cooling MERCEDES-BENZ C-CLASS CABRIOLET 2018 Owners Manual

Switch off
the A/C function only brief ly;ot her‐
wise, the windo wsmay mist up more quickl y.
Condensation may drip from the underside of
th eve hicle when cooling mode is active. This is
not a sign that there is a malfunction. Setting climate control
toautomatic mode In auto
matic mode, the set temp erature is con‐
trolled and maintained at a const ant levelby the
air suppl y. 0007
Press the 0058 button. 0007
Toswitch tomanual mode: pressthe 002D
or 008F button. Overview of
the air distribution settings The symbols on
the display indicate which vents
th e air flow is being directed thro ugh:
0061 def
rost ervents
009C centre and side air
vents
009B fo
ot we llve nts
009F centre, side and
foot we llve nts 0086
defros
ter and foot we llve nts
008F all
vents
0087 defros
ter,middle and side air vents
00A2 au
tomatic air distribution Ac
tivating/deactivating the climate control
syn chro nisation function via the control
panel The climate control can be operated centrally
using
the synchronisation function. The temp era‐
ture and air distribution setting forth e driver
side is adop ted automatically forth e front
passenger side. 0007
Press the 0015 button.
The synchronisation function is deactivated if
th e settings for one of theot her climate zones
are changed. Demisting
the windo ws Wi
ndo wsmis ted up on the inside 0007
Press the0058 button. 0007
Ifth e windo wscontinue tomist up: press the
0064 button.
Wi ndo wsmis ted up on the outside 0007
Switch on the windscreen wipers. 0007
Press the0058 button. Switching air-recirculation mode on/off
0007
Press the0072 button.
The interior air will be recirculated.
Air-reci rculation mode automatically swit ches to
fresh air mode af ter some time.
0009 If air-recirculation mode is switched on, the
windo wsmay mist up more quickl y.Switch
on ai r-re circulation mode only brie fly. 14 4
Climate cont rol

0007
Dep ress the brake pedal and start theve hicle
using thest art/ stop button.
Any fur ther starts with th e DigitalVehicle
Key
The key is not needed for any fur ther starts. 0007
Place the mobile phone or Digital Vehicle Key
st icke r in the mar ked space 1. 0007
Depress the brake pedal and start theve hicle
using thest art/ stop button.
The "Digital Vehicle Key" service can be deacti‐
va ted in Mercedes me connect at http://
www.mercedes.me. The function is then deacti‐
va ted in the mobile phone via an online connec‐
tion. If connection tothe Internet is not possible,
e.g. af terth e mobile phone or the Digital Vehicle
Ke yst icke r has been stolen, theke y function can
be deacti vated at a Mercedes-Benz service
centre.
St arting theve hicle in emer gency operation
mode
If th eve hicle does not start and thePlace the
key in the marked space See Owner's Manual
message appears in the multifunction displa y,yo
u can start theve hicle in emer gency operation
mode. 0007
Makesure that mar ked space 2is em pty. 0007
Remo vekey1 from theke yring. 0007
Place key1 in mar ked space 2onthe
symbol 3.
The vehicle will start af ter a short time. If
yo ure mo vekey1 from mar ked space 2
th e engine continues running. For fur ther
engine starts ho wever,ke y1 must be loca‐
te d in mar ked space 2on symbol 3during
th e entire journe y. 0007
Have theke y1 checked at a qualified spe‐
cialist workshop.
If th eve hicle does not star t: 0007
place key1 in mar ked space 2and lea ve
it th ere. 0007
Vehicles with manual transmission:
depress the clutch pedal. 0007
Depress the brake pedal and start theve hicle
using thest art/ stop button.
0009 You can also swit chon the po wer supp lyor
th e ignition with thest art/ stop button. St
arting theve hicle via Remo teOnline serv‐
ices Cooling or heating
theve hicle interior before
commencing your journey
0009 This function is not available in all countries. 15 0
Driving and pa rking

