2018 MERCEDES-BENZ C-CLASS CABRIOLET ignition

Selecting displays .......................... 206
Setting the position ....................... 206
Storing settings (memory func-
tion) ............................................... 106
Switching on or off ......................... 195
Headlamps
Display message ............................ 224
Fogging up ..................................... 110
see Automatic headlamp mode
Heating
see Climate control
High beam flasher ............................. 108
High-beam headlamps
Adaptive Highbeam Assist ............. 109
Display message ............................ 224
Switching on/off ........................... 108
Hill start assist .................................. 127
HOLD function
Activating ....................................... 162
Activation conditions ..................... 161
Deactivating ................................... 162
Display message ............................ 231
Function/notes ............................. 161
General notes ................................ 161
Home address
see also Digital Operator's Man-
ual .................................................. 253
Hood
Closing ........................................... 282
Display message ............................ 238
Important safety notes .................. 281
Opening ......................................... 281
Horn ...................................................... 35
HUD
see Head-up display
Hydroplaning ..................................... 150
I
Ignition key
see SmartKey
Ignition lock
see Key positions
Immobilizer .......................................... 74
Indicator lamps
see Warning and indicator lamps
Indicators
see Turn signals Insect protection on the radiator
.... 282
Inspection
see ASSYST PLUS
Instrument cluster
Overview .......................................... 36
Warning and indicator lamps ........... 36
Instrument cluster lighting .............. 192
Interior lighting
Automatic control .......................... 111
Control ........................................... 111
Overview ........................................ 110
Reading lamp ................................. 110
iPod
®
see also Digital Operator's Man-
ual .................................................. 253
J
Jack Using ............................................. 333
Jump starting (engine) ...................... 304
K
Key positions
SmartKey ....................................... 123
Start/Stop button .......................... 124
KEYLESS-GO
Activating ......................................... 77
Deactivation ..................................... 77
Locking ............................................ 77
Removing the Start/Stop button ... 124
Start function ................................... 77
Unlocking ......................................... 77
Kickdown
Driving tips .................................... 136
Manual gearshifting ....................... 141
Knee bag .............................................. 50
L
Lamps
see Warning and indicator lamps
Lane Change Assist
see Active Blind Spot Assist
Lane detection (automatic)
see Lane Keeping Assist
Lane Keeping Assist
Activating/deactivating ................. 185
Index13

Adjusting the 4-way lumbar sup-
port .................................................. 98
Adjusting the head restraint ............ 96
Calling up a stored setting (mem-
ory function) .................................. 106
Cleaning the cover ......................... 294
Folding the backrest (rear com-
partment) forwards/back .............. 265
Folding the backrests forward/
back ................................................. 97
Important safety notes .................... 94
Seat backrest display message ..... 238
Seat heating .................................... 99
Seat heating problem .................... 100
Seat ventilation ................................ 99
Seat ventilation problem ................ 100
Storing settings (memory func-
tion) ............................................... 106
Switching AIRSCARF on/off .......... 100
Securing a load
see Securing cargo
Securing cargo .................................. 266
Selecting a gear
see Automatic transmission
Selector lever
Cleaning ......................................... 293
see Automatic transmission
Sensors (cleaning instructions) ....... 292
Service center
see Qualified specialist workshop
Service Center
see Qualified specialist workshop
Service menu (on-board com-
puter) .................................................. 203
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 343
Coolant (engine) ............................ 343
Engine oil ....................................... 342
Fuel ................................................ 340
Important safety notes .................. 340
Refrigerant (air-conditioning sys-
tem) ............................................... 344
Washer fluid ................................... 344
Setting the date/time format
see also Digital Operator's Man-
ual .................................................. 253 Setting the language
see also Digital Operator's Man-
ual .................................................. 253
Setting the time
see also Digital Operator's Man-
ual .................................................. 253
Se

ttings
Factory (on-board computer) ......... 207
On-board computer ....................... 203
SETUP (on-board computer,
Mercedes-AMG vehicles) .................. 209
Side impact air bag ............................. 50
Side marker lamp (display mes-
sage) ................................................... 224
Side windows
Cleaning ......................................... 291
Important safety information ........... 85
Opening/closing .............................. 86
Opening/closing (all) ....................... 86
Problem (malfunction) ..................... 87
Resetting ......................................... 87
Reversing feature ............................. 85
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 253
SmartKey
Changing the battery ....................... 79
Changing the programming ............. 78
Checking the battery ....................... 79
Display message ............................ 240
Door central locking/unlocking ....... 76
Important safety notes .................... 76
KEYLESS-GO start function .............. 77
Loss ................................................. 80
Mechanical key ................................ 78
Opening/closing soft top ................. 90
Overview .......................................... 76
Positions (ignition lock) ................. 123
Problem (malfunction) ..................... 80
Starting the engine ........................ 125
Smartphone
Starting the engine ........................ 126
SMS
see also Digital Operator's Man-
ual .................................................. 253
Snow chains ...................................... 315
Socket (12 V)
Center console .............................. 270
Index19

