ECU MERCEDES-BENZ CLS 2016 Service Manual

Safety systems Warning/
indicator
lamp Q Signal type
Possible causes/consequences and P Solutions
'M
Q ' (USA only) or M (Canada only): the red brake system warning lamp is
lit while the vehicle is moving. A warning tone also sounds.
You are driving with the parking brake applied. X
Release the parking brake.
The warning lamp goes out and the warning tone ceases.
'M
Q ' (USA only) or M (Canada only): the red brake system warning lamp is
lit while the engine is running. A warning tone also sounds.
G WARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is a risk of an accident. X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 146).X
Consult a qualified specialist workshop. X
Observe the additional display messages in the multifunction display.
'M
Q ' (USA only) or M (Canada only): the red brake system warning lamp is
lit while the engine is running. A warning tone also sounds.
G WARNING
There is not enough brake fluid in the brake fluid reservoir.
The braking effect may be impaired.
There is a risk of an accident. X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 146).X
Do not add brake fluid. Adding more will not correct the malfunction. X
Consult a qualified specialist workshop. X
Observe the additional display messages in the multifunction display.Warning and indicator lamps in the instrument cluster 237
On-board computer and displays Z

Tires Warning/
indicator
lamp Q Signal type
Possible causes/consequences and P Solutions
w
Q The yellow combination low tire pressure telltale/TPMS malfunction telltale for
the TPMS (pressure loss or malfunction) is lit.
The tire pressure monitor has detected a loss of pressure in at least one of the tires.
G WARNING
Tire pressures that are too low pose the following hazards: R
they may burst, especially as the load and vehicle speed increase. R
they may wear excessively and/or unevenly, which may greatly impair tire trac-
tion. R
the driving characteristics, as well as steering and braking, may be greatly
impaired.
There is a risk of an accident. X
Stop the vehicle without making any sudden steering or braking maneuvers. Pay
attention to the traffic conditions as you do so. X
Secure the vehicle against rolling away ( Y
page 146).X
Observe the additional display messages in the multifunction display. X
Check the tires and, if necessary, follow the instructions for a flat tire
( Y
page 287). X
Check the tire pressure ( Y
page 308).X
If necessary, correct the tire pressure.
w
Q The yellow tire pressure monitor warning lamp (pressure loss/malfunction)
flashes for approximately one minute and then remains lit.
The tire pressure monitor is faulty.
G WARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident. X
Observe the additional display messages in the multifunction display. X
Visit a qualified specialist workshop immediately.244
Warning and indicator lamps in the instrument cluster
On-board computer and displays

Multimedia system: X
Select Vehicle { System Set‐
tings { Activate Bluetooth .X
Activate Bluetooth ®
s .
Mobile phone: X
Activate Bluetooth ®
and, if necessary, Blue-
tooth ®
visibility for other devices (see the
manufacturer's operating instructions).
The Bluetooth ®
device names for all of one man-
ufacturer's products might be identical. To
make it possible to clearly identify your mobile
phone, change the device name (see the man-
ufacturer's operating instructions).
If the mobile phone supports the PBAP ( P hone
B ook A ccess P rofile) and MAP ( M essage
A ccess P rofile) Bluetooth ®
profiles, the follow-
ing information will be transmitted after you
connect: R
Phone book R
Call lists R
Text messages and e-mails
i Further information on suitable mobile
phones can be obtained on the Internet at:
http://www.mercedes-benz.com/
connect
i In the USA you can also contact the
Mercedes-Benz Customer Assistance Center
at 1-800-FOR-MERCedes (1-800-367-6372).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-0100.
Searching for and authorizing a mobile
phone Before using your mobile phone with the multi-
media system for the first time, you will need to
search for the phone and then authorize (con-
nect) it. Depending on the mobile phone, author-
ization either takes place by means of Secure
Simple Pairing or by entering a passkey. The
multimedia system automatically makes the
procedure that is relevant for your mobile phone
available. The mobile phone is always connec-
ted automatically after authorization. Further
information on using a mobile phone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular security settings on your mobile phone (see the
manufacturer's operating instructions).
Only one mobile phone can be connected to the
multimedia system at any one time.
Searching for a mobile phone
Multimedia system: X
Select Tel/

