2017 MERCEDES-BENZ S-Class CABRIOLET coolant temperature

Consumption statistics (on-board
computer).......................................... 192
Controller .......................................... .244
Convenience closing feature .............. 87
Convenience opening feature ............ 87
Coolant (engine)
Checking the level ......................... 276
Display message ............................ 217
Filling capacity ............................... 333
Important safety notes .................. 332
Temperature gauge ........................ 188
Warning lamp ................................. 238
Cooling
see Climate control
Copyright ............................................. 32
Cornering light function
Display message ............................ 216
Function/notes .............................1 09
Crosswind Assist ................................. 68
Cruise control
Calling up the speed last stored .... 149
Cruise control lever ....................... 149
Deactivating ................................... 150
Display message ............................ 225
Driving system ............................... 149
Function/notes .............................1 49
General notes ................................ 149
Important safety notes .................. 149
Setting a speed .............................. 150
Storing and maintaining current
speed ............................................. 149
Cup holder
Center console .............................. 258
Important safety notes .................. 258
Rear compartment ......................... 258
Customer Assistance Center
(CAC) ..................................................... 29
Customer Relations Department ....... 29
D
Data
see Technical data
Data carrier
Selecting ........................................ 195
Daytime running lamps
Display message ............................ 216
Function/notes .............................1 07Switching on/off (on-board com-
puter) ............................................. 202
Declarations of conformity ................. 28
Diagnostics connection ......................29
Digital Operator's Manua l
Help ................................................ .24
Introduction .....................................2 4
Digital speedomete r........................ .192
DIRECT SELECT lever
Automatic transmission ................. 131
Display
see Display messages
see Warning and indicator lamps
Display messages
ASSYST PLUS ................................ 277
Calling up (on-board computer) ..... 204
Driving systems .............................2 20
Engine ............................................ 217
General notes ................................ 204
Hiding (on-board computer) ........... 204
Introduction ................................... 204
Lights ............................................. 216
Safety systems .............................. 205
SmartKey ....................................... 231
Tires ............................................... 226
Vehicle ...........................................2 27
Distance recorder
see Odometer
see Trip odometer
Distance warning (warning lamp) .... 240
Distance warning function
Function/notes ................................ 64
DISTRONIC PLUS
Activating ....................................... 152
Activation conditions ..................... 152
Cruise control lever ....................... 152
Deactivating ................................... 155
Display message ............................ 224
Displays in the instrument cluster .. 155
Driving tips ....................................1 56
Driving with DISTRONIC PLUS ....... 153
Fu
nction/notes .............................1 50
Important safety notes .................. 151
Setting a speed .............................. 154
Setting the specified minimum
distance ......................................... 154
Stopping ........................................ 153
8Index

TelephoneAccepting a call (multifunction
steering wheel) .............................. 197
Authorizing a mobile phone (con-
necting) ......................................... 251
Connecting a mobile phone (gen-
eral information) ............................ 251
Display message ............................ 230
Introduction ................................... 196
Menu (on-board computer) ............ 196
Number from the phone book ........ 197
Redialing ........................................ 197
Rejecting/ending a call ................. 197
see also Digital Operator's Man-
ual .................................................. 243
Switching between mobile
phones ........................................... 252
Temperature
Coolant .......................................... 188
Engine oil (on-board computer,
Mercedes-AMG vehicles) ............... 203
Outside temperature ...................... 187
Setting (climate control) ................ 117
Transmission oil (on-board com-
puter, Mercedes-AMG vehicles) ..... 203
Through-loading feature ................... 257
Tire pressure
Calling up (on-board computer) ..... 308
Checking manually ........................ 308
Display message ............................ 226
Maximum ....................................... 307
Not reached (TIREFIT) .................... 291
Notes ............................................. 306
Reached (TIREFIT) .......................... 291
Recommended ............................... 305
Using the TIREFIT kit ...................... 290
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 309
Function/notes ............................. 308
General notes ................................ 308
Important safety notes .................. 308
Radio type approval for the tire
pressure monitor ........................... 311
Restarting ...................................... 310
Warning lamp ................................. 241
Warning message .......................... 310 TIREFIT kit
Important safety notes .................. 289
Storage location ............................ 288
Tire pressure not reached .............. 291
Tire pre ssure re
ached .................... 291
Using ............................................. 290
Tires
Aspect ratio (definition) ................. 319
Average weight of the vehicle
occupants (definition) .................... 318
Bar (definition) ............................... 318
Changing a wheel .......................... 320
Characteristics .............................. 318
Checking ........................................ 302
Curb weight (definition) ................. 319
Definition of terms ......................... 318
Direction of rotation ...................... 321
Display message ............................ 226
Distribution of the vehicle occu-
pants (definition) ............................ 320
DOT (Department of Transporta-
tion) (definition) ............................. 318
DOT, Tire Identification Number
(TIN) ............................................... 318
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 319
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 319
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 319
Important safety notes .................. 302
Increased vehicle weight due to
optional equipment (definition) ...... 319
Information on driving .................... 302
Kilopascal (kPa) (definition) ........... 319
Labeling (overview) ........................ 315
Load bearing index (definition) ...... 320
Load index ..................................... 317
Load index (definition) ................... 319
Maximum load on a tire (defini-
tion) ............................................... 319
Maximum loaded vehicle weight
(definition) ..................................... 319
Maximum permissible tire pres-
sure (definition) ............................. 319
Maximum tire load ......................... 317
Maximum tire load (definition) ....... 319
MOExtended tires .......................... 303
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 gin 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 125). 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 294).
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.
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 276). Observe the warning notes
as you do so and add coolant if necessary.
130Driving
Driving and parking

