engine coolant MERCEDES-BENZ E-Class CABRIOLET 2017 A207 Owner's Manual

Changing bulbsHigh-beam headlamps .................. .114
Child
Restraint system .............................. 58
Child seat
Forward-facing restraint system ...... 60
LATCH-type (ISOFIX) child seat
anchors ............................................ 59
On the front-passenger seat ............ 59
Rearward-facing restraint system .... 60
Child-proof locks
Important safety notes .................... 60
Children
Special seat belt retractor ............... 57
Cigarette lighter ................................ 245
Cleaning
Mirror turn signal ........................... 266
Climate control
Automatic climate control (3-
zone) .............................................. 119
Controlling automatically ............... 121
Cooling with air dehumidification .. 121
Defrosting the windows ................. 124
Defrosting the windshield .............. 123
Dual-zone automatic climate con-
trol ................................................. 118
General notes ................................ 117
Indicator lamp ................................ 121
Information about using auto-
matic climate control ..................... 120
Maximum cooling .......................... 123
Overview of systems ...................... 117
Problem with the rear window
defroster ........................................ 125
Problems with cooling with air
dehumidification ............................ 121
Rear control panel ......................... 119
Refrigerant ..................................... 317
Refrigerant filling capacity ............. 317
Setting the air distribution ............. 122
Setting the air vents ...................... 126
Setting the airflow ......................... 123
Setting the climate mode ............... 122
Setting the temperature ................ 122
Setting the temperature with 3-
zone automatic climate control ..... 122
Setting the temperature with dual-
zone automatic climate control ..... 122 Switching air-recirculation mode
on/off ............................................ 125
Switching on/off ........................... 120
Switching residual hea
t o
n/off ...... 125
Switching the rear window
defroster on/off ............................ 124
Switching the ZONE function on/
off .................................................. 123
Cockpit
Overview .......................................... 32
see Instrument cluster
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 197
Display message ............................ 205
Operation/notes .............................. 64
COMAND
Switching on/off ........................... 235
COMAND display
Cleaning ......................................... 268
Combination switch .......................... 110
Connecting a USB device
see also Digital Operator's Man-
ual .................................................. 234
Consumption statistics (on-board
computer) .......................................... 192
Controller ........................................... 235
Coolant (engine)
Checking the level ......................... 259
Display message ............................ 212
Filling capacity ............................... 316
Important safety notes .................. 316
Temperature gauge ........................ 189
Warning lamp ................................. 230
Cooling
see Climate control
Copyright ............................................. 31
Cornering light function
Display message ............................ 211
Function/notes ............................. 111
Cruise control
Activation conditions ..................... 151
Cruise control lever ....................... 151
Deactivating ................................... 152
Display message ............................ 218
Driving system ............................... 151
Function/notes ............................. 151
Important safety notes .................. 151
6Index

Seat beltsAdjusting the driver's and front-
passenger seat belt .........................4 5
Automatic comfort-fit feature .......... 44
Cleaning ......................................... 269
Correct usage .................................. 43
Fastening ......................................... 43
Important safety guidelines ............. 42
Introduction ..................................... 41
Releasing ......................................... 44
Switching belt adjustment on/off
(on-board computer) ...................... 201
Warning lamp ................................. 225
Warning lamp (function) ................... 45
Seats
Adjusting (electrically) ..................... 97
Adjusting the 4-way lumbar sup-
port ................................................ 100
Adjusting the head restraint ............ 98
Adjusting the multicontour seat ..... 100
Cleaning the cover ......................... 268
Correct driver's seat position ........... 96
Folding the backrests forward/
back ................................................. 99
Important safety notes .................... 96
Overview .......................................... 96
Seat backrest display message ..... 222
Seat heating .................................. 100
Seat heating problem .................... 102
Storing settings (memory func-
tion) ............................................... 108
Switching AIRSCARF on/off .......... 102
Switching seat heating on/off ....... 100
Switching seat ventilation on/
off .................................................. 101
Section
Trunk ............................................... 80
Securing cargo .................................. 242
Selector lever
Cleaning ......................................... 268
Sensors (cleaning instructions) ....... 267
Service menu (on-board com-
puter) .................................................. 198
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 315
Coolant (engine) ............................ 316 Engine oil ....................................... 315
Fuel ................................................ 313
Important safety notes .................. 312
Refrigerant (air-conditioning sys-
tem) ............................................... 317
Washer fluid ................................... 316
Setting the air distribution ............... 122
Setting the airflow ............................ 123
Setting the date
/time format
see also Digital Operator's Man-
ual .................................................. 234
Setting the language
see also Digital Operator's Man-
ual .................................................. 234
Setting the time
see also Digital Operator's Man-
ual .................................................. 234
Settings
Factory (on-board computer) ......... 201
On-board computer ....................... 198
Side impact air bag ............................. 47
Side marker lamp (display mes-
sage) ................................................... 211
Side windows
Cleaning ......................................... 266
Important safety information ........... 82
Opening/closing .............................. 83
Opening/closing (all) ....................... 83
Problem (malfunction) ..................... 85
Resetting ......................................... 84
Reversing feature ............................. 82
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 234
SmartKey
Changing the battery ....................... 76
Changing the programming ............. 74
Checking the battery ....................... 76
Display message ............................ 223
Door central locking/unlocking ....... 73
Important safety notes .................... 73
Loss ................................................. 77
Mechanical key ................................ 75
Opening/closing soft top ................. 87
Overview .......................................... 73
Positions (ignition lock) ................. 128
Problem (malfunction) ..................... 77
Starting the engine ........................ 130
16Index

