cooling MERCEDES-BENZ SLK ROADSTER 2012 Owners Manual

1, 2, 3 ...
12 Vsocket
see Socket A
ABS (Anti-lock Braking System) Display message ............................ 200
Function/notes ................................ 54
Important safety notes ....................54
Warning lamp ................................. 226
Activating/deactivating air-recir-
culation mode .................................... 121
Activating/deactivating cooling
with air dehumidification .................117
Active light function .........................104
Active Service Syste mPLUS
see ASSYS TPLUS service interval
display
ADAPTIVE BRAKE .................................59
Adaptive brake lamps .........................56
Additional speedometer ...................191
Additives (engine oil) ........................308
Adjusting the headlamp range .........102
Airbag Headbag .......................................... 43
Airbags
Front airbag (driver, front
passenger )....................................... 41
Important safety guidelines .............40
Sidebag ............................................ 42
Triggering ......................................... 39
Air-conditioning system
see Climate control
AIRGUIDE ............................................. 84
Air pressure see Tyre pressure
AIRSCARF
Problem (malfunction) .....................92
Setting the vents ........................... 123
Switching on/off .............................. 91
Airv ents
Important safet ynotes .................. 122
Setting ........................................... 122
Setting the AIRSCARF vents ..........123
Setting the centre air vents ...........123 Setting the side air vents
...............123
Switching AIRSCARF on/off ............91
Alarm system
see ATA (Anti-Theft Alarm system)
Alertness Assistant
see ATTENTION ASSIST
Ambient lighting (on-board com-
puter) ................................................. .192
AMG menu (on-board computer) .....195
Anti-glare film .................................... 246
Anti-loc kBraking System
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Aquaplaning ....................................... 150
Ashtray ............................................... 240
Assistance menu (on-board com-
puter) ................................................. .189
ASSYST PLUS see ASSYST PLUS service interval
display
ASSYST PLUS service interval dis-
play
Displaying service messages .........253
Hiding service messages ...............253
Notes ............................................. 253
Service messages ..........................252
ATA (Anti-Theft Alarm system)
Activating/deactivating ...................61
Function .......................................... .61
Interior motion sensor .....................62
Switching off the alarm ....................61
Tow-away protection ........................ 62
ATTENTIO NASSIST
Activating/deactivating .................190
Display message ............................ 213
Function/notes ............................. 173
Audio menu (on-board computer) ....186
Authorised workshop see Qualified specialist workshop
AUTO lights
Display message ............................ 211
see Lights
Automatic engine start (ECO start/
stop function) .................................... 132
Automatic engine switch-off (ECO
start/stop function) ..........................1314
Index

C
Calling up a fault see Display messages
Capacities
see Technical data
Car
see Vehicle
Care
Automatic car wash .......................254
Carpets .......................................... 258
Display ........................................... 257
Exterior lighting ............................. 256
Gea rors electo rlever .................... 258
High-pressure cleaner .................... 254
Interior ........................................... 257
Matt paintwork .............................. 255
Notes ............................................. 253
Paint .............................................. 255
Plastic trim .................................... 257
Roof lining ...................................... 258
Seat bel t........................................ 258
Seat cover ..................................... 258
Sensors ......................................... 257
Steering wheel ............................... 258
Tai lpipes ....................................... 257
Trim pieces .................................... 258
Washing by hand ........................... 254
Wheels ........................................... 255
Windows ........................................ 256
Wiper blades .................................. 256
Wooden trim .................................. 258
Car key
see Key
Car wash (care) ................................. 254
CD player/CD changer(on-board
computer) .......................................... 186
Cell phone see Mobile phone
Central locking
Automatic locking (on-board com-
puter) ............................................. 193
Locking/unlocking (key ).................. 66
Centre console
Lowe rsection .................................. 33
Uppe rsection .................................. 32Changing bulbs
Dipped-bea mheadlamps ............... 108
Important safety notes ..................106
Main-beam headlamps ................... 108
Overview of bul btypes .................. 107
Parking lamps (front) .....................108
Removing/replacing the cover
(front wheel arch) .......................... 107
Reversing lamps ............................ 109
Standing lamps .............................. 108
Turn signals (front) ......................... 108
Children
In the vehicle ................................... 47
Restraint systems ............................ 47
Child seat
Automatic recognition .....................49
On the front-passenger sea t............ 48
Problem (malfunction) .....................51
Recommendations ...........................52
Suitable positions ............................ 51
Cigarette lighter ................................ 240
Cleaning Mirro rturn signal ........................... 256
Climate control
Air conditioning ............................. 115
Controlling automatically ...............118
Convenience opening/closing
(air-recirculatio nmode) ................. 121
Cooling with aird ehumidification..117
Demisting the windows .................. 120
Demisting the windscreen .............120
Important safety notes ..................114
Indicator lamp ................................ 118
Notes on using the air-condition-
ing system ..................................... 115
Notes on using THERMOTRONIC
automatic climate control ..............116
Overview of systems ......................114
Problems with cooling with air
dehumidification ............................ 118
Problem with the rear window
heating .......................................... 121
Setting the aird istribution.............119
Setting the airflow .........................119
Setting the airv ents...................... 122
Setting the temperature ................118
Switching air-recirculation mode
on/off ............................................ 1216
Index

