2008 MERCEDES-BENZ SLK ROADSTER coolant temperature

On-board computer
95Function
1 Standard display
menu
( Y page 95)
R Total distance recorder
(Y page 95)
R Tyre pressure loss warning sys-
tem* (Y page 158 )
R Coolant temperature (Y page 96)
R Digital speedometer or outside tem-
perature (Y page 96)
R ASSYST PLUS service displa y
( Y page 165 )
R Engine oil level* (Y page 151 ) 2
AMG
* menu (Y page 96) 3
Audio*/DVD*
menu(Y page 98)
R Radio station (Y page 99)
R Audio drive or media**
(Y page 99)
R DVD video* (Y page 99) Function
4
Navigation
* menu (NAV)
( Y page 100 ) 5
Message memory
menu10
(fault and
warning messages) (Y page 100 ) 6 Settings
menu(Y page 101 )
R Resetting to factory setting s
( Y page 101 )
R Selecting a submenu (Y page 101 ) 7 Trip computer
menu(Y page 107 )
R Consumption statistics
(Y page 107 )
R Range (Y page 107 ) 8
Telephon
e* menu (Y page 108 ) This is what the displays look like when you
scroll through the menus.
The generic terms in the table overview are
intended to help you navigate through the
menus. The terms themselves are not alway
s
displayed in the multi-function display. Depending on the audio system fitted, the
Audio*,
Navigation* and Telephone*
menus are slightly different. The examples
given in this Owner's Manual apply to vehicles
equipped with COMAND APS*. Standard display menu
i Menu overview: see (Y page 94).
Use the buttons on the multi-function steer -
ing wheel.
X Press the èor· button to select the
standard display. Standard display
1
Total distance recorder
2 Trip meter
10 This menu is only visible if there is a display message available. Controls
* optional
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On-board computer
96
You can select the following functions in the
Basic display
menu by pressing the jor
k button:
R tyre pressure loss warning sys-
tem* (Y page 158 )
R coolant temperature
R digital speedometer or outside tempera-
ture
R ASSYST PLUS service displa y
( Y page 165 )
R engine oil level* (Y page 151 )
Displaying the coolant temperatur eX
Press the jork button to select the
coolant temperature. Under normal driving conditions, with the cor-
rect anti-corrosion and antifreeze additive concentration, the reading may rise to
120 †.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale.
Displaying the digital speedometer or
outside temperatur
e If you have selected the digital speedometer
for the Status line
(Y page 103), you can
switch the display to the outside temperature
here 11
.
X Press the jork button to select the
digital speedometer or the outside temper -
ature. Example illustration showing the digital speedom
-
eter displayed AMG* menu
These functions are only available on AMG
vehicles.
i Menu overview: see (Y page 94).
Use the buttons on the multi-function steer -
ing wheel.
X Press the èor· button to select the
AMG menu. 1
Gear indicator
2 Upshift instruction
3 Engine oil temperatur e
In the manual gearshift program, the menu is
displayed in red when the engine reaches the
overrevving range. You will also see shift up
instruction 2. The shift upinstruction is the
only thing shown in the multi-function display
until you shift gear.
11 Vehicles for the United Kingdom: the outside temperature is always displayed. Control
s
* optional
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Engine compartment
154 Coolan
t G
Risk of injury
The cooling system is pressurised. There-
fore, only unscrew the cap once the engine
has cooled down. The coolant temperature
gauge must display less than 70°C. Yo u
could otherwise be scalded by escaping hot
coolant.
Coolant consists of water and antifreeze/cor-
rosion inhibitor. Only check the coolant level
when the vehicle is on a level surface and the
engine has cooled down. Checking the coolant leve
l The expansion tank is located in the engine
compartment on the right-hand side of the
vehicle when viewed in the direction of travel.
1
Expansion tank
2 Cove r
3 Marker bar
X Slowly turn cap 2by half a turn anti-clock -
wise to allow excess pressure to escape.
X Turn cap 2further anti-clockwise and
remove it.
There is sufficient coolant in expansion
tank 1if the coolant is level with marker
bar 3in the filler neck when cold or
approximately 1.5 cm higher when hot .X
Top up the coolant if necessary.
X Replace cap 2and tighten all the way to
the stop.
You will find further information about coolan t
in the "Technical data" section
( Y page 259). Windscreen washer system/head-
lamp cleaning system
*
The washer fluid reservoir is located in the
engine compartment on the right when
viewed in the direction of travel. The head-
lamp cleaning system* is also supplied from
the washer fluid reservoir. 1
Cove r Operation
* optional
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Display
messages 18
0 Display messages Possible cause/consequence Possible solution
D The cooling fan for the coolant is faulty. X
If the coolant temperature is less than 120†,
you can continue driving to the nearest quali-
fied specialist workshop.