U
UnlockingEmergency unlocking ...................... .80
From inside the vehicle (central
unlocking button) ............................. 79
USB devices
Connecting to the Media Inter-
face ............................................... 239
V
Vanity mirror (in the sun visor) ........ 244
Vehicle
Correct use ...................................... 28
Data acquisition ............................... 29
Display message ............................ 220
Equipment ....................................... 25
Individual settings .......................... 198
Limited Warranty ............................. 29
Loading .......................................... 294
Locking (in an emergency) ............... 80
Locking (SmartKey) .......................... 73
Lowering ........................................ 307
Maintenance .................................... 26
Parking for a long period ................ 146
Pulling away ................................... 130
Raising ........................................... 305
Reporting problems ......................... 28
Securing from rolling away ............ 304
Towing away .................................. 280
Transporting .................................. 282
Unlocking (in an emergency) ........... 80
Unlocking (SmartKey) ...................... 73
Vehicle data ................................... 317
Vehicle data ....................................... 317
Vehicle dimensions ........................... 317
Vehicle emergency locking ................ 80
Vehicle identification number
see VIN
Vehicle identification plate .............. 311
Vehicle tool kit .................................. 270
Video
Operating the DVD ......................... 194
see also Digital Operator's Man-
ual .................................................. 234
VIN
Seat ............................................... 312 Type plate ...................................... 311
Voice Control System
see Separate operating instructions
W
Warning and indicator lampsABS ................................................ 227
Brakes ........................................... 226
Check Engine ................................. 230
Coolant .......................................... 230
Distance warning ........................... 232
ESP
®.............................................. 227
ESP®OFF ....................................... 228
Fuel tank ........................................ 230
General notes ................................ 224
Overview .......................................... 33
PASSENGER AIR BAG OFF ............... 41
Reserve fuel ................................... 230
Restraint system ............................ 229
Seat belt ........................................ 225
Tire pressure monitor .................... 233
Warranty .............................................. 25
Washer fluid
Display message ............................ 223
Wheel and tire combinations
Tires ............................................... 307
Wheel bolt tightening torque ........... 307
Wheel chock ...................................... 304
Wheels
Changing a wheel .......................... 303
Checking ........................................ 285
Cleaning ......................................... 265
Emergency spare wheel ................. 308
Important safety notes .................. 285
Information on driving .................... 285
Interchanging/changing ................ 303
Mounting a new wheel ................... 306
Mounting a wheel .......................... 304
Removing a wheel .......................... 306
Storing ........................................... 304
Tightening torque ........................... 307
Wheel size/tire size ....................... 307
Wind deflector (cleaning instruc-
tions) .................................................. 265
Wind screen ......................................... 91
Wind screen (cleaning instruc-
tions) .................................................. 265
20Index