ENERGIZING comfort prog
ramme overview
Prog ramme overview Prog
rammes Function
Re fresh
Can maketargeted changes tothe interior climate torefresh vehicle occupants. Cooling air flow and ionisa‐
tion purify the air. The vehicle interior is illuminated with cool colours and the seats are ventilated.
Wa rmth
Can increase the comfort le vel of the occupants. The vehicle's panel, seat and steering wheel heater pro‐
duce a cosy warmth. The air is pu rified using ionisation and a pleasant fragrance is released. The vehicle
interior is illuminated with warm lighting.
Vi tality
Can countera ct fatigue in mono tonous driving situations. Fast-paced music and a vitalizing massa gepro‐
vide invigorating stimulation forth eve hicle occupants. The air is purified using ionisation and a pleasant
fragrance is released. The vehicle interior is illuminated in a stimulating hue and the seat is ventilated.
Pleasure Can promotea positive mood in the occupants. Moderately fastmusic is pla yed and a massage pro‐
gramme is activated. The air is purified using ionisation and a pleasant fragrance is released. The vehicle
interior is illuminated with amicable lighting.
We ll being
Can aidthe ph ysical and men talre laxation of occupants. A back massage combined with local warmthpro‐
vide relaxation. The air is purified using ionisation and a pleasant fragrance is released. The music pla yer
pla ysselections of calming music and theve hicle interior is illuminated with pleasant lighting.
Tr aining
Can counteractthe onset of muscle tension, limbs falling asleep or stre ss with targeted relaxation or stim‐
ulation exercises. The exercises are demon stra ted in short videos. The air is purified using ionisation and a
pleasant fragrance is released. The vehicle interior is illuminated with lighting appropriate totheex ercise. Multimedia sy
stem 299

Checking
the coolant le vel 000A
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. 0007
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. 000A
WARNING Danger of bu rns when open‐
ing the bonn et
If yo u open the engine bonn etwhen the
engine has overheated or during a fire inthe
engine compartment, you could come into
contact with hot gases or other escaping
operating fluids. 0007
Before opening the bonn et, allow the
engine tocool down. 0007
Intheeve nt of a fire inthe engine com‐
partment, keep the engine bonn et
closed and call thefire service. 000A
WARNING Risk of scalding from hot
coolant
The engine cooling sy stem is pressurised,
particularly when the engine is warm. If you
open the cap, you could be scalded byhot
coolant spr aying out. 0007
Let the engine cool down before open‐
ing the cap. 0007
When opening the cap, wear pr otective
gl ove s and saf etygl asses. 0007
Open the cap slowly torelease pres‐
sure. 0007
Park theve hicle on a le vel sur face. 0007
Check the coolant temp erature display in the
instrument clus ter.
The coolant temp erature must be below
70 °C. 0007
Slowly turn cap 1anti-clockwise torelie ve
ov erpressure. 394
Maintenance and care

This impairs
the braking ef fect. 0007
Have the brake fluid rene we d at the
specified inter vals. Ha
ve the brake fluid regularly replaced at a
qu alified specialist workshop.
Only use brake fluid appr ovedby Mercedes-Benz
according toMB-F reigabe or MB-Appr oval 33 1.0.
Yo u can obtain fur ther information on brake fluid
in thefo llowing places:
R inthe Mercedes-Benz Specifications for
Operating Fluids
- at http://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo App
R at a qualified specialist workshop Coolant
Note
s on coolant
Obser vethe no tes on operating fluids
(0013 page 458). 000A
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite. 0007
Allow the engine tocool down before
yo uto p up the antif reeze. 0007
Make sure that no antifreeze spills out
next tothefiller opening. 0007
Thoroughly clean the antif reeze from
component parts before starting the
ve hicle. 000E
NO
TEDama gecaused byincor rect cool‐
ant 0007
Only add coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction. Information on coolant is
available at thefo l‐
lowing locations:
R inthe Mercedes-Benz Specification for
Operating Fluids 310.1
- at http://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo app
R at a qualified specialist workshop 000E
NO
TEOverheating at high outside tem‐
peratures If an inapp
ropriate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐
te cted against overheating and cor rosion at
high outside temp eratures. 0007
Alw ays use coolant appr ovedby
Mercedes-Benz. 0007
Obser vethe instructions in the
Mercedes-Benz Specifications for Oper‐
ating Fluids 310.1. Ha
ve the coolant regularly replaced at a qualified
specialist workshop. 466
Tech nical da ta