X In doing so, avoid heavy loads on the engine
(e.g. driving in mountainous terrain) and stop-
and-go driving. # The battery is not being charged. Possible
causes are a torn poly-V-belt or a faulty
alternator. X
Stop immediately and safely when traffic con-
ditions allow and check the poly-V-belt.
X If it has torn: do not drive on. Contact th e
nearest qualified specialist workshop .
X If it is not damaged :have the vehicle checked
immediately at a qualified specialist workshop. 2 Brake wear The brake pads/linings have reached
their wear limit. X
Have the brake pads/linings replaced as soon
as possible at a qualified specialist workshop .3 Check brake fluid
level
G
Risk of accident
There is insufficient brake fluid in the
brake fluid reservoir. X
Pull over as soon as it is safe to do so.
X Do not continue driving under any circumstan-
ces .
X Consult the nearest qualified specialist work -
shop.
X Do not top up the brake fluid. This will not rec -
tify the malfunction. Practical advice
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Display
messages 18
1 Display messages Possible cause/consequence Possible solution
! Release parking
brake You are driving with the handbrake
applied. X
Release the handbrake .M Close boot separa-
tor The boot separator is open. X
Close the boot separator (Y page 134). D Coolant Stop,
switch engine off The coolant is too hot. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Switch off the engine.
X Wait until the message disappears before
restarting the engine. There is otherwise a risk
of engine damage.
X Observe the coolant temperature gauge
(Y page 96).
X If the temperature increases again, visit a quali-
fied specialist workshop immediately. Practical advice
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Display
messages 18
7 Display messages Possible cause/consequence Possible solution
N Engine oil level
Reduce oil level Vehicles without an oil dipstick: you have
added too much engine oil. There is a risk
of damaging the engine or catalytic con-
verter. X
Siphon off excess engine oil until it is at the
specified level. Observe the legal require-
ments. N Cannot measure
engine oil level Vehicles without an oil dipstick: the meas-
uring system is faulty. X
Visit a qualified specialist workshop. ± Display malfunc-
tion Drive to work-
shop One or more electronic systems are
unable to deliver information to the on-
board computer. The following systems
may have failed:
R
Coolant temperature gauge
R Rev counter
R Cruise control or Speedtronic display X
Visit a qualified specialist workshop. I Remove key You have left the key in the ignition lock. X
Remove the key. I Please replace key The key no longer functions. X
Visit a qualified specialist workshop. 4 Reserve fuel The fuel level has fallen below the reserve
range. X
Refuel at the nearest filling station .t Enter PIN You have not yet logged on to your mobile
phone*. X
Enter the PIN for the SIM card. Practical advice
* optional
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Troubleshooting
20
2 Problem Possible cause/consequence Suggested solutions
A coolant temperature of over
120 °C is displayed. The coolant level is too low. The
coolant is too hot and the engine
is no longer being cooled suffi-
ciently. X
Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 154). Observe the warning notes
as you do so and top up the coolant if necessary. If the coolant level is correct, the
radiator fan may be faulty. The
coolant is too hot and the engin
e
is no longer being cooled suffi-
ciently. X
If the coolant temperature is less than 120°C, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. when driving on
mountain roads and stop/start driving .Practical advice
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Service products and capacities
259Coolant
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
i When the vehicle is first delivered, it is
topped up with a coolant that will ensure
adequate antifreeze and corrosion protec -
tion.
! Only top up with coolant that has been
premixed with the desired quantity of anti -
freeze protection. You could otherwise
damage the engine.
There is more information about coolant
and topping it up on Mercedes-Benz Spec-
ifications for Service Products Sheet
310.1.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the cooling system will not be
sufficiently protected from corrosion, and
the boiling point will be too low .If antifreeze/corrosion inhibitor is present in
the correct concentration, the boiling point of
the coolant will be around 130 °C.
The antifreeze/corrosion inhibitor concentra-
tion in the cooling system should:
R
be at least 50%. This will protect the coolin g
system against freezing down to around –
37 °C.
R not exceed 55% concentration (antifreeze
protection down to –45 °C), otherwise hea t
will not be effectively dissipated .
If the vehicle has lost coolant, top it up with
equal amounts of water and antifreeze/cor-
rosion inhibitor. Mercedes-Benz recom-
mends using an antifreeze/corrosion inhibi -
tor which has been approved for Mercedes-
Benz.
! The cooling system contains a lifetime
supply which must be renewed after 15
years, or after 250, 000 km at the latest.
Have the renewal confirmed in the Service
Booklet.
The warranty is only valid if you top up with
an antifreeze/corrosion inhibitor which
has been approved by Mercedes-Benz. Technical data
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