Stowage areas
Loading guidelines
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.
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.
G WARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
The handling characteristics of a laden vehicle
are dependent on the distribution of the load
within the vehicle. For this reason, you should
observe the following notes when transporting a
load: R
Never exceed the maximum permissible
gross vehicle mass or the gross axle weight
rating for the vehicle (including occupants).
The values are specified on the vehicle iden- tification plate on the B-pillar of the driver's
door. R
The trunk is the preferred place to carry
objects. R
Position heavy loads as far forwards as pos-
sible and as low down in the trunk as possible. R
The load must not protrude above the upper
edge of the seat backrests. R
Always place the load against the rear or front
seat backrests. Make sure that the seat
backrests are securely locked into place. R
Always place the load behind unoccupied
seats if possible. R
Use the cargo tie-down rings and the parcel
nets to transport loads and luggage. R
Use cargo tie-down rings and fastening mate-
rials appropriate for the weight and size of the
load. R
Secure the load with sufficiently strong and
wear-resistant tie-downs. Pad sharp edges for
protection.
Stowage spaces
Important safety notes
G WARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants. In
addition, cupholders, open stowage spaces
and mobile phone brackets cannot always
retain all objects they contain. There is a risk
of injury, particularly in the event of sudden
braking or a sudden change in direction. R
Always stow objects so that they cannot be
thrown around in such situations. R
Always make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets. R
Close the lockable stowage spaces before
starting a journey. R
Always stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
Observe the loading guidelines ( Y
page 251).Stowage areas 251
Stowage and features Z

X
Briefly press trim C .
i The stowage tray can be removed.
Stowage compartment under the arm-
rest X
To open: pull handle C up.
The armrest folds out.
Depending on the vehicle's equipment, the fol-
lowing may be in the stowage compartment: a
multimedia connector unit with an SD card slot
and 2 USB ports (Media Interface), e.g. for use
with an iPod ®
, iPhone ®
or MP3 player; see the
separate operating instructions.
Stowage compartment under the front
seats
G WARNING
If you exceed the maximum load for the stow-
age compartment, the cover may not be able
to restrain the items. Items may be thrown out
of the stowage compartment and hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Never exceed the maximum permissible load
for the stowage compartment. Stow and
secure heavy objects in the trunk.
The maximum permissible load of the stowage
compartment is 3.3 lbs (1.5 kg). X
To open: pull handle C up and fold cover D
forwards.
i On vehicles with a fire extinguisher, the fire
extinguisher is located in the stowage com-
partment under the driver's seat.
Stowage compartments in the rear cen-
ter console
X
To open: slide covers C and D in the direc-
tion of the arrow.
i There is a 12 V power socket in the front
stowage compartment.
Stowage compartment in the rear seat
armrest
! Do not sit on or support your body weight on
the rear seat armrest when it is folded down,
as you could otherwise damage it.
! Close the cover of the stowage compart-
ment before folding the rear seat armrest
back into the seat backrest.Stowage areas 253
Stowage and features Z

