2015 MERCEDES-BENZ CLS-Class key battery

Animals in the vehicle
.........................70
Anti-lock braking system
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Ashtray .............................................. .296
Assistance display (on-board com-
puter) ................................................. .235
Assistance menu (on-board com-
puter) ................................................. .235
ASSYST PLUS
Displaying a service message ....... .316
Hiding a service message .............. 316
Notes ............................................. 316
Resetting the service interval dis-
play ................................................ 316
Service message ............................ 316
Special service requirements ......... 317
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 81
Function .......................................... .81
Switching off the alarm .................... 81
ATTENTION ASSIST
Activating/deactivating ................. 236
Display message ............................ 261
Function/note s............................. 213
Audio system
see separate operating instructions
Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshop
see Qualified specialist workshop
AUTO lights
Display message ............................ 257
see Lights
Automatic car wash (care) ............... 317
Automatic engine start (ECO start/
stop function) .................................... 154
Automatic engine switch-off (ECO
start/stop function) .......................... 153
Automatic headlamp mode .............. 122
Automatic transmission
Accelerator pedal position ............. 161
Automatic drive program ............... 164
Changing gear ............................... 161
DIRECT SELECT lever ..................... 158
Display message ............................ 270 Drive program display .................... 158
Driving tips .................................... 161
Emergency running mode .............. 167
Engaging drive position .................. 160
Engaging neutral ............................ 159
Engaging park position (AMG vehi-
cles) ............................................... 158
Engaging park position automati-
cally ............................................... 159
Engaging reverse gear ................... 159
Engaging the park position ............ 159
Kickdown ....................................... 162
Manual drive progra m.................... 164
Manual drive program (AMG vehi- cles) ............................................... 165
Manual drive program (vehicles
with Sports package AMG) ............ 165
Overview ........................................ 157
Problem (malfunction) ................... 167
Program selector button ................ 162
Pulling away ................................... 152
Selector lever ................................ 157
Starting the engine ........................ 152
Steering wheel paddle shifters ...... 163
Transmission position display ........ 157
Transmission position display
(DIRECT SELECT lever) ................... 158
Transmission positions .................. 161
Automatic transmission emer-
gency mode ....................................... 167 B
BAS (Brake Assist System) ................. 71
BAS PLUS (Brake Assist System
PLUS) with Cross-Traffic Assist
Function/note s................................ 71
Important safety notes .................... 72
Battery (SmartKey)
Checking .......................................... 87
Replacing ......................................... 87
Battery (vehicle)
Charging ........................................ 333
Display message ............................ 259
Important safety notes .................. 331
Jump starting ................................. 335
Belt
see Seat belts Index
5

Storing settings (memory func-
tion) ............................................... 119
Switching seat heating on/of
f....... 111
Switching seat ventilation on/of f.. 112
Section
Trunk ............................................... 92
Securing cargo .................................. 290
Selector lever
Cleaning ......................................... 323
Sensors (cleaning instructions) ....... 321
Service menu (on-board com-
puter) .................................................. 237
Service products
Brake fluid ..................................... 390
Coolant (engine) ............................ 390
Engine oil ....................................... 389
Fuel ................................................ 387
Important safety notes .................. 387
Refrigerant (air-conditioning sys-
tem) ............................................... 392
Washer fluid ................................... 391
Setting the air distribution ............... 141
Setting the airflow ............................ 142
Settings
Factory (on-board computer) ......... 241
On-board computer ....................... 237
SETUP (on-board computer) ............. 242
Side impact air bag ............................. 52
Side marker lamp (display mes-
sage) ................................................... 257
Side windows
Cleaning ......................................... 320
Convenience closing feature ............ 98
Convenience opening feature .......... 98
Important safety information ........... 97
Opening/closing .............................. 97
Problem (malfunction) ................... 100
Resetting ......................................... 99
Sliding sunroof
Important safety notes .................. 100
Opening/closing ............................ 101
Problem (malfunction) ................... 103
Resetting ....................................... 102
SmartKey
Changing the battery ....................... 87
Changing the programming ............. 86
Checking the battery ....................... 87 Convenience closing feature ............ 99
Convenience opening feature .......... 98
Display message ............................ 272
Door central locking/unlocking ....... 84
Important safety notes .................... 84
Loss ................................................. 89
Mechanical key ................................ 86
Overview .......................................... 84
Positions (ignition lock) ................. 149
Problem (malfunction) ..................... 89
Starting the engine ........................ 152
Snow chains ...................................... 347
Sockets
Center console .............................. 298
General notes ................................ 298
Rear compartment ......................... 299
Spare wheel
Stowing .......................................... 380
Special seat belt retractor .................. 64
Specialist workshop ............................ 26
Speed, controlling
see Cruise control
Speedometer
Digital ............................................ 230
In the Instrument cluster ................. 33
Segments ...................................... 227
Selecting the unit of measure-
ment .............................................. 238
see Instrument cluster
SPORT handling mode
Activating/deactivating (AMG
vehicles) .......................................... 77
Warning lamp ................................. 278
Standing lamps
Display message ............................ 256
Switching on/of f........................... 123
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 151
Steering (display message) .............. 272
Steering Assist and Stop&Go Pilot
(DISTRONIC PLUS)
Activating/deactivating ................. 236
Display message ............................ 266
Steering wheel
Adjusting (electrically) ................... 113
Button overview ............................... 35 Index
17