Cockpit
FunctionPage
:Steering wheel paddle shift-
ers138
;Combination switch108
=Horn
?Instrument cluster36
ADIRECT SELECT lever133
BClimate control systems115
COverhead control panel41
DControl panel for multimedia
system and vehicle functions38
EIgnition lock123
Start/Stop button124
FAdjusts the steering wheel100
GCruise control lever152
HElectric parking brake145
FunctionPage
IDiagnostics connection31
JOpens the hood281
KLight switch107
LControl panel for:
YActivating Distance
Pilot DISTRONIC with Steer-
ing Pilot
159
Ç Switching on Active
Lane Keeping Assist189
c Deactivating Parking
Assist PARKTRONIC172
Ô Switching on the 360°
camera176
Switching on the head-up
display195
Vehicles without a driver
assistance system: map/
coin holder
Cockpit35
At a glance

Panic alarm
XTo arm:press and hold !button :for
approximately one second.
A visual and audible alarm is triggered if the
alarm system is armed.
XTo disarm: press!button :again.
or
XInsert the SmartKey into the ignition lock.
or
XVehicles with KEYLESS-GO start function
or KEYLESS-GO: press the Start/Stop but-
ton.
The SmartKey must be in the vehicle.
Occupant safety
Introduction to the restraint system
The restraint system can reduce 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:
RSeat belt system
RAir bags
RChild restraint system
RChild 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:
Rhave fastened their seat belts correctly
(Ypage 46)
Rhave the seat and head restraint adjusted
properly (Ypage 94) As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position (
Ypage 94).
You also have to make sure that an air bag can
inflate properly if deployed (
Ypage 49).
An air bag supplements a correctly worn seat
belt. As an additional safety device, the air bag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if, in the event of an accident, the protection
offered by the seat belt is sufficient, the air bags
are not deployed. When an accident occurs, only
the air bags that increase protection in that par- ticular accident situation are deployed. How-
ever, seat belts and air bags generally do not
protect against objects penetrating the vehicle
from the outside.
Information on restraint system operation can
be found under "Triggering of the Emergency
Tensioning Devices and air bags" (
Ypage 56).
See "Children in the vehicle" for information on
children traveling with you in the vehicle as well
as on child restraint systems (
Ypage 59).
Important safety notes
GWARNING
Modifications to the restraint system may
cause it to no longer work as intended. The
restraint system may then not perform its
intended protective function and may fail in an
accident or trigger unexpectedly, for example.
This poses an increased risk of injury or even fatal injury.
Never modify parts of the restraint system.
Never tamper with the wiring, the electronic
components or their software.
If it is necessary to modify components of the
restraint system to accommodate a person with
disabilities, contact an authorized Mercedes-
Benz Center for details. USA only: for further
information contact our Customer Assistance
Center at 1-800-FOR-MERCedes
(1‑800‑367‑6372).
Mercedes-Benz recommends that you only use
driving aids which have been approved specifi-
cally for your vehicle by Mercedes-Benz.
Occupant safety43
Safety
Z

Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at
regular intervals while the engine is running.
Therefore, malfunctions can be detected in
good time.
The6 restraint system warning lamp on the
instrument cluster lights up when the ignition is
switched on. It goes out no later than a few sec-
onds after the vehicle is started. The compo-
nents of the restraint system are in operational
readiness.
A malfunction has occurred if the 6restraint
system warning lamp:
Rdoes not light up after the ignition is switched
on
Rdoes not go out after a few seconds with the
engine running
Rlights up again while the engine is running
GWARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or may not deploy as
intended during an accident. This can affect
for example the Emergency Tensioning
Device or the air bag. This poses an increased
risk of injury or even fatal injury.
Have the restraint system checked and
repaired in a qualified specialist workshop as
soon as possible.
PASSENGER AIR BAG indicator lamp
PASSENGER AIR BAG ON indicator lamp :and
PASSENGER AIR BAG OFF indicator lamp ;are
part of the Occupant Classification System
(OCS). The indicator lamps display the status of the
front-passenger front air bag.
RPASSENGER AIR BAG ON lights up for 60 sec-
onds, subsequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF): the
front-passenger front air bag is able to deploy
in the event of an accident.
RPASSENGER AIR BAG OFF lights up: the front-
passenger front air bag is deactivated. It will
then not be deployed in the event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator lamp shows the status of the front-passenger
front air bag. The PASSENGER AIR BAG OFF
indicator lamp may be lit continuously or be off.
Depending on the person in the front-passenger
seat, the front-passenger front air bag must
either be deactivated or enabled; see the fol-
lowing points. You must make sure of this both
before and during a journey.
RChildren in a child restraint system:
whether the front-passenger front air bag is
enabled or deactivated depends on the instal-led child restraint system, and the age and
size of the child. Therefore, be sure to observe
the notes on the "Occupant Classification
System (OCS)" (
Ypage 51) and on "Chil-
dren in the vehicle" (Ypage 59). There you
will also find instructions on rearward and
forward-facing child restraint systems on the
front-passenger seat.
RAll other persons: depending on the classi-
fication of the person in the front-passenger
seat, the front-passenger front air bag is ena-
bled or deactivated (
Ypage 51). Be sure to
observe the notes on "Seat
belts“ (
Ypage 44) and "Air bags"
(Ypage 48). There you can also find infor-
mation on the correct seat position.
Seat belts
Introduction
Seat belts are the most effective means of
restricting the movement of vehicle occupants
in the event of an accident or the vehicle rolling over. This reduces the risk of vehicle occupants
coming into contact with parts of the vehicle
interior or being ejected from the vehicle. Fur-
thermore, the seat belt helps to keep the vehicle
44Occupant safety
Safety

of an accident, they could be crushed
between the vehicle occupant and seat belt.
Robjects are never secured with a seat belt if
the seat belt is also being used by one of the
vehicle's occupants
Also ensure that there are never objects
between a person and the seat, e.g. cushions.
Seat belts are only intended to secure and
restrain vehicle occupants. Always observe the
"Loading guidelines" for securing objects, lug-
gage or loads (
Ypage 263).
Fastening seat belts
Observe the safety notes on the seat belt
(Ypage 45) and the notes on correct use of seat
belts (Ypage 46).
GWARNING
If the seat-belt extender is extended during
the journey, the seat belt is not fitted properly
on the body. The seat belt can then no longer
perform its intended protective function. This
poses an increased risk of injury or even fatal
injury.
Always make sure that the seat-belt extender is retracted during a journey.
If the seat-belt extender does not retract auto-
matically, you can return it manually. Press the
seat-belt extender back to the stop before start-
ing the vehicle to do so. Returning the seat-belt
extender requires force.
The seat-belt extender for the driver and front
passenger helps you fasten your seat belt. Seat-
belt extender =is extended when the respec-
tive door is closed.
You can also extend seat-belt extender =with
seat-belt extender button ?.
XTurn the SmartKey to position 1or2 in the
ignition lock.
XPress seat-belt extender button ?.
Seat-belt extender =extends.
Seat-belt extender =is retracted again if:
Rthe belt tongue is engaged in the seat belt
buckle
Rthe belt tongue is not engaged in the seat belt
buckle within 60 seconds
In this case, you can extend seat-belt
extender =again. Press seat-belt extender
button ?again.
Rthe respective door is opened
Ryou release the seat backrest and fold it
forward
Rthe front-passenger seat remains unoccupied
If you then press seat-belt extender but-
ton ?, seat-belt extender =will not extend.
Basic illustration
Occupant safety47
Safety
Z

