2010 MERCEDES-BENZ SLK55AMG coolant temperature

X
Slowly insert oil dipstick : fully into the
dipstick guide tube.
X Pull out oil dipstick : again after
approximately 3 seconds to obtain
accurate reading.
The oil level is correct when it is between
lower (min) mark = and upper (max)
mark ; of oil dipstick :.
i The filling quantity between the upper and
lower marks on the oil dipstick is
approximately 2.1 US qt. (2.0 l).
X If necessary, add engine oil.
For more information on engine oil, see
“Fuels, coolants, lubricants etc.”
(Y page 300).
For information on messages in the
multifunction display concerning engine oil,
see the “Practical hints” section
(Y page 250).
Checking engine oil level with the
control system On the SLK 55 AMG you can check the engine
oil level with the control system.
X
Switch on the ignition.
The standard display appears in the
multifunction display ( Y page 96).
X Press button * or & on the
multifunction steering wheel repeatedly
until the following message appears in the
multifunction display: One of the following messages will
subsequently appear in the multifunction
display:
R
Engine Oil Level OK
R Add 1.0 qt. (Canada: 1.0 liter)
to reach max. oil level.
R Add 1.5 qts. (Canada: 1.5 liters)
to reach max. oil level.
R Add 2.0 qts. (Canada: 2.0 liters)
to reach max. oil level.
i If you want to interrupt the checking
procedure, press button * or & on
the multifunction steering wheel.
X If necessary, add engine oil.
For more information on engine oil, see
“Fuels, coolants, lubricants etc.”
(Y page 300).
Other display messages
If the ignition is not switched on, the following
message appears in the multifunction
display:
Turn on ignition
to see engine oil level.
X Switch on the ignition.
If you see the message:
Observe
Waiting Time
X If the engine is at operating temperature,
wait 5 minutes before repeating check
procedure.
X If the engine is not at operating
temperature yet, you must wait 30 minutes
before checking oil.
If you see the message:
Cannot check engine oil level
with engine on.
X Turn off the engine.
X If the engine is at operating temperature,
wait 5 minutes before checking oil.
X If the engine is not at operating
temperature yet, you must wait 30 minutes
before checking oil. 194
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authorized Mercedes-Benz Center check the
transmission.
Coolant level
The engine coolant is a mixture of water and
anticorrosion/antifreeze.
When checking the coolant level, the vehicle
must be parked on level ground, and the
coolant temperature must be below 158‡
(70†). G
Warning!
In order to avoid any potentially serious burns:
R Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system, or
if the coolant temperature display indicates
that the coolant is overheated.
R Do not remove the cap on the coolant
expansion tank if the coolant temperature
is above 158‡ (70†). Allow the engine to
cool down before removing the cap. The
coolant expansion tank contains hot fluid
and is under pressure.
R Using a rag, slowly open the cap
approximately 1
/ 2 turn counterclockwise
to relieve excess pressure. If opened
immediately, scalding hot fluid and steam
will be blown out under pressure.
R Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. Example illustration: SLK 350
X
Using a rag, slowly open cap ;
approximately 1
/ 2 turn counterclockwise
to relieve excess pressure.
X Continue turning cap ; counterclockwise
and remove it.
The coolant level is correct if the level
R for cold coolant: reaches marking bar
= in coolant expansion tank :
R for warm coolant: is approximately 0.6 in
(1.5 cm) higher
X Add coolant as required.
X Screw cap ; back on and tighten it.
For more information on coolant, see the
“Technical data” section ( Y page 301) and
(Y page 304). Washer system and headlamp
cleaning system
G
Warning!
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
! Always use washer solvent/antifreeze
where temperatures may fall below
freezing point. Failure to do so could result
in damage to the washer system/fluid
reservoir. 196
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Display messages
Possible causes/consequences and
X Solutions+ Please
get a new
key. The SmartKey is malfunctioning.
X
Contact an authorized Mercedes-Benz Center. ~ Bluetooth
Ready The telephone has not yet been connected to the audio
system or COMAND system via Bluetooth
®
.
X Connect the telephone to the audio system or COMAND
system via Bluetooth ®
. ¥ Top Up
Washer
Fluid The washer fluid in the washer fluid reservoir has fallen below
the minimum level.
X
Add washer fluid ( Y page 196). Engine
Display messages
Possible causes/consequences and
X Solutions=
(USA only)
;
(Canada
only) Engine
Service There may be a malfunction in
R
the fuel management system
R the ignition system
R the exhaust system
R the fuel system
X Have the engine checkedas soon as possible at an
authorized Mercedes-Benz Center. ; Display
Malfunctio
n
Drive To
Workshop Certain electronic systems are unable to relay information to
the control system. The coolant temperature display or the
tachometer may have failed.
X
Have the electronic systems checked at an authorized
Mercedes-Benz Center. + Top Up
Coolant
See
Operator’s
Manual The coolant level is too low.
X
Add coolant (Y page 196).
X If you have to add coolant frequently, have the cooling
system checked at an authorized Mercedes-Benz Center. G
Warning!
Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn
if it comes into contact with hot engine parts. You could be seriously burned. Vehicle status messages in the multifunction display
247Practical hints
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!
Do not ignore the low engine coolant level warning. Extended driving with the message
and
symbol displayed may cause serious engine damage not covered by the Mercedes-Benz
Limited Warranty.
Do not drive without sufficient amount of coolant in the cooling system. The engine will
overheat causing major engine damage. Display messages
Possible causes/consequences and
X Solutions? Coolant
Stop,
turn
engine
off. The coolant is too hot.
X
Stop the vehicle immediately as soon as it is safe to do so.
X Turn off the engine immediately.
X Engage the parking brake.
X Only start the engine again after the message disappears.
You could otherwise damage the engine.
X Observe the coolant temperature in the multifunction
display.
X If the temperature rises again: Contact an authorized
Mercedes-Benz Center immediately.
During severe operation conditions and stop-and-go city
traffic, the coolant temperature may rise close to 248‡
(120†). G
Warning!
Driving when your engine is overheated can cause some fluids which may have leaked into the
engine compartment to catch fire. You could be seriously burned.
Steam

