2015 MERCEDES-BENZ C-Class SEDAN child lock

Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 258
Notes ............................................. 401
Brake force distribution, elec-
tronic
see EBD (electronic brake force
distribution)
Brake lamps
Display message ............................ 265
Brakes
ABS .................................................. 66
Adaptive Brake Assist ...................... 70
BAS .................................................. 67
BAS PLUS with Cross-Traffic
Assist ............................................... 67
Brake fluid (notes) ......................... 401
Display message ............................ 251
EBD .................................................. 73
Hill start assist ............................... 160
HOLD function ............................... 196
Important safety notes .................. 180
Maintenance .................................. 181
Parking brake ................................ 176
Riding tips ...................................... 180
Warning lamp ................................. 285
Breakdown
see Flat tire
see Towing away
Brightness control (instrument
cluster lighting) ................................... 32
Bulbs see Replacing bulbs
Buttons on the steering wheel ......... 231C
California Important notice for retail cus-
tomers and lessees .......................... 24
Calling up a malfunction
see Display messages
Camera
see 360° camera
Car
see Vehicle Care
360° camera ................................. 335
AIRPANEL ...................................... 334
Carpets .......................................... 337
Car wash ........................................ 330
Display ........................................... 336
Exhaust pipe .................................. 335
Exterior lights ................................ 333
Gear or selector lever .................... 336
Interior ........................................... 336
Matte finish ................................... 332
Note s............................................. 329
Paint .............................................. 332
Plastic trim .................................... 336
Power washer ................................ 331
Rear view camera .......................... 334
Roof lining ...................................... 337
Seat belt ........................................ 337
Seat cove r..................................... 337
Sensors ......................................... 334
Steering wheel ............................... 336
Trim pieces .................................... 336
Washing by hand ........................... 331
Wheels ........................................... 333
Windows ........................................ 333
Wiper blades .................................. 333
Wooden trim .................................. 336
Cargo tie down rings ......................... 303
Car key see SmartKey
CD player/CD changer (on-board
computer) .......................................... 241
Center console Lower section .................................. 37
Upper section .................................. 36
Central locking
Locking/unlocking (SmartKey )........ 81
Changing bulbs
High-beam headlamp s................... 132
Low-beam headlamp s.................... 131
Reversing lamps ............................ 132
Turn signals (front) ......................... 132
Turn signals (rear) .......................... 132
Child-proof locks
Important safety notes .................... 64
Rear doors ....................................... 65 6
Index

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

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

Depending on the person in the front-
passenger seat, the front-passenger front air
bag must either be disabled or enabled; see
the following points. You must make sure of
this both before and during a journey.
R Children in a child restraint system:
whether the front-passenger front air bag is
enabled or deactivated depends on the
installed child restraint system, and the age
and size of the child. Therefore, be sure to
observe the notes on the "Occupant clas-
sification system (OCS)" (Y page 51) and
on "Children in the vehicle" (Y page 59).
There you will also find instructions on
backwards- and forwards-facing child
restraint systems on the front-passenger
seat.
R All other persons: depending on the clas-
sification of the person in the front-
passenger seat, the front-passenger front
air bag is enabled or deactivated
(Y page 51). Be sure to observe the notes
on "Seat belts“ (Y page 44) and "Air bags"
(Y page 48). There you can also find infor-
mation on the correct seat position. Seat belts
Introduction A correctly fastened seat belt is the most
effective means of restraining the movement
of vehicle occupants in the event of an acci-
dent or overturn. This reduces the risk of
vehicle occupants coming into contact with
parts of the vehicle interior or being thrown
from the vehicle. Furthermore, the seat belt
helps to keep the vehicle occupants in the
best position in relation to the air bag.
The seat belt system consists of:
R Seat belts
R Emergency Tensioning Devices for the
front seat belts and the outer seat belts in
the rear compartment
R Belt force limiters for the front seat belts
and the outer seat belts in the rear If the seat belt is pulled quickly or suddenly
from the belt sash guide, the inertia reel
locks. The belt strap cannot be pulled out fur-
ther.
Emergency Tensioning Devices tighten the
seat belts in an accident, pulling them close
against the occupant's body. They do not,
however, pull vehicle occupants back
towards the backrest.
Emergency Tensioning Devices do not cor-
rect an incorrect seat position or incorrectly
worn seat belts.
When activated, the belt force limiters reduce
the force exerted by the seat belt on the vehi-
cle occupants.
The belt force limiters for the front seats are
synchronized with the front air bags, which
absorb part of the deceleration force. This
makes it possible to reduce the forces to
which vehicle occupants are subjected during an accident.
! If the front-passenger seat is unoccupied,
do not insert the belt tongue into the buckle of the front-passenger seat. This may oth-
erwise lead to the triggering of the Emer-
gency Tensioning Device in the event of anaccident, which will then need to be
replaced.
Important safety notes The use of seat belts and child restraint sys-
tems is required by law in:
R all 50 states
R the U.S. territories
R the District of Columbia
R all Canadian provinces
Even where this is not required by law, all
vehicle occupants should correctly fasten
their seat belts before starting the journey. G
WARNING
If the seat belt is incorrectly fastened, it can-
not protect as intended. Furthermore, an
incorrectly fastened seat belt can cause addi- tional injury, for example, in an accident, dur- 44
Occupant safetySafety