XAdjust the seat (Ypage 94).
The seat backrest must be in an almost
upright position.
XPull the seat belt smoothly out of seat-belt
extender =and engage belt tongue ;into
belt buckle :.
The seat belt on the driver’s seat and the
front-passenger seat may be tightened auto-
matically, see "Belt adjustment"
(
Ypage 48).
XIf necessary, pull up on the shoulder section
of the seat belt to tighten the belt across your
body.
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor to
securely fasten child restraint systems in the
vehicle. Further information can be found under
"Special seat belt retractor" (
Ypage 60).
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. Damaged seat belts
can no longer fulfill their protective function
and must be replaced. Visit a qualified spe-
cialist workshop.
XPress the release button in the belt buckle,
hold the belt tongue firmly and guide the belt
back.
Seat belt adjustment
The belt adjustment is a convenience function
integrated into PRE-SAFE®. With this function,
the driver's and front-passenger seat belts are
adjusted to the upper body of the vehicle occu-
pant.
The seat belt strap will slightly tighten if:
Rthe belt tongue is inserted into the buckle and
Rthe 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
grab hold of the seat belt.
You can switch the seat belt adjustment on and
off using the multimedia system. Information on
switching the seat belt adjustment on and off
can be found in the Digital Operating Instruc-
tions.
Belt warning for the driver and front
passenger
The 7 seat belt warning lamp in the instru-
ment cluster is a reminder that all vehicle occu-
pants must wear their seat belts. It may light up
continuously or flash. In addition, there may be
a warning tone.
Regardless of whether the driver's seat belt has
already been fastened, the 7seat belt warn-
ing lamp lights up for six seconds each time the
engine is started. If the doors are closed and the
driver's or front-passenger seat belt has not
been fastened, the 7seat belt warning lamp
lights up again after the six seconds. As soon as
the driver's and front-passenger seat belts are
fastened or a door is opened again, the 7
seat belt warning lamp goes out.
If the driver's seat belt is not fastened after the
engine is started, an additional warning tone will sound. The warning tone switches off after six
seconds or once the driver's seat belt is fas-
tened.
If the vehicle's speed exceeds 15 mph
(25 km/h) once and the driver's and front-
passenger seat belts are not fastened, a warning
tone sounds. A warning tone also sounds with
increasing intensity for 60 seconds or until the
driver or front passenger have fastened their
seat belts.
If the driver or front passenger unfasten their
seat be lts d
uring the journey, the seat belt warn-
ing is activated again.
Air bags
Introduction
The installation point of an air bag can be rec-
ognized by the AIRBAG marking.
An air bag complements the correctly fastened
seat belt. It is no substitute for the seat belt. The
air bag provides additional protection in appli-
cable accident situations.
Not all air bags are deployed in an accident. The
different air bag systems function independ-
ently from one another (
Ypage 56).
However, no system available today can com-
pletely eliminate injuries and fatalities.
It is also not possible to rule out a risk of injury
caused by an air bag due to the high speed at
which the air bag must be deployed.
48Occupant safety
Safety

cushion. Fully retract the seat cushion length.
The entire base of the child restraint system
must always rest on the seat cushion of the
front-passenger seat. The backrest of the
forward-facing child restraint system must lie as
flat as possible against the backrest of the front-
passenger seat.
The child restraint system must not touch the
roof or be subjected to a load by the head
restraint. Adjust the angle of the seat backrest
and the head restraint position accordingly.
Only then can OCS be guaranteed to function
correctly. Always observe the child restraint sys-
tem manufacturer's installation and operating
instructions.
Occupant Classification System opera-
tion (OCS)
:PASSENGER AIR BAG ON indicator lamp
;PASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether the
front-passenger front air bag is deactivated or
enabled.
XPress the Start/Stop button once or twice, or turn the SmartKey to position 1or2 in the
ignition lock.
The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamps must light up simul-
taneously for approximately six seconds.
The indicator lamps display the status of the
front-passenger front air bag.
RPASSENGER AIR BAG ON lights up for 60 sec-
onds, subsequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF): the
front-passenger front air bag is able to deploy
in the event of an accident.
RPASSENGER AIR BAG OFF lights up: the front-
passenger front air bag is deactivated. It will then not be deployed in the event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator lamp shows the status of the front-passenger
front air bag. The PASSENGER AIR BAG OFF
indicator lamp may be lit continuously or be off.
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 instrument clus-
ter (
Ypage 222). When the front-passenger
seat is occupied, always pay attention to the
PASSENGER AIR BAG OFF indicator lamp. Be
aware of the status of the front-passenger front air bag both before a
nd during the journey.
GWARNING
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:
Rthe 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
Rthe front-passenger seat has been moved
back as far back as possible.
Rthe 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.
GWARNING
If you secure a child in a rearward-facing child
restraint system on the front-passenger seat
and the PASSENGER AIR BAG OFF indicator
lamp is off, the front-passenger front air bag
may deploy in the event of an accident. The
52Occupant safety
Safety