Coolant temperature gauge
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
!A display message is shown if the coolant
temperature is too high.
If the coolant temperature is above 257 ‡
(125 †) do not drive any further. The engine
will otherwise be damaged.
The coolant temperature gauge is in the lower
section of the tachometer (
Ypage 34).
Under normal operating conditions and with the
specified coolant level, the coolant temperature
may rise to 255 ‡ (124 †).
Operating the on-board computer
:Instrument cluster with multifunction dis-
play
;Right control panel
=Left control panel
XTo activate the on-board computer: turn
the SmartKey to position 1in the ignition lock. You can control the multifunction display and
the settings in the on-board computer using the
buttons on the multifunction steering wheel.
Left control panel
òROpens the menu list
9
:Press briefly:
RScrolls in lists
RSelects a menu or function
RIn the
RadioorMediamenu:
opens the track or station list and
selects a station, an audio track or
a video scene
RIn the Telephonemenu: switches
to the phone book and selects a
name or a telephone number
9
:Press and hold:
RScrolls quickly through all lists
RIn the RadioorMediamenu:
selects a station, audio track or
video scene using rapid scrolling
RIn the Telephonemenu: starts
rapid scrolling if the phone book is
open
aRIn all menus: confirms the selected
entry in the list
RIn the RadioorMediamenu:
opens the list of available radio
sources or media
RIn the Telephonemenu: switches
to the phone book and starts dial-
ing the selected number
ñRSwitches off the Voice Control
System (see the separate operat-
ing instructions)
%Press briefly:
RBack
RIn the RadioorMediamenu: dese-
lects the track or station list or list
of available radio sources or media
RHides display messages
RExits the telephone book/redial
memory
%Press and hold:
RCalls up the standard display in the
Tripmenu
188Displays and operation
On-board computer and displays

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 276).
If you have to add coolant frequently:
XContact a qualified specialist workshop and have the engine cooling
system checked.
?The fan motor is malfunctioning.
XAt coolant temperatures below 257 ‡(125 †), drive to the nearest
qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, 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 140).
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 257 ‡ (125 †). Otherwise, the
engine could be damaged.
XPay attention to the coolant temperature gauge.
If the temperature increases again:
XVisit a qualified specialist workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 255 ‡ (124 †).
Display messages217
On-board computer and displays
Z

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 comes on while the engine is running. The coolant
temperature gauge is at the beginning of the cold range.
The temperature sensor for the coolant temperature gauge is malfunctioning.
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 140).
XConsult a qualified specialist workshop.
238Warning 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 defective.
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 140).
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 276).
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 257 ‡
(125 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, 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 255 ‡(124 †). 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 140).
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 276).
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 cluster239
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
XAt coolant temperatures below 257‡(125 †), you can continue driving to the
nearest qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, 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.
Further information on PRE ‑SAFE
®Brake (Ypage 68).
For further information about the distance warning function of COLLISION PRE-
VENTION ASSIST PLUS, see (
Ypage 64).
240Warning and indicator lamps in the instrument cluster
On-board computer and displays