Switching on/of
f........................... 117
Switching residual hea ton/off ......122
Switching the rear window heat-
ing on/off ...................................... 120
Switching the ZONE function on/
off .................................................. 119
THERMOTRONIC (2-zone) auto-
matic climate control .....................116
Cockpit
Overview .......................................... 26
see Instrument cluster
Collapsible emergency spare
wheel
see Emergency spare wheel
COMAND Online
see separate operating instructions
Combination switch ..........................103
Constant headlamp mode see Daytime driving lamps
Consumption statistics (on-board
computer) .......................................... 183
Convenience closing feature ..............77
Convenience opening/closing (air-
recirculation mode) ........................... 121
Convenience opening feature see Side windows
Coolan t(engine)
Checkin gthe level ......................... 251
Display message ............................ 211
Notes ............................................. 308
Temperature (on-board computer) .195
Temperature gauge ........................ 178
Warning lamp ................................. 231
Cooling
see Climate control
Cornering light function
Function/notes ............................. 104
Cornering light function (display
message) ............................................ 208
Crash-responsive emergency light-
ing ....................................................... 106
Cruise control Cruise control leve r....................... 151
Deactivating ................................... 153
Display message ............................ 217
Driving system ............................... 151
Important safety notes ..................151LIM indicator lamp
.........................151
Selecting ........................................ 152
Setting aspeed .............................. 153
Storing and maintaining current
speed ............................................. 152
Cup holder ......................................... 239 D
Dashboard see Cockpit
Data
see Technical data
Daytime driving lights
Display message ............................ 210
Switching on/off (on-board com-
puter) ............................................. 191
Switching on/off (switch) ..............101
Dealership
see Qualified specialist workshop
Delaye dswitch-off
Exterio rlighting (on-board com-
puter )............................................. 192
Interior lighting .............................. 193
Diagnostics connection ......................22
Diesel ................................................. .305
Diesel particle filter ..........................148
Digital speedometer .........................184
Dipped-beam headlamps Changing bulbs .............................. 108
Display message ............................ 208
Setting for driving abroad (sym-
metrical) ........................................ 100
Setting for driving on the right/
left ................................................. 192
Switching on/off ........................... 101
Display (cleaning instructions) ........257
Display message General information .......................199
Hiding (on-board computer) ...........199
KEYLESS-GO .................................. 222
Display messages
ASSYST PLUS service interval dis-
play................................................ 252
Calling up (on-board computer) .....199
Driving systems ............................. 213
Engine ............................................ 211
Key ................................................ 222 Index
7

Useful information
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviations are possible. Please
note that your vehicle may not be equipped
with all features described. This also
applies to safety-relevan tsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 22).Overview of climate control systems
Important safety notes
G
WARNING
Observe the settings recommended on the
following pages. Otherwise, th ewindows
could mist up. This may obstruct your view of
the traffic situation and, as a result, you may
cause an accident.
The air-conditioning system/
THERMOTRONIC automatic climate control
controls the temperature and the humidity of
the vehicle interior and filters undesirable
substances fro mthe air.
The air-conditioning system/
THERMOTRONIC automatic climate control is
only operational when the engine is run-
ning. 8
The function only works optimally when
the side windows and the roof are closed.
i Ventilate the vehicle for a brief period
during warm weather. This will speed up the
cooling process and the desired vehicle
interior temperature will be reached more
quickly.
i The integrated filter can filter out most
particles of dust and completely filters out
pollen. Aclogged filter reduces the amount
of air supplied to the vehicle interior .For this reason, you should always observe the
interval for replacing the filter, which is
specified in the Service Booklet
.As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.
8 The residual heat function can only be activated/deactivated when the ignition is switched off. 114
Overview of climate control systemsClimate control