The proportion of cor
rosion inhibitor/antifreeze
concentrate in the engine cooling sy stem should
be:
R a minimum of 50% (antifreeze pr otection
down toappr oximately -37 °C)
R a maximum of 55% (antifreeze pr otection
down to-45 °C) Note
s on windscreen washer fluid Obser
vethe no tes on operating fluids
(0013 page 458). 000A
WARNING ‑ Risk of fire and injury due to
windscreen washer concentrate
Wi ndsc reen washer concentrate is highly
fl ammable. It could ignite if it comes into
con tact wi thhot engine component parts or
th eex haust sy stem. 0007
Make sure that no windsc reen washer
concentrate spills out next tothefiller
opening. 000E
NO
TEDama getotheex terior lighting
due tounsuitable windsc reen washer
fl uid Uns
uitable windsc reen washer fluids may
damage the plastic sur face of theex terior
lighting. 0007
Only use windscreen washer fluids
which are also suitable for use on plas‐
tic sur faces, e.g. MB SummerFit or MB
Wi nterFit. 000E
NO
TEBlocked spr aynozzles caused by
mixing windscreen washer fluids 0007
Do not mix MB SummerFit and MB Win‐
te rFit with other windscreen washer flu‐
ids. Do not use distilled or de-ionised
water asthefill
le ve l sensor may be triggered er roneously.
Re commended windscreen washer fluid:
R Abo vefreezing point: e.g. MB SummerFit
R Below freezing point: e.g. MB WinterFit Fo
rth e cor rect mixing ratio, referto the informa‐
tion on the antif reeze conta iner.
Mix thewa sher fluid with the windscreen washer
fl uid all year round. Ve
hicle data Ve
hicle dimensions The heights speci
fied may vary as a result of the
fo llowing factors:
R tyres
R load
R condition of the suspension
R optional equipment Te
ch nical da ta467

We
ights and loads Please no
tethat forth e specified vehicle data:
R items of optional equipment increase the
unladen weight and reduce the pa yload.
R vehicle-specific weight information can be
fo und on theve hicle identification plate . Tr
ailer hitch Gene
ral no tes on the trailer hit ch Not all models can be used
for trailer operation
(0013 page243).
Modi fications tothe engine cooling sy stem may
be necessar y,depending on theve hicle model.
The retrofitting of a trailer hitch is only pe rmissi‐
ble if a towing capacity is specified in your vehi‐
cle documents.
Fu rther information can be obtained at a quali‐
fi ed specialist workshop. Mounting dimensions
1
Fastening points
2 Overhang dimension
3 Rear axle centre line The
overhang dimension and fastening points
are valid for a trailer hitch ins talled at thefa c‐
to ry. Model
2 2Over‐
hang dimen‐ sion
All model s1 149 mm Pe
rm issible towing capacity The
tongue weight is not included in theto wing
capacity.
Pe rm issible towing capacit y,braked (at a
minimum start-off gradeability of 8% from a
st andstill) Model
Perm issible towing
capacit y,braked
C 18 0, manual trans‐
mission 14
00 kg
All other models 1800 kg Te
ch nical da ta469

Display messages
Possible causes/consequences and 0050
0050Solutions
Top up AdBlue Perf.
reduced: XXX km/h No
start in XXX km
00C8
Top up AdBlue Perf.
reduced in XXX miles See
Owner's Manual *
The low AdBlue ®
leve l will lead tolimited per form ance af terth ere maining dis tance displ ayed has been driven. 0007
Top up AdBlue ®
immediately (0013 page 172). Tr
ansmission Display messages
Possible causes/consequences and 0050 0050Solutions
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission shifts toposition 005Cautomaticall y. 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. 0007
Switch the transmission toposition 005D. 0007
Consult a qualified specialist workshop.
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission is overheating. Pulling away may be temp orarily impaired or not possible. Display messages and
warning/indicator lamps 505

