engine MERCEDES-BENZ C-Class SEDAN 2015 W205 Owner's Guide

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 298). Unlocking and opening doors from
the inside
You can open a door from inside the vehicle
even if it has been locked. You can only open
the rear doors from inside the vehicle if they
are not secured by the child-proof locks
(Y page 65). If the vehicle has been locked
with the SmartKey or with KEYLESS-GO,
opening a door from the inside will trigger the
anti-theft alarm system. Switch off the alarm
(Y page 76). X
To unlock and open a front door: pull
door handle 0044.
If the door is locked, locking knob 0043pops
up. The door is unlocked and opens.
X To unlock a rear door: pull door han-
dle 0044.
Locking knob 0043pops up and the door
unlocks.
X To open a rear door: pull door handle0044
again.
The door opens. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock and unlock the vehicle from the inside. The switches are on the
driver’s door. X
To unlock: press button 0043.
X To lock: press button 0044.
If the front-passenger door is closed, the
vehicle locks. Doors
87Opening and closing Z

X
Insert the mechanical key into the lock of
the driver's door as far as it will go.
X Turn the mechanical key clockwise as far as
it will go to position 0047.
The locking knob drops down and the driv- er's door is locked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the Smart-
Key.
X Make sure that the doors and the trunk lid
are locked.
X Hold the cover over the lock of the driver's
door with the thicker end towards the front of the vehicle and press to secure. Then
make sure that the slit of the cover is hor-
izontal.
Vehicles without KEYLESS-GO: X
Insert the mechanical key into opening 0043
in the protective cap.
X Pull and hold the door handle. X
Pull the protective cap on the mechanical
key as straight as possible away from the
vehicle until it releases.
X Release the door handle. X
Insert the mechanical key into the lock of
the driver's door as far as it will go.
X Turn the mechanical key clockwise as far as
it will go to position 0047.
The locking knob drops down and the driv- er's door is locked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the Smart-
Key (Y page 83).
X Make sure that the doors and the trunk lid
are locked.
X Carefully press the protective cap onto the
lock cylinder until it engages and is seated
firmly. Do not pull the door handle when
doing so.
All vehicles:
If you lock the vehicle as described above, the fuel filler flap is not locked. The anti-theft
alarm system is not armed. Trunk
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running, 90
TrunkOpening and closing

especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open. G
WARNING
If objects, luggage or loads are not secured or not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the "Vehicle data" section
(Y page 403).
i You can limit the opening angle of the
trunk lid in COMAND or Audio 20 (see the
separate operating instructions).
Do not leave the SmartKey in the trunk. You
could otherwise lock yourself out.
You should preferably place luggage or loads
in the trunk. Observe the loading guidelines
(Y page 298). Obstacle recognition with trunk lid
reversing feature
Vehicles with trunk lid remote closing
feature: the trunk lid is equipped with auto-
matic obstacle detection with reversing fea-
ture. If a solid object blocks or restricts the
trunk lid when automatically opening, this
procedure is stopped. If a solid object blocks
or restricts the trunk lid when automatically
closing, the trunk lid opens again automati-
cally. The automatic obstacle recognition with reversing feature is only an aid. It is not a
substitute for your attentiveness when open- ing and closing the trunk lid. G
WARNING
The reversing feature does not react:
R to soft, light and thin objects, e.g. small fin-
gers
R over the last 1/3 in(8 mm) of the closing
movement
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped:
R press the 0054button on the SmartKey, or
R press the remote operating switch on the
driver's door, or
R press the closing or locking button on the
trunk lid, or
R pull on the trunk lid handle
Vehicles with HANDS-FREE ACCESS: it is
also possible to stop the closing process by
performing a kicking movement under the
rear bumper. Opening and closing manually
Opening Trunk
91Opening and closing Z

X
Press the 0054button on the SmartKey.
or X Pull handle 0043.
The trunk lid opens.
Closing X
Pull the trunk lid down using recess 0043and
push it closed.
X Lock the vehicle if necessary with the 0037
button on the SmartKey or with KEYLESS-
GO (Y page 81). Opening/closing automatically from
outside
Important safety notes G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the trunk lid. More-
over, people, e.g. children, may be standing in the closing area or may enter the closing area
during the closing process. There is a risk of
injury.
Make sure that nobody is in the vicinity of the closing area during the closing process.
Use one of the following options to stop the
closing process:
R Press the 0054button on the key.
R press the remote operating switch on the
driver's door. R
Press the closing or locking button on the
trunk lid.
R Pull the trunk lid handle.
Vehicles with HANDS-FREE ACCESS: it is
also possible to stop the closing process by
performing a kicking movement under the
rear bumper. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the "Vehicle data" section
(Y page 403).
Opening You can open the trunk lid automatically
using the SmartKey or the handle in the trunk
lid.
X Press and hold the 0054button on the
SmartKey until the trunk lid opens.
or X If the trunk lid is unlocked, pull the trunk lid
handle and let it go again immediately. 92
TrunkOpening and closing

