2016 MERCEDES-BENZ C-CLASS CABRIOLET ECU

Warning and indicator lamps in the instrument cluster
General notes
Some systems carry out a self-diagnosis when the ignition is switched on. In the process, several
warning and indicator lamps may temporarily light up or flash. This is not an indication of any
problem. These warning and indicator lamps only indicate a malfunction if they light up or flash after
the engine is started or during a journey. Safety
Seat belts Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ü
N
Only for certain countries: the red seat belt warning lamp lights up for 6 seconds
after the engine starts.
The seat belt warning lamp reminds the driver and front passenger to fasten their
seat belts.
X Fasten your seat belt (Y page 46).ü
N
Only for certain countries: the red seat belt warning lamp lights up after the
engine starts. In addition, a warning tone sounds for up to 6 seconds.
The driver's seat belt is not fastened.
X Fasten your seat belt (Y page 46).
The warning tone ceases. ü
N
The red seat belt warning lamp lights up after the engine starts, as soon as the
driver's or the front-passenger door is closed.
The driver or passenger has not fastened their seat belt.
X Fasten your seat belt (Y page 46).
The warning lamp goes out.
There are objects on the front-passenger seat.
X Remove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out. ü
N
The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or passenger has not fastened their seat belt. At the same time, you are
driving faster than 25 km/h or have briefly driven faster than 25 km/h.
X Fasten your seat belt (Y page 46).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. At the same time, you are driving
faster than 25 km/h or have briefly driven faster than 25 km/h.
X Remove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out and the intermittent warning tone ceases. Warning and indicator lamps in the instrument cluster
273On-board computer and displays Z

Safety systems
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions J
N
The yellow brake system warning lamp lights up while the engine is running or
the ECO start/stop function is switched on.
G WARNING
The brake system is malfunctioning and the braking characteristics may be affec- ted.
There is a risk of an accident.
X If the multifunction display shows a display message, please observe this.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. J
N
The red brake system warning lamp lights up 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 Stop the vehicle safely as soon as possible, paying attention to road and traffic
conditions. Do not continue driving.
X Secure the vehicle against rolling away (Y page 159).
X Consult a qualified specialist workshop.
X Observe the additional display messages on the multifunction display. J
N
The red brake system warning lamp lights up while the engine is running.
A warning tone also sounds.
There is insufficient brake fluid in the brake fluid reservoir.
G WARNING
Braking efficiency may be impaired.
There is a risk of an accident.
X Stop the vehicle safely as soon as possible, paying attention to road and traffic
conditions. Do not continue driving.
X Secure the vehicle against rolling away (Y page 159).
X Do not top up the brake fluid. Topping up will not correct the fault.
X Consult a qualified specialist workshop.
X Observe the additional display messages on the multifunction display. 274
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ?
N
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gauge is malfunctioning.
The coolant temperature is no longer being monitored. The engine could be dam-
aged if the coolant temperature is too high.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine. Do not continue driving.
X Secure the vehicle against rolling away (Y page 159).
X Consult a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
279On-board computer and displays Z

Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
M Solutions ?
N
The red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooled sufficiently.
X Observe the additional display messages on the multifunction display.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X Secure the vehicle against rolling away (Y page 159).
X Leave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and top up the coolant, making sure to observe the
warning notes (Y page 312).
X If you have to top up the coolant frequently, have the engine cooling system
checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by frozen
slush.
X Do not start the engine again until the coolant temperature is below 120 †. The
engine may otherwise be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-start traffic. ?
N
The red coolant warning lamp comes on while the engine is running. A warning
tone also sounds.
The coolant temperature has exceeded 120 †. The airflow to the engine radiator
may be blocked or the coolant level may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Never drive with an overheated engine. Driving when your engine is overheated
can cause any fluids that may have leaked into the engine compartment to catch fire.
In addition, steam from an overheated engine can cause serious burns, which can
occur just by opening the bonnet.
There is a risk of injury.
X Observe the additional display messages on the multifunction display.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X Secure the vehicle against rolling away (Y page 159).
X Leave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and top up the coolant, making sure to observe the
warning notes (Y page 312).
X If you have to top up the coolant frequently, have the engine cooling system
checked. 280
Warning and indicator lamps in the instrument clusterOn-board computer and displays

