keyless MERCEDES-BENZ C-Class SEDAN 2015 W205 Owner's Manual

Overview ........................................1
29
Reading lamp ................................. 129 J
Jack Using ............................................. 382
Jump starting (engine) ......................349 K
KEYLESS-GO Convenience closing feature ............ 99
Deactivation ..................................... 81
Locking ............................................ 81
Unlocking ......................................... 81
Key positions
SmartKey ....................................... 157
Start/Stop button .......................... 157
Kickdown
Driving tips ................................... .167
Knee bag .............................................. 50 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 246
Display message ............................ 272
Function/informatio n.................... 219
see Active Lane Keeping Assist
Lane Tracking package ..................... 217
LATCH-type (ISOFIX) child seat
anchors ................................................ 62
License plate lamp (display mes-
sage) ................................................... 265
Light function, active Display message ............................ 266
Lights
Adaptive Highbeam Assist ............. 127
Automatic headlamp mod e............ 124
Cornering light function ................. 127
Driving abroad ............................... 124
Fogged up headlamp s.................... 128
Hazard warning lamps ................... 127
High beam flashe r.......................... 126 High-beam headlamp
s................... 126
Light switch ................................... 124
Low-beam headlamp s.................... 125
Parking lamps ................................ 126
Rear fog lamp ................................ 125
Setting exterior lighting ................. 124
Standing lamps .............................. 126
Switching the daytime running
lamps on/off (on-board com-
puter) ............................................. 247
Turn signals ................................... 126
see Interior lighting
see Replacing bulbs
Light sensor (display message) ....... 266
Loading guidelines ............................ 298
Locking see Central locking
Locking (doors)
Automatic ........................................ 88
Emergency locking ........................... 89
From inside (central locking but-
ton) .................................................. 87
Locking centrally
see Central locking
Low-beam headlamps
Changing bulb s.............................. 131
Display message ............................ 264
Setting for driving abroad (sym-
metrical) ........................................ 124
Switching on/of f........................... 125
Lumbar support
Adjusting the 4-way lumbar sup-
port ................................................ 112 M
M+S tires ............................................ 360
Maintenance see ASSYST PLUS
Malfunction message
see Display messages
Matte finish (cleaning instruc-
tions) .................................................. 332
mbrace Call priority .................................... 314
Display message ............................ 258
Downloading destinations
(COMAND) ..................................... 315 12
Index

Side marker lamp (display mes-
sage)
................................................... 266
Side windows Cleaning ......................................... 333
Convenience closing feature ............ 99
Convenience opening feature ..........98
Important safety information ........... 97
Opening/closing .............................. 98
Problem (malfunction) ................... 101
Resetting .........................................99
Sliding sunroof
Opening/closing ............................1 02
Resetting ....................................... 103
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery ....................... 84
Changing the programming ............. 82
Checking the battery ....................... 84
Convenience closing feature ............ 99
Convenience opening feature .......... 98
Display message ............................ 282
Door central locking/unlocking ....... 81
Important safety notes .................... 80
KEYLESS-GO start function .............. 82
Loss ................................................. 85
Mechanical key ................................ 83
Overview .......................................... 80
Positions (ignition lock) ................. 157
Problem (malfunction) ..................... 85
Starting the engine ........................ 159
Snow chains ...................................... 361
Sockets Center console .............................. 310
General notes ................................ 310
Rear compartment ......................... 310
Specialist workshop ............................ 26
Special seat belt retractor .................. 60
Speed, controlling see Cruise control
Speedometer
Activating/deactivating the addi-
tional speedometer ........................ 248
Digital ............................................ 237
In the Instrument cluster ................. 33 Segments ...................................... 231
Selecting the unit of measure-
ment .............................................. 248
see Instrument cluster
Standing lamps
Display message ............................ 266
Switching on/off ........................... 126
Start/Stop button
Starting the engine ........................ 159
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 159
STEER CONTROL .................................. 76
Steering Warning lamps ............................... 295
Steering (display message) .............. 281
Steering Assist and Stop&Go Pilot
(DISTRONIC PLUS) Display message ............................ 276
Steering assistant STEER CON-
TROL
see STEER CONTROL
Steering wheel
Adjusting (electrically) ................... 116
Adjusting (manually) ...................... 115
Button overview ............................... 35
Buttons (on-board computer) ......... 231
Cleaning ......................................... 336
EASY ENTRY/EXIT feature ............. 116
Important safety notes .................. 115
Paddle shifters ............................... 169
Storing settings (memory func-
tion) ............................................... 121
Steering wheel paddle shifters ........ 169
Stowage areas ................................... 298
Stowage compartments Armrest (under) ............................. 300
Center console .............................. 299
Cup holders ................................... 306
Door ............................................... 300
Eyeglasses compartment ............... 299
Glove box ....................................... 299
Important safety information ......... 298
Map pockets .................................. 300
Rear ............................................... 300
Stowage net ................................... 300
Stowage net ....................................... 300 Index
17