backrest back. Otherwise, it could be dam-
aged.
X
Move the driver's or front-passenger seat
forward if necessary. X
Fold rear seat backrest C back until it
engages.
If the rear seat backrest is not engaged and
locked, this will be shown in the multifunction
display in the instrument cluster. A warning
tone also sounds. X
Move the driver's or front-passenger seat
back if necessary.
i You should always engage the rear seat
backrests if you do not need the through-
loading feature. This will prevent unauthor-
ized access to the trunk from the vehicle inte-
rior.
Securing cargo
Cargo tie-down rings
General notes
Observe the following notes on securing loads: R
Observe the loading guidelines ( Y
page 251).R
Secure the load using the cargo tie-down
rings. R
Distribute the load on the cargo tie-down
rings evenly. R
Do not use elastic straps or nets to secure a
load, as these are only intended as an anti-slip
protection for light loads. R
Do not route tie-downs across sharp edges or
corners. R
Pad sharp edges for protection. Trunk
C
Cargo tie-down rings
EASY-PACK trunk box
Important safety notes
G WARNING
When the load surface moves up, your hands
may become trapped on the frame of the
EASY-PACK trunk box. There is a risk of injury.
When the load surface moves up, make sure
that your hands are not within the sweep of
the load surface. If someone becomes trap-
ped, carefully push the center of the load sur-
face downward.
! When the EASY-PACK trunk box is pulled
out, no objects may be placed on the frame of
the box, nor should the frame be pushed from
above. Otherwise, the box could be damaged.
! Sharp-edged, pointed or fragile objects can
damage the EASY-PACK trunk box and then
be thrown out. There is a risk of injury.
Do not transport sharp-edged, pointed or
fragile objects in the EASY-PACK trunk box.
Always store and secure these or similar
objects in the trunk outside of the EASY-PACK
trunk box.
! If you exceed the maximum permitted load
of the EASY-PACK trunk box, objects can be
thrown out of the EASY-PACK trunk box and
strike vehicle occupants. There is a risk of
injury, particularly in the event of sudden
braking or a sudden change in direction.
Always observe the maximum permitted load
of the EASY-PACK trunk box. Always storeStowage areas 255
Stowage and features Z

and secure heavy objects in the trunk outside
of the EASY-PACK trunk box.
The maximum permitted load of the EASY-PACK
trunk box is 22 lbs (10 kg). With a load of above
approximately 11 lbs (5 kg), the bottom of the
box moves downward until it rests on the mat of
the trunk floor. Thus, overloading of the box is
avoided.
Adjusting the height to any position X
Pull the box out by handle C in the direction
of the arrow all the way to the stop. X
Lowering the load surface : push the center
of load surface D down by hand in the direc-
tion of the arrow until load surface D has
reached the desired position and the box is
the desired size. X
To raise the load surface: press switch

X
Hook handle C into rain trough D .
Roof carrier
Important safety notes
G WARNING
When you load the roof, the center of gravity
of the vehicle rises and the driving character-
istics change. If you exceed the maximum roof
load, the driving characteristics, as well as
steering and braking, will be greatly impaired.
There is a risk of an accident.
Never exceed the maximum roof load and
adjust your driving style.
! Mercedes-Benz recommends that you only
use roof carriers that have been tested and
approved for Mercedes-Benz vehicles. This
helps to prevent damage to the vehicle.
Position the load on the roof carrier in such a
way that the vehicle will not sustain damage
even when it is in motion.
Ensure that, depending on the vehicle's
equipment, you can raise the sliding sunroof
fully and open the trunk lid fully when the roof
carrier is installed.
! To avoid damaging or scratching the covers,
do not use metallic or hard objects to open
them.
You will find information on the maximum roof
load in the "Technical data" section
( Y
page 336).
An incorrectly secured roof carrier or roof load
may become detached from the vehicle. You
must therefore ensure that you observe the roof
carrier manufacturer's installation instructions. Attaching the roof carrier X
Open covers C carefully in the direction of
the arrow. X
Only secure the roof carrier to the anchorage
points under covers C .X
Observe the manufacturer's installation
instructions.
Features
Cup holder
Important safety notes
G WARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants. In
addition, cupholders, open stowage spaces
and mobile phone brackets cannot always
retain all objects they contain. There is a risk
of injury, particularly in the event of sudden
braking or a sudden change in direction. R
Always stow objects so that they cannot be
thrown around in such situations. R
Always make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets. R
Close the lockable stowage spaces before
starting a journey. R
Always stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
! Do not expose drinks bottles in the cup
holder in the center console to continuous, Features 257
Stowage and features Z