If the mobile phone supports the PBAP (Phone
Book Access Profile) and MAP (Message
Access Profile) Bluetooth ®
profiles, the follow-
ing information will be transmitted after you
connect:
R Phone book
R Call lists
R Messages
i Further information on suitable mobile
phones can be obtained on the Internet at:
http://www.mercedes-benz.com/
connect
Searching for and authorising 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 authorise (con-
nect) it. Depending on the mobile phone, author-
isation 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 connected automati-
cally after authorisation. Further information on using a mobile phone with the multimedia sys-
tem (see the Digital Owner'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
Audio 20:
X Select Tel/
Tel/®QConnect Connect
device deviceQSearch for phones Search for phonesQStart Start
search
search .
The available mobile phones are displayed.
COMAND Online:
X Select Telephone
TelephoneQConnect Connect
device
deviceQSearch for phones Search for phonesQStart Start
search
search .
The available mobile phones are displayed. Symbols in the device list Sym-
bol Explanation
Ï
New mobile phone found, not yet
authorised.
Ñ
Mobile phone is authorised, but is
not connected.
#
Mobile phone is authorised and
connected.
Connecting the mobile phone
Authorisation using Secure Simple Pairing:
X Select the mobile phone.
A code is displayed in the multimedia system
and on the mobile phone.
X If codes match: selectYes Yeson the multimedia
system.
X Confirm the code on the mobile phone.
Depending on the mobile phone used, con-
firm the connection to the multimedia system
and for the PBAP and MAP Bluetooth ®
pro-
files. The prompt to confirm may take up to
two minutes to be displayed (see the manu-
facturer's operating instructions).
X If the codes are different: selectNo Noon the
multimedia system.
The process is cancelled.
Repeat authorisation.
Authorisation by entering a passkey (passcode): X Select the Bluetooth ®
name of the mobile
phone.
The input menu for the passkey is displayed.
X Choose a one- to sixteen-digit number com-
bination as a passkey.
X Enter the passkey on the multimedia system.
X Press ¬to confirm.
X Enter and confirm the passkey on the mobile
phone. Depending on the mobile phone used,
confirm the connection to the multimedia sys-
tem and for the PBAP and MAP Bluetooth ®
profiles. The prompt to confirm may take up
to two minutes to be displayed (see the man- ufacturer's operating instructions).
i Mobile phones that are connected to the
optionally available telephone module with
Bluetooth ®
(SAP profile) are displayed sepa- Operating system
291Multimedia system Z

Stowage areas
Loading guidelines
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the boot
lid is open when the engine is running, espe-
cially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the boot lid. Never drive with the boot 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, especially when braking or abruptly changing directions.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey. 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
note the following when transporting a load:
R never exceed the maximum gross vehicle
weight or the permissible axle loads for the
vehicle (including occupants).
R the boot is the preferred place to store
objects.
R position heavy loads as far forwards as pos-
sible and as low down in the boot as possible. R
the load must not protrude above the upper
edge of the seat backrests.
R always place the load behind unoccupied
seats if possible.
R secure the load with sufficiently strong and
wear-resistant lashing material. pad sharp
edges for protection.
i Lashing material is available at any qualified
specialist workshop. Stowage compartments
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 boot.
Read the loading guidelines (Y page 296).296
Stowage areasStowing and features

Folding the rear seat backrest forwards
X
Vehicles without memory function: if neces-
sary, move the driver's or front-passenger
seat forwards.
X Vehicles with memory function: when one or
both parts of the rear seat backrest are folded forwards, the respective front seat moves
forward slightly, when necessary, in order to
avoid contact.
X Open the boot. X
Press the right or left button :on the rear
seat backrest.
The corresponding rear seat backrest is
released. X
Fold corresponding rear seat backrest ;for-
wards.
X Move the driver's or front-passenger seat
back if necessary.
Folding the rear seat backrest back !
Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, it could be dam-
aged. Left- and right-hand seat backrest
X Move the driver's or front-passenger seat for-
wards if necessary.
X Fold rear seat backrest :back until it
engages.
If the rear seat backrest is not engaged and
locked, this will be shown on the multifunc-
tion display on the instrument cluster. A warn- ing tone also sounds.
If you do not need the through-loading feature,
you should always engage the rear seat backr-
ests. This will prevent unauthorised access to
the boot from the vehicle interior. Securing a load
Lashing eyelets Observe the following notes on securing loads:
R Observe the loading guidelines (Y page 296).
R Secure the load using the lashing eyelets.
R Distribute the load on the lashing eyelets
evenly.
R Do not use elastic straps or nets to secure a
load. These are intended only as anti-slip pro-
tection for light loads.
R Do not route lashing materials across sharp
edges or corners.
R Pad sharp edges for protection. Stowage areas
299Stowing and featu res Z

X
Fold up the lashing eyelets next to the rear
seat backrest and put them through the slots
in the carpet. Luggage net
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 boot.
Observe the following notes: R Observe the loading guidelines (Y page 296).Attaching the luggage net
X
Fold up the lashing eyelets next to the rear
seat backrest and put them through the slots
in the carpet.
X Attach the luggage net :to the front and
rear lashing eyelets. Stowage well under the boot floor
The following items are located beneath the lug-
gage compartment floor:
R The folding box
R The vehicle tool kit
R The TIREFIT
! Remove the handle again before closing the
boot lid and snap it in tightly to prevent the
handle flap from protruding. Otherwise, you
could damage the handle. X
To open: pull handle :up. 300
Stowage areasStowing and features