Closing
X
Press closing button 0043on the trunk lid.
Vehicles with trunk lid remote closing
feature and KEYLESS-GO: when the driver's
door is closed you can simultaneously close
the trunk lid and lock the vehicle. The KEY-
LESS-GO key must be in the rear detection
range of the vehicle.
X Press locking button 0044in the trunk lid.
If KEYLESS-GO detects a SmartKey outside the vehicle, the trunk lid closes and the
vehicle is locked.
If KEYLESS-GO detects a SmartKey in the
trunk, the trunk lid opens again after it is
closed.
If KEYLESS-GO detects a second SmartKey
outside the vehicle, the trunk lid remains
closed. Opening automatically from outside
Important safety notes G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open. !
The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the printed Operator's Manual. HANDS-FREE ACCESS
Important safety notes G
WARNING
The vehicle's exhaust system may be very hot. You could burn yourself by touching the
exhaust system if you use HANDS-FREE
ACCESS. There is a risk of injury. Always
ensure that you only make the kicking move-
ment within the detection range of sensors.
! If the SmartKey is within the rear detec-
tion range of KEYLESS-GO, the following
situations, for example, could lead to the
unintentional opening of the trunk:
R using a car wash
R using a power washer
Make sure that the SmartKey is at least
10 ft (3m) away from the vehicle.
General notes With KEYLESS-GO and HANDS-FREE
ACCESS, you can open or close the trunk lid
or stop the procedure without using your
hands. This is useful if you have your hands
full. To do this, make a kicking movement
under the bumper with your foot.
Observe the following points:
R Carry your KEYLESS-GO key about your
person. The KEYLESS-GO key must be in
the rear detection range of the vehicle.
R When making the kicking movement, make
sure that you are standing firmly on the
ground and that there is sufficient clear-
ance to the rear of the vehicle. You could
otherwise lose your balance e.g. on ice. Trunk
93Opening and closing Z

R
Always ensure that you only make the kick-
ing movement within the detection range of
sensors 0043.
R Stand at least 12 in (30 cm) away from the
rear area while doing so.
R Do not come into contact with the bumper
while making the kicking movement. Oth-
erwise, the sensors may not function cor-
rectly.
R HANDS-FREE ACCESS does not function
when the engine is started.
R If a KEYLESS-GO key is within the rear
detection range of KEYLESS-GO, HANDS-
FREE ACCESS could be triggered. The trunk
lid could thus be opened or closed unin-
tentionally, for example, if you:
- set something down or lift something up
behind the vehicle.
- polish the rear of the vehicle.
Do not carry the KEYLESS-GO key about
your person in these situations or in situa-
tions similar to these. This will prevent the
unintentional opening/closing of the trunk.
R Dirt caused by road salt around sensors 0043
may restrict functionality.
R Using the HANDS-FREE ACCESS with a
prosthetic leg may restrict functionality. Operation X
To open/close: kick into sensor detection
range 0043under the bumper with your foot.
You will hear a warning tone while the trunk lid is opening or closing.
X If the trunk lid does not open after sev-
eral attempts: wait at least ten seconds
then move your leg under the bumper once again.
If you hold your foot under the bumper for too
long, the trunk lid does not open or close.
Repeat the leg movement more quickly if this occurs.
To stop the opening or closing procedure:
R move your foot in sensor detection
range 0043under the bumper, or
R pull the handle on the outside of the trunk
lid or
R press the closing button in the trunk lid or
R press the 0054button on the SmartKey
If the trunk lid closing procedure has been
stopped:
R move your foot under the bumper again and
the trunk lid will open.
If the trunk lid opening procedure has been
stopped:
R move your foot under the bumper again and
the trunk lid will close. 94
TrunkOpening and closing

Opening/closing automatically from
inside
Important safety notes G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the trunk lid. More-
over, people, e.g. children, may be standing in the closing area or may enter the closing area
during the closing process. There is a risk of
injury.
Make sure that nobody is in the vicinity of the closing area during the closing process.
Use one of the following options to stop the
closing process:
R Press the 0054button on the key.
R press the remote operating switch on the
driver's door.
R Press the closing or locking button on the
trunk lid.
R Pull the trunk lid handle.
Vehicles with HANDS-FREE ACCESS: it is
also possible to stop the closing process by
performing a kicking movement under the
rear bumper. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the "Vehicle data" section
(Y page 403). Opening and closing
You can open and close the trunk lid from the
driver's seat when the vehicle is stationary
and unlocked.
X To open: pull remote operating switch for
trunk lid 0043until the trunk lid opens.
X To close: press remote operating switch
for trunk lid 0043until the trunk lid is com-
pletely closed. Opening automatically from inside
Important safety notes G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the printed Operator's Manual. Trunk
95Opening and closing Z