X
Swing the rear seat armrest cover back down,
if necessary. X
To close: raise the rear seat armrest cover.
Swing cup holder D back until it engages.
Bottle holder
G WARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants. In
addition, cupholders, open stowage spaces
and mobile phone brackets cannot always
retain all objects they contain. There is a risk
of injury, particularly in the event of sudden
braking or a sudden change in direction. R
Always stow objects so that they cannot be
thrown around in such situations. R
Always make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets. R
Close the lockable stowage spaces before
starting a journey. R
Always stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
Observe the loading guidelines ( Y
page 251).
! Make sure that any bottles weighing more
than 1.1 lb(0.5 kg) that are stored in the bottle
holder, rest on the vehicle floor. The bottle
holder could otherwise be damaged.
X
Press the outer edge of button C and slide in
the direction of the arrow until the bottle fits
into the opening. X
Insert the bottle into the bottle holder. The bottle holder is suitable for bottles with a
capacity of 25 fl. oz. (0.7 l) to 54 fl. oz. (1.5 l).
The bottle holder does not secure the bottles; it
merely prevents them from tipping over.
Sun visors
Overview
G WARNING
If the mirror cover of the vanity mirror is folded
up when the vehicle is in motion, you could be
blinded by incident light. There is a risk of an
accident.
Always keep the mirror cover folded down
while driving.
C
Mirror light D
Bracket

event of an emergency, help will have to be
summoned by other means.
Have the system checked at the nearest author-
ized Mercedes-Benz Center or contact the fol-
lowing service hotlines:
Mercedes-Benz Customer Assistance Center at
1-800-FOR-MERCedes (1-800-367-6372) or
1-866-990-9007
Emergency call Important safety notes
G WARNING
It can be dangerous to remain in the vehicle,
even if you have pressed the SOS button in an
emergency if: R
you see smoke inside or outside of the vehi-
cle, e.g. if there is a fire after an accident R
the vehicle is on a dangerous section of
road R
the vehicle is not visible or cannot easily be
seen by other road users, particularly when
dark or in poor visibility conditions
There is a risk of an accident and injury.
Leave the vehicle immediately in this or simi-
lar situations as soon as it is safe to do so.
Move to a safe location along with other vehi-
cle occupants. In such situations, secure the
vehicle in accordance with national regula-
tions, e. g. with a warning triangle.
General notes
Observe the notes on system activation
( Y
page 263).
An emergency call is dialed automatically if an
air bag or Emergency Tensioning Device is trig-
gered. You cannot end an automatically trig-
gered emergency call yourself.
An emergency call can also be initiated man-
ually.
As soon as the emergency call has been initi-
ated, the indicator lamp in the SOS button
flashes. The Connecting Call message
appears in the multifunction display.
The audio output is muted.
Once the connection has been made, the Call
Connected message appears in the multifunc-
tion display. All important information on the emergency is
transmitted, for example: R
current location of the vehicle (as determined
by the GPS system) R
vehicle identification number R
information on the severity of the accident
Shortly after the emergency call has been initi-
ated, a voice connection is automatically estab-
lished between the Customer Assistance Center
and the vehicle occupants. R
If the vehicle occupants respond, the
Mercedes-Benz Customer Assistance Center
attempts to get more information on the
emergency. R
If there is no response from the vehicle occu-
pants, an ambulance is immediately sent to
the vehicle.
If no voice connection can be established to the
Mercedes-Benz Customer Assistance Center,
the system has been unable to initiate an emer-
gency call.
This can occur, for example, if the relevant
mobile phone network is not available. The indi-
cator lamp in the SOS button flashes continu-
ously.
The Call Failed message appears in the mul-
tifunction display and must be confirmed.
In this case, summon assistance by other
means.
Making an emergency call
X
To initiate an emergency call manually:
press cover C briefly to open. X
Press and hold the SOS button for at least one
second D .
The indicator lamp in SOS button D flashes
until the emergency call is concluded.264
Features
Stowage and features