Importing (o
verview) .......................... .336
Information .......................................... 335
Making a call ....................................... 337
Na me form at ...................................... .336
Options ................................................ 337
St oring .................................................3 37
Controller Operating ............................................ 280
Con venience closing ................................. 87
Con venience opening ................................ 87
Coolant (engine) Check le vel .......................................... 394
No tes .................................................. 466
Cooling see Climate control
Co pyright .................................................... 31
Cornering light ........................................ .131
Cross Traf fic Alert .................................. .232
Crosswind Assist Function/no tes ................................... 188
Cruise control .......................................... 19 5
Ac tivating ............................................ .197 Buttons ................................................
197
Calling up a speed .............................. .197
Deactivating ......................................... 197
Fu nction .............................................. 19 5
Re quirements ...................................... 197
Selecting .............................................. 197
Setting a speed .................................... 197
St oring a speed .................................... 197
Sy stem limitations ...............................1 95
Cup holder Rear ben chseat ................................... 121
Cup holder in the centre console
In stalling/removing ............................ .120
ins talling/ removing (auto matic
transmission) ....................................... 12 0 D
Damage de tection (pa rked vehicle) .......182
Dashboard see Cockpit
Dashboard lighting see Instrument lighting
Data acquisition Vehicle .................................................. 29 Data import/export
................................ 293
Fu nction/no tes ................................... 293
Importing/exporting ........................... 294
Data storage
Electronic control units ........................ .29
Online services ...................................... 30
Ve hicle .................................................. 29
Date Setting the time and date automati‐
cally ..................................................... 288
Deactivating the alarm (A TA).................... 97
Deale rship
see Qualified speciali stwo rkshop
Declaration of conformity Electromagnetic compatibility ............... 25
Jack .......................................................25
TIREFIT kit ............................................. 26
Wi reless vehicle components ................25
Decorative foil (cleaning instructions)
.................................................................. .399
DeNO x agent
see AdBlue ® Index
549

,Re
placekey See Owner's Man‐
ual ........................................................ 516
00AF Replace key ................................ .515
00B6 Reser vefuel le vel........................ 500
0075Re stra int sys. malfunction Con‐
sult workshop ...................................... 484
Re versing not poss. Consult work‐
shop ....................................................5 06
Risk of vehicle rolling Driver door
open and transmission not in P ...........508
Ru n Flat Indicator inope rative .............. 514
003D See Owner's Manual ................... 495
Speed limit (winter tyres) XXX km/h ... 494
00CCSt eering malfunction Incre ased
ph ysical ef fort See Owner's Manual .... 520
00CCSt eering malfunction See Own‐
er's Manual ......................................... 508
00CCSt eering malfunction Stop
immediately See Owner's Manual ........519 St
op vehicle Lea veengine running
Wa itTransmission cooling ...................505
003DSt opvehicle Lea veengine run‐
ning ..................................................... 496
003DSt opvehicle See Owner's Man‐
ual .......................................................4 97
00CC Stop vehicle Vehicle too low ........ 490
çsuspended ..................................4 92
0049Switch off lights .......................... 524
0049Switch on headla mps.................. 524
To shift out of P or N,depress brake
and start engine .................................. 506
0059 Top lo wering ............................... 522
00C8To p upAdBlue Perf.re duced in
XXX miles See Owner's Manual ...........505
00C8 Top up AdBlue Perf.re duced:
XXX km/h Nostart in XXX km ............ 504
To p up coolant See Owner ’sManual ... 496
00B2To p upwasher fluid .................... .521 Tr
af fic Sign Assi stCamera view
re stricted See Owner's Manual ........... 489
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 488
Tr af fic Sign Assi stinope rative ............. 488
00CATr ailer coupling extending… .........516
Tr ansmission Malfunction Stop ........... 505
0024Tu rnon the ignition torelease
th e parking brake ................................ 473
0077 Tyre press. monitor cur rently
una vailable .......................................... .512
0077 Tyre press. monitor inoperative
No wheel sensors ................................ 512
0077 Tyre press. monitor inoperative ...512
Ty re pressure Check tyres ...................509
Ty re(s) ove rheated ...............................5 13
00CC Vehicle rising Please wait............ 486
00CCVe hiclerising ...............................4 89
0077Wa rning tyre defect .....................510
0077 Wheel sensor(s) missing ..............512 554
Index