partment as well. The indicator lamp in the
á button goes out.
R Use the residual heat function if you want
to heat or ventilate the vehicle interior
when the ignition is switched off. The resid-
ual heat function can only be activated or
deactivated with the ignition switched off. Operating the climate control system
Switching climate control on/off
Important information i
When climate control is switched off, the
air supply and air circulation are also
switched off. Only select this setting
briefly. Otherwise, the windows may mist
up.
i Switch on climate control primarily using
the à button (Y page 118).
Activating/deactivating Air-conditioning system
X
To activate: turn airflow control
C(Y page 115) clockwise to the desired
position (except position 0).
X To deactivate: turn airflow control
C(Y page 115) anti-clockwise to position
0. THERMOTRONIC automatic climate con-
trol
X
Turn the key to position 2in the ignition
lock.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the ^button.
The indicator lamp in the ^button goes
out. The previously selected settings come
into effect again.
X To switch off: press the^button.
The indicator lamp in the ^button lights
up. Activating/deactivating the cooling
with air dehumidification function
Important information The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and dehu-
midified according to the temperature selec-
ted.
G
WARNING
If the "cooling with air dehumidification" func-
tion is deactivated, the air inside the vehicle
will not be cooled (during warm weather) or
dehumidified. The windows could mist up
more quickly. This may preven tyou from
observing the traffic conditions, thereby caus-
ing an accident.
Condensation may drip from the underside of
the vehicle when THERMOTRONIC is in cool-
ing mode. This is normal and not a sign that
there is a malfunction.
Depending on the equipment level, the con-
trol panel has either the Ábutton or the
¿ button.
i The cooling with air dehumidification
function uses refrigerant R134a. This cool- Operating the climate control system
117Climate control Z

ant does no
tcontain chlorofluorocarbons,
and therefore does not damage the ozone
layer.
Activating/deactivating X
To switch on: press the¿orÁ but-
ton.
The indicator lamp in the ¿orÁ
button lights up.
X To deactivate: press the¿orÁ
button.
The indicator lamp in the ¿orÁ
button goes out. The cooling with air dehu-
midification function has a delayed switch-
off feature.
Problems with the cooling with air
dehumidification function When you press the
¿orÁ button, the
indicator lamp in the button flashes three
times or remains off. You can no longer switch
on the cooling with air dehumidification func-
tion.
X Consult a qualified specialist workshop. Setting climate control to automatic
mode
Only THERMOTRONIC automatic climate con-
trol features the "control climate control
automatically" function.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
Automatic mode will achieve optimal opera-
tion if cooling with air dehumidification is also
activated. If desired, cooling with air dehu-
midification can be deactivated. X
Turn the key to position 2in the ignition
lock.
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated.
X To switch off: press the_button.
or
X Press the IorK button.
The indicator lamp in the Ãbutton goes
out. Setting the temperature
Air-conditioning system X
Turn the key to position 2in the ignition
lock.
X To increase/reduce: turn thumb-
wheel :clockwise or anti-clockwise
(Y page 115).
Only change the temperature setting in
small increments. Start at 22 †.
THERMOTRONIC automatic climate
control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the key to position 2in the ignition
lock.
X To increase/reduce: turn controls:and
B (Ypage 116) clockwise or anti-clock-
wise.
Only change the temperature setting in
small increments. Start at 22 †. 118
Operating the climate control systemClimate control

When the buttons or controls for tempera-
ture, airflow or air distribution are activated,
the temperature setting for the driver's side
is not adopted for the other climate control
zones.
X To switch off: press theábutton.
The indicato rlamp in the ábuttongoes
out.
The temperature setting for the driver's
side is adopted for the front-passenger
side. Defrosting the windscreen
You can use this function to defrost the wind-
screen or to demist the inside of the wind-
screen and the side windows.
i You should only select the demisting
function until the windscreen is clear again.
X Turn the key to position 2in the ignition
lock.
X To activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
R cooling with air dehumidification on
R high airflow 9
R high temperature 9
R air distribution to the windscreen and
front side windows
R air-recirculation mode off
X To switch off: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings come
into effect again. The cooling with air dehu- midification function remains on. Air-recir-
culation mode remains deactivated.
or
X Press the Ãbutton 10
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode. Demisting the windows
Windows misted up on the inside X
Activate the "cooling with air dehumidifica-
tion" function ¿11
/Á 12
.
X Activate automatic mode Ã.12
X If the windows continue to mist up, activate
the demisting function (Y page 120).
i You should only select this setting until
the windscreen is clear again.
Windows misted up on the outside X
Activate the windscreen wipers.
X Set the air distribution to OorP.
i You should only select this setting until
the windscreen is clear again. Rear window heating
Switching on/off G
WARNING
Clear all windows of ice or snow before setting
off. Otherwise, impaired visibility could
endanger you and others.
The rear window heating has ahigh current
draw. You should therefore switch it off as
soon as the window is clear .Itotherwise
switches off automatically after several
minutes.
9 Depending on the outside temperature.
10 THERMOTRONIC automatic climate control.
11 Air-conditioning system.
12 THERMOTRONIC automatic climate control. 120
Operating the climate control systemClimate control