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops (Y page 26). Panic alarm
X
To activate: press0033button 0043for at
least one second.
An alarm sounds and the exterior lighting
flashes.
X To deactivate: press0033button 0043
again.
or
X Insert the SmartKey into the ignition lock.
or, in vehicles with KEYLESS-GO start-func-
tion or KEYLESS ‑GO
X Press the Start/Stop button.
The SmartKey must be in the vehicle. Occupant safety
Restraint system: introduction
The restraint system reduces the risk of vehi-
cle occupants coming into contact with parts of the vehicle's interior in the event of an
accident. The restraint system can also
reduce the forces to which vehicle occupants
are subjected during an accident.
The restraint system comprises:
R Seat belt system
R Air bags
R Child restraint system
R Child seat securing systems
The components of the restraint system work
in conjunction with each other. They can only deploy their protective function if, at all times,
all vehicle occupants:
R have fastened their seat belts correctly
(Y page 45)
R have adjusted their seat and head restraint
properly (Y page 109).
As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the cor-
rect driver's seat position (Y page 108).
You also have to make sure that an air bag can inflate properly if deployed (Y page 48).
An air bag supplements a correctly fastened
seat belt and is an additional safety device
providing increased protection for vehicle
occupants in appropriate accident situations.
For example, if, in the event of an accident,
the protection offered by the seat belt is suf-
ficient, the air bags are not deployed. When
an accident occurs, only the air bags that
increase protection in that particular accident
situation are deployed. However, seat belts
and air bags generally do not protect against objects penetrating the vehicle from the out-
side.
Information on restraint system operation
can be found under "Triggering of the Emer-
gency Tensioning Device and air bags"
(Y page 56). 42
Occupant safetySafety

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. STEER CONTROL
General information STEER CONTROL helps you by transmitting a
noticeable steering force to the steering
wheel in the direction required for vehicle
stabilization.
This steering assistance is provided in partic-
ular if:
R both right wheels or both left wheels are on
a wet or slippery road surface when you
brake.
R the vehicle starts to skid.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 66).
No steering support is provided from STEER
CONTROL, if:
R ESP ®
is malfunctioning.
R the lighting is faulty.
If ESP ®
is malfunctioning, you will be assisted
further by the electrical power steering. 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 start-
function or KEYLESS-GO: switch the igni-
tion 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-MERCedes (in the USA) or
1-800-387-0100 (in Canada). ATA (anti-theft alarm system)76
Protection against theftSafety

X
To arm: lock the vehicle with the SmartKey
or KEYLESS-GO.
Indicator lamp 0043flashes. 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 turn the alarm off with the SmartKey:
press the 0036or0037 button on the
SmartKey.
The alarm is switched off.
or
X Vehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: remove the Start/
Stop button from the ignition lock
(Y page 157).
X Insert the SmartKey into the ignition lock.
The alarm is switched off.
X To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The Smart-
Key must be outside the vehicle.
The alarm is switched off.
or
X Press the Start/Stop button on the dash-
board. The SmartKey must be inside the
vehicle.
The alarm is switched off.
The alarm is not switched off, even if you
close the open door that triggered it, for
example. i
If the alarm stays on for more than
30 second s,the mbrace emergency call
system automatically sends a message to
the Customer Assistance Center. This is
done either by text message or data con-
nection. The emergency call system sends
the message or data provided that:
R you have subscribed to the mbrace ser-
vice.
R the mbrace service has been activated
properly.
R the necessary mobile phone network is
available. Protection against theft
77Safety Z

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops (Y page 26). SmartKey
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. G
WARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a risk of an accident. Do not attach any heavy or large objects to the
SmartKey. Remove any bulky key rings before
inserting the SmartKey into the ignition lock.
! Keep the SmartKey away from strong
magnetic fields. Otherwise, the remote
control function could be affected.
Strong magnetic fields can occur in the
vicinity of powerful electrical installations.
Do not keep the SmartKey: R with electronic devices, e.g. a mobile
phone or another SmartKey
R with metallic objects, e.g. coins or metal
foil
R inside metallic objects, e.g. a metal case
This can affect the functionality of the
SmartKey.
Vehicles with KEYLESS-GO start function: do not keep the SmartKey on the parcel shelf or in the trunk. Otherwise, the SmartKey maynot be detected, e.g. when starting the engine
using the Start/Stop button.
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 starting the engine
R whilst driving
R when the external door handles are
touched
R during convenience closing 80
SmartKeyOpening and closing