The shoulder section of the belt must always
run over the center of the shoulder. Adjust the
belt outlet if necessary.
X To raise: slide the belt outlet upwards.
The belt outlet engages in various posi-
tions.
X To lower: slide the belt outlet downward,
pressing belt outlet release catch 0043.
X Once the desired position has been
reached, release belt outlet release
catch 0043and ensure the belt outlet
engages in place.
All seat belts in the vehicle, except the driv-
er's seat belt, are equipped with a special seat belt retractor to secure child restraint sys-
tems properly. Further information can be
found under "Special seat belt retractor"
(Y page 60).
Seat belt for the center rear seat If the left-hand rear seat backrest is folded
down and back up again, the rear center seat
belt may lock. The seat belt can then not be
pulled out.
X To release the rear center seat belt: pull
the seat belt out approximately 1 in
(25 mm) at the belt outlet on the backrest
and then release it again.
The seat belt is retracted and released.
Releasing seat belts !
Make sure that the seat belt is fully rolled
up. Otherwise, the seat belt or belt tongue
will be trapped in the door or in the seat
mechanism. This could damage the door,
the door trim panel and the seat belt. Dam- aged seat belts can no longer fulfill their
protective function and must be replaced.
Visit a qualified specialist workshop. X
Press release button 0043, hold belt
tongue 0044firmly and guide it back towards
belt outlet 0087.
Seat belt adjustment The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. This
function adjusts the driver's and front-
passenger seat belt to the upper body of the
occupants.
The belt strap is tightened slightly when:
R the belt tongue is engaged in the buckle
and
R the ignition is switched on
The seat-belt adjustment will apply a certain
tightening force if any slack is detected
between the vehicle occupant and the seat
belt. Do not hold on to the seat belt tightly
while it is adjusting.
You can switch the seat-belt adjustment on
and off using COMAND or Audio 20. Informa- tion on activating and deactivating the seat-
belt adjustment function can be found in the
Digital Operator's Manual or in the separate
COMAND or Audio 20 operating instructions. Occupant safety
47Safety Z

Occupant Classification System opera-
tion (OCS) 0043
PASSENGER AIR BAG ON indicator lamp
0044 PASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether the
front-passenger front air bag is deactivated or enabled.
X Press the Start/Stop button once or twice,
or turn the SmartKey to position 1or 2in
the ignition lock.
The system carries out a self-diagnosis.
The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps
must light up simultaneously for approx-
imately six seconds.
The indicator lamps display the status of the
front-passenger front air bag.
R PASSENGER AIR BAG ON 0043lights up: the
front-passenger front air bag is enabled. If,
in the event of an accident, all deployment
criteria are met, the front-passenger front
air bag is deployed.
R PASSENGER AIR BAG OFF 0044lights up: the
front-passenger front air bag is deactiva-
ted. They will then not be deployed in the
event of an accident.
If the status of the front-passenger front air
bag changes while the vehicle is in motion, an
air bag display message appears in the instru-
ment cluster (Y page 263). When the front-
passenger seat is occupied, always pay atten-
tion to the PASSENGER AIR BAG ON and
PASSENGER AIR BAG OFF indicator lamps. Be aware of the status of the front-passenger front air bag both before and during the jour-
ney. G
WARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag is disabled. It will not be deployed in the event of
an accident and cannot perform its intended
protective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury.
When the front-passenger seat is occupied,
always ensure that:
R the classification of the person in the front-
passenger seat is correct and the front-
passenger front air bag is enabled or disa-
bled in accordance with the person in the
front-passenger seat
R the front-passenger seat has been moved
back as far back as possible.
R the person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front air bag is correct. G
WARNING
If you secure a child in a rearward-facing child
restraint system on the front-passenger seat
and the PASSENGER AIR BAG ON indicator
lamp is lit up, the front-passenger front air bag may deploy in an accident. The child could be
struck by the air bag. This poses an increased risk of injury or even fatal injury.
Make sure that the front-passenger front air
bag has been disabled. The PASSENGER AIR
BAG OFF indicator lamp must be lit.
If the PASSENGER AIR BAG OFF indicator
lamp remains off and/or the PASSENGER AIR BAG ON indicator lamp lights up, do not install
a rearward-facing child restraint system on
the front-passenger seat. You can find more
information on OCS under "Problems with the 52
Occupant safetySafety