Problem Possible causes/consequences and
M Solutions
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.
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 mal-
functioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 251).
Observe the warning notes as you do so.
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 If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. ?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning. 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.
The engine is not being cooled sufficiently and may be damaged.
X Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 251).
Observe the warning notes as you do so.
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 If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. 232
Warning and indicator lamps in the instrument clusterOn-board computer and displays

H
Environmental note
When topping up the oil, take care not to spill
any. If oil enters the soil or waterways, it is
harmful to the environment.
! Only use engine oils and oil filters that
have been approved for vehicles with a
service system. You can obtain a list of the
engine oils and oil filters tested and
approved in accordance with the
Mercedes-Benz Specifications for Service
Products at any Mercedes-Benz Service
Centre.
Damage to the engine or exhaust system is
caused by the following:
R using engine oils and oil filters that have
not been specifically approved for the
service system
R changing the engine oil and oil filter after
missing the change interval required by
the service system
R using engine oil additives
! Do not add too much oil. Topping up with
too much engine oil can result in damage
to the engine or to the catalytic converter.
Have excess engine oil siphoned off. Example: engine oil cap
X
Turn cap :anti-clockwise and remove it.
X Top up the engine oil.
If the oil level is at or under the MIN mark
on the oil dipstick, add 0.5 to 1.0 litre of
engine oil. X
Replace cap :on the filler neck and turn
clockwise.
Make sure that the cap locks into place
securely.
X Chec kthe oil level again with the oil dip-
stick (Y page 250).
Further information on engine oil
(Y page 307). Checking and adding other service
products
Checking the coolant level G
WARNING
The cooling system is pressurised. Therefore,
only unscrew the cap once the engine has
cooled down. The coolant temperature gauge
must display less than 70 †.Otherwise, you
could be scalded if hot coolant escapes. X
Park the vehicle on a level surface.
Only check the coolant level if the vehicle
is on a level surface and the engine has
cooled down.
X Turn the key to position 2in the ignition
lock (Y page 127).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Y page 127).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
70 †.
X Turn the key to position 0(Ypage 127) in
the ignition lock. Engine compartment
251Maintenance and care Z

Additives
!
Do no tuse any additives with the engine
oil. This could damage the engine.
Engine oil viscosity Viscosity describes the flow characteristics
of a fluid. If an engine oil has a high viscosity
rating, it flows slowly; the lower the viscosity,
the faster it flows.
Engine oil selection is based on the respective
outside temperatures and in accordance with
the SAE classification (viscosity). The table
shows you which SAE classifications are to be
used. The low-temperature properties of
engine oils can be significantly impaired dur-
ing operation due to, for example, ageing or
soot and fuel accretion. It is therefore
strongly recommended to observe regularo
il
changes using an approved engine oil with the
appropriate SA Eclassification. Brake fluid
G
WARNING
Over a period of time, the brake fluid absorbs
moisture fro mthe air; This lowers its boiling
point.
If the boiling point of the brake fluid is too low,
vapour pockets may form in the brake system
when the brakes are applied hard (e.g. when
driving downhill). This impairs braking effi-
ciency. You should have the brake fluid renewed at
regular intervals. The brake fluid change inter-
vals can be found in the Service Booklet.
Only use brake fluid approved by Mercedes-
Benz.I nformation abou tapproved brake fluid
can be obtained at any qualified specialist
workshop or on the Internet at
http://bevo.mercedes-benz.com.
i Have the brake fluid regularly checked at
a qualified specialist workshop.
There is usually a notice in the engine com-
partment to remind you when the next
brake fluid change is due. Coolant
Important safety notes G
WARNING
Antifreeze is highly flammable. Fire, naked
flames and smoking are prohibited when han-
dling antifreeze.
If antifreeze comes into contact with hot
engine parts, it may ignite and you could burn
yourself. Do not spill any antifreeze on hot
engine parts.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be
found in the Mercedes-Benz Specifications
for Service Products, MB Specifications for
Service Products 310.1, e.g. on the Inter-
net at http://bevo.mercedes-benz.com.
Or contact a qualified specialist workshop.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engine coolin gsystem is not
sufficiently protected from corrosion and
overheating.
! The engine cooling system is filled with
coolant, which mus tbe renewed after 308
Service products and capacitiesTechnical data