Problems with the engine
ProblemPossible causes/consequences andMSolutions
The engine does not
start. The starter motor
can be heard.RThere is a malfunction in the engine electronics.
RThere is a malfunction in the fuel supply.
Before attempting to start the engine again:
XTurn the Smartkey back to position 0in the ignition lock.
or
XPress the Start/Stop button repeatedly until all indicator lamps in
the instrument cluster go out.
XTry to start the engine again (Ypage 129). Avoid excessively long
and frequent attempts to start the engine as these will drain the
battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.
The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak or
discharged.
XJump-start the vehicle (Ypage 278).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
XAllow the starter motor to cool down for approximately two minutes.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
XHave the cause rectified immediately at a qualified specialist work-
shop.
The coolant temperature
gauge shows a value
above 248 ‡ (120 †).The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 259). Observe the warning notes
as you do so and add coolant if necessary.
Driving133
Driving and parking
Z

Important safety notes
GWARNING
If you operate information systems and com-
munication equipmen tintegrate din th evehi-
cle while driving ,you will be distracte dfrom
traffic conditions. You could also lose control
of th evehicle. Ther eis aris kof an accident.
Only operate th eequipmen twhen th etraffic
situation permits. If you are no tsur ethat this
is possible ,park th evehicl epayin gattention
to traffic condition sand operate th eequip-
men twhen th evehicl eis stationary.
You must observ eth elegal requirements for th e
country in whic hyou are currentl ydriving when
operating th eon-board computer.
GWARNIN G
If th einstrumen tcluste rhas faile dor mal-
functioned, you may no trecognize function
restriction sin systems relevan tto safety. The
operating safet yof your vehicl emay be
impaired .Ther eis aris kof an accident.
Drive on carefully. Hav eth evehicl echecke d
at aqualified specialist workshop immedi-
ately.
The on-board computer only shows message sor
warning sfrom certain systems in th emultifunc-
tion display. You should therefor emak esur e
your vehicl eis operating safely at all times .
If th eoperating safet yof your vehicl eis
impaired ,pull ove ras soo nas it is saf eto do so.
Contac t aqualified specialist workshop.
Fo ran overview, see th einstrumen tpanel illus-
tration (
Ypage 33).
Displays and operation
Speedometer with segments
The segments in th espeedometer indicat e
whic hspee drange is available.
RCruis econtrol activated (Ypage 151):
The segments ligh tup from th estore dspee d
to th etype-tested maximum speed.
RDISTRONI CPLU Sactivated (Ypage 153): On
eor two segments in th eset spee drange
ligh tup.
RDISTRONI CPLU Sdetects avehicl ein front:
The segments between th espee dof th evehi-
cle in fron tand th estore dspee dligh tup.
Tachometer
!
Do no tdriv ein th eoverrevving range, as this
could damag eth eengine.
The red ban din th etachometer indicates th e
engine's overrevving range.
The fuel suppl yis interrupted to protect th e
engin ewhen th ered ban dis reached.
Outside temperature display
You should pay special attention to road condi-
tion swhen temperatures are aroun dfreezing
point.
Bea rin min dthat th eoutside temperature dis-
play indicates th etemperature measured and
does no trecord th eroad temperature.
The outside temperature display is in th emulti-
function display (
Ypage 191).
The multifunction display shows changes in th e
outside temperature wit h adelay.
Coolant temperature display
GWARNIN G
Opening th ehoo dwhen th eengin eis over-
heated or when there is afir ein th eengin e
compartmen tcould expos eyou to hot gase s
or other servic eproducts .Ther eis aris kof
injury.
Let an overheate dengin ecool down before
opening th ehood. If there is afir ein th e
engin ecompartment, keep th ehoo dclosed
and contact th efir edepartment.
!A display message is shown if th ecoolan t
temperature is to ohigh .
If th ecoolan ttemperature is ove r24 8 ‡
(12 0†), do no tcontinue driving .The engin e
will otherwise be damaged.
The coolan ttemperature gauge is in th einstru-
men tcluste ron th eleft-han dside (
Ypage 33).
Displays and operation189
On-board computer and displays
Z

Engine
Display messagesPossible causes/consequences andMSolutions
+
CheckCoolantLevelSee Operator's Man‐ual
The coolant level is too low.
!Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
XAdd coolant, observing the warning notes before doing so
(Ypage 259).
XIf you need to add coolant more often than usual, have the engine
coolant system checked at a qualified specialist workshop.
?The fan motor is faulty.
XAt coolant temperatures below 248 ‡(120 †), drive to the nearest
qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic.
?
Coolant Too HotStop Vehicle TurnEngine Off
The coolant is too hot.
A warning tone also sounds.
GWARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to catch
fire.
Steam from the overheated engine can also cause serious burns which
can occur just by opening the hood.
There is a risk of injury.
XPull over and stop the vehicle safely and switch off the engine, pay- ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 144).
XWait until the engine has cooled down.
XMake sure that the air supply to the engine radiator is not blocked,e.g. by snow, slush or ice.
XDo not start the engine again until the display message goes out and
the coolant temperature is below 248 ‡ (120 †). Otherwise, the
engine could be damaged.
XPay attention to the coolant temperature display.
XIf the temperature increases again, visit a qualified specialist work-
shop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †).
212Display messages
On-board computer and displays