X
Brake immediately to defuse the situation.
or X Take evasive action provided it is safe to do
so.
If there is an increased risk of collision, pre-
ventive passenger protection measures (PRE-
SAFE ®
) are activated.
If the risk of collision with the vehicle in front
remains and you do not brake, take evasive
action or accelerate significantly, the vehicle
may perform automatic emergency braking,
up to the point of full brake application. Auto-
matic emergency braking is not performed
until immediately prior to an imminent acci-
dent.
You can prevent the intervention of the PRE-
SAFE ®
Brake at any time by:
R depressing the accelerator pedal further.
R activating kickdown.
R releasing the brake pedal.
The braking action of PRE-SAFE ®
Brake is
ended automatically if:
R you maneuver to avoid the obstacle.
R there is no longer a risk of collision.
R there is no longer an obstacle detected in
front of your vehicle. Protection against theft
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey. X To activate with the SmartKey: remove
the SmartKey from the ignition lock.
X To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X To deactivate: switch on the ignition.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Any-
one can start the engine if a valid SmartKey
has been left inside the vehicle. i
The immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be star- ted (yet the vehicle's battery is charged),
the system is not operational. Contact an
authorized Mercedes-Benz Center or call
1-800-FOR-MERCede s (in the USA) or
1-800-387-010 0(in Canada). ATA (anti-theft alarm system)
X
To arm: lock the vehicle with the SmartKey
or KEYLESS-GO.
Indicator lamp :flashes. The alarm sys-
tem is armed after approximately
15 seconds.
X To disarm: unlock the vehicle with the
SmartKey or KEYLESS-GO.
or X Insert the SmartKey into the ignition lock.
A visual and audible alarm is triggered if the
alarm system is armed and you open:
R a door
R the vehicle with the mechanical key
R the trunk lid
R the hood
X To switch the alarm off with the Smart-
Key: press the %or& button on the
SmartKey.
The alarm is switched off.
or Protection against theft
81Safety Z

signal can be activated and deactivated using
the on-board computer (Y page 240).
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 239). KEYLESS-GO
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a KEY- LESS-GO key in the vehicle.
Locking/unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry
the SmartKey with you. You can combine the functions of KEYLESS-GO with those of a con-
ventional SmartKey. Unlock the vehicle by
using KEYLESS-GO, for instance, and lock it
using the &button on the SmartKey.
When locking or unlocking with KEYLESS-GO,
the distance between the SmartKey and the
corresponding door handle must not be
greater than 3 ft (1 m).
A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart- Key is in the vehicle. This occurs, for example:
R when the external door handles are
touched
R when starting the engine
R while the vehicle is in motion X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face :.
X Convenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
Further information on the convenience
closing feature (Y page 98). X
To unlock the trunk lid: pull the handle on
the trunk lid.
The vehicle only unlocks the trunk lid.
Deactivating and activating If you do not intend to use a key for an exten-
ded period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power,
thereby conserving battery power. For the
purposes of activation/deactivation, the
vehicle must not be nearby.
X To deactivate: press the&button on
the SmartKey twice in rapid succession.
The battery check lamp of the SmartKey
(Y page 87) flashes twice briefly and
lights up once, then KEYLESS-GO is deac-
tivated.
X To activate: press any button on the
SmartKey or insert the SmartKey into the
ignition lock.
KEYLESS-GO and all of its associated fea-
tures are available again. SmartKey
85Opening and closing Z

