete vehicle is
unlocked when a door is opened from the
inside
Rand the SmartKey has been set to an
individual setting, only the door that is
opened from the inside is unlocked
If the vehicle has been locked centrally with
the SmartKey or with KEYLESS-GO, it is not
unlocked if you use the unlocking button for
the central locking system.
Automatic locking
The vehicle locks automatically when the
ignition is switched on and the wheels of the
vehicle are moving at a speed above 9 mph
(15 km/h). Therefore, there is a risk of being
locked out when the vehicle is being pushed,
towed or tested on a dynamometer.
You can switch off the automatic locking
function via COMAND (Y page 233).
Doors79Opening and closingZ

XInsert the mechanical key into the trunk lid
lock as far as the stop.
XTurn the mechanical key clockwise from
position 1 to position 2.
XRemove the mechanical key.
Unlocking the trunk (mechanical key)
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
If the trunk can no longer be unlocked with
the SmartKey or KEYLESS-GO:
XTake the mechanical key out of the
SmartKey (Y page 75).
XInsert the mechanical key into trunk lid
lock : as far as possible.
XTurn the mechanical key counter-clockwise
as far as possible.
The trunk is unlocked.
XTurn the mechanical key back and remove
it.Trunk emergency release
You can open the trunk lid from inside the
vehicle with the emergency release button.
XBriefly press emergency release
button :.
The trunk lid unlocks and opens.
The trunk lid can be unlocked and opened
with the trunk lid emergency release when
the vehicle is stationary or while driving.
Trunk lid emergency release light:
RThe button flashes for 30 minutes after the
trunk lid is opened.
RThe button flashes for 60 minutes after the
trunk lid is closed.
The trunk lid emergency release does not
open the trunk lid if the battery is
disconnected or discharged.
84TrunkOpening and closing