SmartKey functions
0043
0037 Locks the vehicle
0044 0054 Opens/closes the trunk lid
0087 0036 Unlocks the vehicle
X To unlock centrally: press button0087.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle is locked again.
R protection against theft is reactivated.
X To lock centrally: press button0043.
The SmartKey centrally locks/unlocks: R the doors
R the trunk lid
R the fuel filler flap
The turn signals flash once when unlocking
and three times when locking.
You can also set an audible signal to confirm that the vehicle has been locked. The audiblesignal can be activated and deactivated via
COMAND or Audio 20 (see the separate oper-
ating instructions).
When the locator lighting is activated via
COMAND or Audio 20, it lights up when it is
dark after the vehicle is unlocked with the
remote control (see the separate operating
instructions).
X To open the trunk lid automatically
from outside the vehicle: press and hold
button 0044until the trunk lid opens.
X To open the trunk lid automatically
from outside the vehicle: if the SmartKeyis in close proximity to the vehicle: press
the
0054 button on the SmartKey.
You can release the button as soon as the
trunk lid starts to close. KEYLESS-GO
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a
SmartKey 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 0037button on the SmartKey.
The driver's door and the door at which the
handle is used, must both be closed. The
SmartKey must be outside the vehicle. When
locking or unlocking with KEYLESS-GO, the
distance between the SmartKey and the cor-
responding 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 starting the engine
R whilst driving
R when the external door handles are
touched
R during convenience closing SmartKey
81Opening and closing Z

X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face 0043or0044.
Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface 0044for an exten-
ded period.
Further information on the convenience
closing feature (Y page 99).
X To unlock the trunk lid: pull the handle on
the trunk lid.
Deactivating If you do not intend to use the vehicle for a
longer period of time, you can deactivate KEY- LESS-GO. The SmartKey will then use very lit-
tle power, thereby conserving battery power.
For the purposes of activation/deactivation,
the vehicle must not be nearby.
X To deactivate: press the0037button on
the SmartKey twice in rapid succession.
The battery check lamp of the SmartKey
lights up twice briefly and KEYLESS-GO is
deactivated.
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. KEYLESS-GO start function
Bear in mind that the engine can be started by any of the vehicle occupants if there is a
SmartKey in the vehicle. 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 0036and0037 buttons simulta-
neously for approximately six seconds until
the battery check lamp flashes twice
(Y page 84).
If the setting of the locking system is changed
within the signal range of the vehicle, press-
ing the 0037or0036 button:
R locks or
R unlocks the vehicle
The SmartKey now functions as follows:
X To unlock the driver's door: press the
0036 button once.
X To unlock centrally: press the0036but-
ton twice.
X To lock centrally: press the0037button.
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 0036and0037 buttons
simultaneously for approximately six sec- 82
SmartKeyOpening and closing

onds until the battery check lamp flashes
twice (Y
page 84). Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered. Switch off the alarm
(Y page 76).
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 X
Push release catch 0043in the direction of
the arrow and at the same time remove
mechanical key 0044from the SmartKey.
For further information about: R unlocking the driver's door (Y page 88)
R unlocking the trunk (Y page 96)
R locking the vehicle (Y page 89)
Inserting the mechanical key X
Push mechanical key 0044completely into
the SmartKey until it engages and release
catch 0043is back in its basic position. SmartKey battery
Important safety notes G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately. H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment. Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National
guidelines must be observed during disposal.
In California, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist workshop. SmartKey
83Opening and closing Z

Problems with the SmartKey
Problem
Possible causes/consequences and
0050
0050Solutions 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 84) and replace it if nec-
essary (Y page 84).
If this does not work:
X Unlock (Y page 88) or lock (Y page 89) the vehicle using the
mechanical key. There is interference from a powerful source of radio waves.
X Unlock (Y page 88) or lock (Y page 89) the vehicle using the
mechanical key. The SmartKey is faulty.
X Unlock (Y page 88) or lock (Y page 89) 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. KEYLESS-GO was deactivated.
X Reactivate KEYLESS-GO (Y page 81). The SmartKey battery is discharged or nearly discharged.
X Check the SmartKey battery (Y page 84) and replace it if nec-
essary (Y page 84).
If this does not work:
X Unlock (Y page 88) or lock (Y page 89) the vehicle using the
mechanical key. There is interference from a powerful source of radio waves.
X Unlock (Y page 88) or lock (Y page 89) 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 88) or lock (Y page 89) the vehicle using the
mechanical key.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop. SmartKey
85Opening and closing Z