Engine
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
;NThe yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignition system
Rin the fuel system
The emission limit values may be exceeded and the engine may be in emergency
mode.
XVisit a qualified specialist workshop immediately.
iIn some states, you must immediately visit a qualified specialist workshop as
soon as the yellow Check Engine warning lamp lights up. This is due to the legal
requirements in effect in these states. If in doubt, check whether such legal
regulations apply in the state in which you are currently driving.
8N The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
8N The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the ;Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler cap.
XIf the fuel filler cap is closed:visit a qualified specialist workshop.
?NThe red coolant warning lamp lights up while the engine is running and the
coolant temperature gage is at the start of the scale.
The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 144).
XConsult a qualified specialist workshop.
230Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
?NThe 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.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 144).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 259).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in mountainous terrain,
and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running. A warning
tone also sounds.
The coolant temperature has exceeded 248 ‡(120 †). The airflow to the engine
radiator may be blocked or the coolant level may be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur
just by opening the hood.
There is a risk of injury.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 144).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 259).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
Warning and indicator lamps in the instrument cluster231
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
XAt coolant temperatures below 248 ‡ (120 †), drive to the nearest qualified
specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in mountainous terrain,
and stop-and-go traffic.
Driving systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicle is in motion. A warning
tone also sounds.
You are approaching a vehicle, a pedestrian or a stationary obstacle in your line of travel at too high a speed.
XBe prepared to brake immediately.
XPay careful attention to the traffic situation. You may have to brake or take
evasive action.
Observe the additional information on PRE‑SAFE
®Brake (Ypage 69).
Observe the additional information on the distance warning function of COLLISION PREVENTION ASSIST PLUS (
Ypage 64).
232Warning and indicator lamps in the instrument cluster
On-board computer and displays

Adding engine oil
GWARNING
Certain component sin th eengin ecompart-
ment, suc has th eengine, radiato rand part s
of th eexhaust system, can become ver yhot .
Working in th eengin ecompartmen tposes a
ris kof injury.
Wher epossible, let th eengin ecool down and
touch only th ecomponent sdescribed in th e
following.
GWARNIN G
If engin eoil comes int ocontact wit hhot com-
ponents in th eengin ecompartment, it may
ignite. There is aris kof fir eand injury.
Mak esur ethat engin eoil is no tspilled next to
th efiller neck .Let th eengin ecool down and
thoroughly clean th eengin eoil off th ecom-
ponents before starting th eengine.
HEnvironmenta lnot e
When addin goil, tak ecar eno tto spil lany. If
oil enters th esoil or waterways, it is harmful to
th eenvironment.
!Only use engin eoils and oil filters that hav e
been approve dfor vehicles wit h aservic esys-
tem. You can obtain alist of th eengin eoils
and oil filters tested and approve din accord -
anc ewit hth eMercedes-Benz Specification s
for Service Products at any Mercedes-Benz
Service center.
Damage to th eengin eor exhaust system is
caused by th efollowing:
Rusin gengin eoils and oil filters that hav eno t
been specifically approve dfor th eservic e
system
Rreplacing engin eoil and oil filters after th e
interval for replacemen tspecifie dby th e
servic esystem has been exceeded
Rusin gengin eoil additives.
!Do no tadd to omuc hoil. addin gto omuc h
engin eoil can result in damag eto th eengin e
or to th ecatalytic converter. Hav eexcess
engin eoil siphoned off .
Example
XTurn cap :counter-clockwise and remove it .
XAddengin eoil.
If th eoil level is at or belo wtheMIN mar kon
th eoil dipstick ,add 1. 1US qt (1.0l)of engine
oil.
XReplace cap :on the filler neck and turn
clockwise.
Ensure that the cap locks into place securely.
XCheck the oil level again with the oil dipstick
(Ypage 258).
Further information on engine oil (
Ypage 315).
Additional service products
Checking coolant level
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
Engine compartment259
Maintenance and care
Z