Changing the settings of the locking
system
You can change the settings of the locking
system. This means that only the driver's door
and the fuel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel on your own.
X To change the setting: press and hold
down the %and& buttons on the
SmartKey simultaneously for approx-
imately six seconds until the battery check
lamp flashes twice (Y page 87).
i If the setting of the locking system is
changed within the signal range of the vehi- cle, pressing the &or% button:
R locks or
R unlocks the vehicle
The SmartKey now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button.
The KEYLESS-GO function is changed as fol-
lows:
X To unlock the driver's door: touch the
inner surface of the door handle on the
driver's door.
X To unlock centrally: touch the inner sur-
face of the door handle on the front-
passenger door or the rear door.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press
and hold down the %and& buttons
simultaneously for approximately six sec-
onds until the battery check lamp flashes
twice (Y page 87). Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey, use the
mechanical key.
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 81).
There are several ways to turn off the alarm:
X To deactivate the alarm with the Smart-
Key: press the %or& button on the
SmartKey.
or
X Insert the SmartKey into the ignition lock.
or
X To deactivate the alarm with KEYLESS-
GO: press the Start/Stop button in the igni-
tion lock. The SmartKey must be in the
vehicle.
or
X Lock or unlock the vehicle using KEYLESS-
GO. The SmartKey must be outside the
vehicle.
If you unlock the vehicle using the mechanical key, the fuel filler flap will not be unlocked
automatically.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key 86
SmartKeyOpening and closing

X
Push release catch :in the direction of
the arrow and at the same time remove
mechanical key ;from the SmartKey.
For further information about: R unlocking the driver's door (Y page 92)
R unlocking the trunk (Y page 96)
R locking the vehicle (Y page 92)
Inserting the mechanical key X
Push mechanical key ;completely into
the SmartKey until it engages and release
catch :is back in its basic position. SmartKey battery
Checking the battery X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
X Change the battery (Y page 87).
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the &or% button:
R locks or
R unlocks the vehicle
i You can get a battery at any qualified spe-
cialist workshop. Replacing the battery You require a CR 2025 3 V cell battery.
X Take the mechanical key out of the Smart-
Key (Y page 86). X
Press mechanical key ;into the opening
in the SmartKey in the direction of the
arrow until battery compartment cover :
opens. Do not hold battery compartment
cover :closed while doing so.
X Remove battery compartment cover :. X
Repeatedly tap the SmartKey against your
palm until battery =falls out.
X Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
X Make sure that the surface of the battery is
free of lint, grease and other contaminants.
X Insert the front tabs of battery compart-
ment cover :into the housing and then
press to close it. SmartKey
87Opening and closing Z

Problems with the SmartKey
Problem
Possible causes/consequences and
M
MSolutions You can no longer lock
or unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X Check the SmartKey battery (Y page 87) and replace it if nec-
essary (Y page 87).
If this does not work:
X Unlock (Y page 92) or lock (Y page 92) the vehicle using the
mechanical key. The SmartKey is faulty.
X Unlock (Y page 92) or lock (Y page 92) the vehicle using the
mechanical key.
X Have the SmartKey checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. The SmartKey battery is discharged or nearly discharged.
X Check the SmartKey battery (Y page 87) and replace it if nec-
essary (Y page 87).
If this does not work:
X Unlock (Y page 92) or lock (Y page 92) the vehicle using the
mechanical key. There is interference from a powerful source of radio waves.
X Unlock (Y page 92) or lock (Y page 92) the vehicle using the
mechanical key. KEYLESS-GO is malfunctioning.
X Lock/unlock the vehicle using the remote control function of
the SmartKey.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
X Unlock (Y page 92) or lock (Y page 92) the vehicle using the
mechanical key.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop. You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. SmartKey
89Opening and closing Z

Problem
Possible causes/consequences and
M
MSolutions You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using the
SmartKey. the on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work: X Check the starter battery and charge it if necessary
(Y page 333).
or
X Jump-start the vehicle (Y page 335).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. There is interference from a powerful source of radio waves.
X Start your vehicle with the SmartKey in the ignition lock. Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle, they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start the engine.
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 or animals unattended in the vehicle. Always keep the SmartKey out of
reach of children.
You should preferably place luggage or loads in the trunk. Observe the loading guidelines
(Y page 286). Unlocking and opening doors from
the inside
You can open a door from inside the vehicle
even if it has been locked.
If the vehicle has previously been locked from
the outside, opening a door from the inside
will trigger the anti-theft alarm system.
Switch off the alarm (Y page 81).
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 69).90
DoorsOpening and closing