Important safety notes
The intervention of PRE-SAFE
®
PLUS cannot
prevent an imminent collision.
The driver is not warned when PRE-SAFE ®
PLUS intervenes.
PRE-SAFE ®
PLUS does not intervene if the
vehicle is backing up.
PRE-SAFE ®
PLUS does not perform braking
actions while the vehicle is in motion or when Parking Guidance is active.
Function PRE-SAFE
®
PLUS intervenes in certain situa-
tions if the radar sensor system detects an
imminent head-on or rear-end collision.
PRE-SAFE ®
PLUS takes the following meas-
ures depending on the hazardous situation
detected:
R if the radar sensor system detects that a
head-on collision is imminent, the seat
belts are pre-tensioned.
R if the radar sensor system detects that a
rear-end collision is imminent:
- the brake pressure is increased if the
driver applies the brakes when the vehi-
cle is stationary.
- the seat belts are pre-tensioned.
The PRE-SAFE ®
PLUS braking application is
canceled:
R if the accelerator pedal is depressed when
a gear is engaged
R if the risk of a collision passes or is no lon-
ger detected
R if DISTRONIC PLUS indicates an intention
to pull away
If the hazardous situation passes without
resulting in an accident, the original settings
are restored. Automatic measures after an acci-
dent
Immediately after an accident, the following
measures are implemented, depending on
the type and severity of the impact:
R the hazard warning lamps are activated
R the emergency lighting is activated
R the vehicle doors are unlocked
R the front side windows are lowered
R vehicles with a memory function: the elec-
trically adjustable steering wheel is raised
R the engine is switched off
R vehicles with mbrace: automatic emer-
gency call Children in the vehicle
Important safety notes
Accident statistics show that children
secured in the rear seats are safer than chil-
dren secured in the front-passenger seat. For
this reason, Mercedes-Benz strongly advises
that you install a child restraint system on a
rear seat. Children are generally better pro-
tected there.
If a child younger than 12 years and under 5 ft
(1.50 m) in height is traveling in the vehicle:
R always secure the child in a child restraint
system suitable for Mercedes-Benz vehi-
cles. The child restraint system must be
appropriate to the age, weight and size of
the child
R be sure to observe the instructions and
safety notes in this section in addition to
the child restraint system manufacturer's
installation instructions
R be sure to observe the instructions and
safety notes on the "Occupant classifica-
tion system (OCS)" (Y page 51) Children in the vehicle
59Safety Z

G
WARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion by, for example:
R release the parking brake.
R shift the automatic transmission out of the
parking position P.
R start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. 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 unsupervised in the vehicle. G
WARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. G
WARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularly on the metal parts of the child
restraint system. There is a risk of injury.
If you leave the vehicle, taking the child with
you, always ensure that the child restraint
system is not exposed to direct sunlight. Pro- tect it with a blanket, for example. If the childrestraint system has been exposed to direct
sunlight, let it cool down before securing the
child in it. Never leave children unattended in the vehicle.
Always ensure that all vehicle occupants have
their seat belts fastened correctly and are sit- ting properly. Particular attention must be
paid to children.
Observe the safety notes on the seat belt
(Y page 44) and the notes on correct use of
seat belts (Y page 45).
A booster seat may be necessary to achieve
proper seat belt positioning for children over 41 lbs (18 kg) or until they reach a height
where a lap/shoulder belt can be fastened
properly without a booster seat. Special seat belt retractor
G
WARNING
If the seat belt is released while driving, the
child restraint system will no longer be
secured properly. The special seat belt retrac- tor is disabled and the inertia real draws in a
portion of the seat belt. The seat belt cannot
be immediately refastened. There is an
increased risk of injury, possibly even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat belt retractor and secure the
child restraint system properly.
All seat belts in the vehicle, except the driv-
er's seat belt, are equipped with a special seat belt retractor. When activated, the special
seat belt retractor ensures that the seat belt
cannot slacken once the child seat is secured.
Installing a child restraint system:
X Make sure you observe the child restraint
system manufacturer's installation instruc- tions.
X Pull the seat belt smoothly from the belt
outlet.
X Engage seat belt tongue in belt buckle.
Activating the special seat belt retractor:
X Pull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should hear a ratcheting sound. The special seat
belt retractor is enabled.
X Push the child restraint system down so
that the seat belt is tight and does not
loosen. 60
Children in the vehicleSafety