Opening and closing the side win-
dows
The switches for all side windows are located
on the driver's door. There is also a switch on
each door for the corresponding side window.
The switches on the driver's door take prec-
edence. 0043
Front left
0044 Front right
0087 Rear right
0085 Rear left
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 157).
X To open manually: press and hold the cor-
responding switch.
X To open fully: press the switch beyond the
point of resistance and release it.
Automatic operation is started.
X To close manually: pull the corresponding
switch and hold it.
X To close fully: pull the switch beyond the
point of resistance and release it.
Automatic operation is started.
X To interrupt automatic operation:
press/pull the corresponding switch again.
If you press the switch beyond the point of
resistance and release, automatic operation
is started in the corresponding direction. You
can stop automatic operation by pressing/
pulling the switch again.
You can continue to operate the side windows after you switch off the engine or remove the SmartKey. This function remains active for
five minutes or until you open a front door.
When the override feature for the side win-
dows is activated (Y page 65), the side win-
dows cannot be operated from the rear.
i Information on opening and closing the
roller sunblinds on the rear side windows
(Y page 308). Convenience opening
General notes Vehicles with KEYLESS-GO or KEYLESS-
GO start function:
you can ventilate the vehi-
cle before you start driving.
If the SmartKey is in close proximity to the
vehicle, the convenience opening function is
available.
To do this, the SmartKey is used to carry out
the following functions simultaneously:
R unlock the vehicle
R open the side windows
R open the sliding sunroof or the panorama
roof with power tilt/sliding panel and the
roller sunblind
R switch on the seat ventilation for the driv-
er's seat
Convenience opening X
Press and hold the 0036button until the
side windows and the sliding sunroof or the
panorama roof with power tilt/sliding
panel are in the desired position.
If the roller sunblinds of the panorama roof
with power tilt/sliding panel are closed, the roller sunblinds are opened first.
X Press and hold the 0036button again until
the panorama roof with power tilt/sliding
panel is in the desired position.
X To interrupt convenience opening:
release the 0036button. 98
Side windowsOpening and closing

X
Turn the SmartKey to position 1or 2in the
ignition lock (Y page 157).
X Press or pull the 0057switch in the corre-
sponding direction.
If you press or pull the 0057switch beyond
the point of resistance, automatic operation
is started in the corresponding direction. You can stop automatic operation by pressing or
pulling again.
When opening and raising the roof, automatic
operation is only available if the sliding sun-
roof is in the closed position.
The sun protection cover automatically opens along with the sliding sunroof. You can open
or close the sun protection cover manually
when the sliding sunroof is raised or closed.
You can continue to operate the sliding sun-
roof after switching off the engine or remov-
ing the SmartKey from the ignition lock. This
function is available for up to five minutes or
until the driver's or front-passenger door is
opened.
Resetting !
If the sliding sunroof still cannot be
opened or closed fully after resetting, con- tact a qualified specialist workshop.
Reset the sliding sunroof if it does not move
smoothly. X Turn the SmartKey to position 1or 2in the
ignition lock.
X Raise the sliding sunroof fully at the rear
(Y page 102).
X Keep the 0057switch pressed for another
second.
X Make sure that the sliding sunroof can be
fully opened and closed again
(Y page 102).
X If this is not the case, repeat the steps
above again. Operating the panorama roof with
power tilt/sliding panel
Opening and closing Overhead control panel
0043
To raise
0044 To open
0087 To close/lower
The panorama roof with power tilt/sliding
panel can only be operated when the roller
sunblind is open.
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 157).
X Press or pull the 0057switch in the corre-
sponding direction.
If you press or pull the 0057switch beyond
the point of resistance, automatic operation
is started in the corresponding direction. You can stop automatic operation by pressing or
pulling again.
If the panorama roof with power tilt/sliding
panel is raised at the rear, it automatically
lowers slightly at higher speeds. The noise
level in the vehicle interior is reduced as a
result. At low speeds it raises again automat-
ically.
You can continue to operate the panorama
roof with power tilt/sliding panel after you
switch off the engine or remove the Smart-
Key. This function remains active for five
minutes or until you open a front door.
When a roof carrier is mounted the panorama
roof with power tilt/sliding panel cannot be
opened. The panorama roof with power tilt/ Sliding sunroof
103Opening and closing 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). Correct driver's seat position
G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. X
Observe the safety guidelines on seat
adjustment (Y page 109).
X Make sure that seat 0087is adjusted prop-
erly.
Electrical seat adjustment (Y page 110)
When adjusting the seat, make sure that:
R you are as far away from the driver's air bag
as possible
R you are sitting in a normal upright position
R you can fasten the seat belt properly
R you have moved the backrest to an almost
vertical position
R you have set the seat cushion angle so that
your thighs are gently supported
R you can depress the pedals properly.
R your legs are not fully extended
X Check whether the head restraint is adjus-
ted properly.
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by the center of the head restraint.
X Observe the safety guidelines on steering
wheel adjustment (Y page 115).
X Make sure that steering wheel 0043is adjus-
ted properly.
Adjust the steering wheel manually
(Y page 115)
Adjust the steering wheel electrically
(Y page 116)
When adjusting the steering wheel, make
sure that:
R you can hold the steering wheel with your
arms slightly bent
R you can move your legs freely
R you can see all the displays in the instru-
ment cluster clearly
X Observe the safety guidelines for seat belts
(Y page 44).
X Check whether you have fastened seat
belt 0044properly (Y page 46).108
Correct driver's seat positionSeats, steering wheel and mirrors