from an overheated engine can cause serious burns which can occur just by opening the
engine hood. Stay away from the engine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until the engine has cooled down.
! The engine should not be operated with the coolant temperature above 248‡ (120†).
Doing so may cause serious damage which is not covered by the Mercedes-Benz Limited
Warranty. 248
Vehicle status messages in the multifunction display
Practical hints
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Display messages
Possible causes/consequences and
X Solutions? Coolant
Stop,
turn
engine
off. The poly-V-belt could be broken.
X
Stop the vehicle immediately as soon as it is safe to do so.
X Turn off the engine immediately.
X Check the poly-V-belt.
X If it is broken: Do not continue to drive. Otherwise the
engine will overheat due to an inoperative water pump
which may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
X If it is intact: Do not continue to drive the vehicle with this
message displayed. Doing so could result in serious engine
damage that is not covered by the Mercedes-Benz Limited
Warranty.
X Observe the coolant temperature in the multifunction
display.
X Drive to the nearest authorized Mercedes-Benz Center
immediately. ? The radiator cooling fan is malfunctioning.
X
Observe the coolant temperature in the multifunction
display.
If

the coolant temperature is below 248‡ (120†), you may
continue driving to an authorized Mercedes-Benz Center.
X Avoid placing heavy loads on the engine (e.g. by driving
uphill) as well as stop-and-go traffic.
X Have the fan replaced as soon as possible. # The battery is no longer charging.
Possible causes:
R
alternator malfunctioning
R broken poly-V-belt
X Stop immediately in a safe location or as soon as it is safe
to do so and check the poly-V-belt.
X If it is broken: Do not continue to drive. Otherwise the
engine will overheat due to an inoperative water pump
which may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
X If it is intact: Drive to the nearest authorized Mercedes-
Benz Center immediately. Adjust driving to be consistent
with reduced braking responsiveness. Vehicle status messages in the multifunction display
249
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Model Capacity Fuels, coolants,
lubricants, etc.
Hydraulic
system for
retractable
hardtop
All models 0.2 US qt (0.195 l) MB Hydraulic Oil
Washer system
and headlamp
cleaning
system
All models 7.4 US qt (7.0 l) MB Windshield
Washer
Concentrate
34
(Y page 306)
Washer fluid mixing
ratio ( Y page 306) Approved engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for our
service intervals. Therefore, only use
approved engine oils and oil filters required
for vehicles with the Maintenance System.
For a listing of approved engine oils and oil
filters, contact an authorized Mercedes-Benz
Center or visit www.mbusa.com (USA only).
! Using engine oils and oil filters of a
specification other than those expressly
required for the Maintenance System, or
changing of oil and oil filter at change
intervals longer than those called for by the
Maintenance System will result in engine or
emission control system damage not
covered by the Mercedes-Benz Limited
Warranty.
Please follow Maintenance System
recommendations for scheduled oil
changes. Failure to do so will result in
engine or emission control system damage
not covered by the Mercedes-Benz Limited
Warranty.
Mercedes-Benz recommends MOBIL OIL. Use the table below to determine the
MB sheet number. Model Engine,
type MB sheet
number
SLK 300 272 229.5
SLK 350 272 229.5
SLK 55 AMG 113 229.5
i
MB sheet numbers are printed on the
outside of oil containers.
Viscosity grades for engine oils Using the chart below, select oil viscosity
according to the lowest air temperature
expected before the next oil change.
34
Mixed with water or commercially available premixed washer solvent/antifreeze. 302
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For information on other Mercedes-Benz
approved products of equal specification,
contact
an authorized Mercedes-Benz Center
or visit www.mbusa.com (USA only).
To provide important corrosion protection,
the solution must be at least 50%
anticorrosion/antifreeze (equivalent to
freeze protection to approximately -35‡
[-37†]).
If you use a solution that is more than 55%
anticorrosion/antifreeze (freeze protection
to approximately -49‡ [-45†]), the engine
temperature will increase due to the lower
heat transfer capability of the solution.
Therefore, do not use more than this amount
of anticorrosion/antifreeze.
If the coolant level is low, water and MB 325.0
Anticorrosion/Antifreeze should be used to
bring it up to the proper level (have cooling
system checked for signs of leakage). Please
make sure the mixture is in accordance with
label instructions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you are not sure about the water quality,
contact an authorized Mercedes-Benz
Center.
Anticorrosion/antifreeze Your vehicle contains a number of aluminum
parts. The use of aluminum components in
motor vehicle engines necessitates that
anticorrosion/antifreeze coolant used in
such engines be specifically formulated to
protect the aluminum parts. Failure to use
such anticorrosion/antifreeze coolant will
result

in a significantly shortened service life.
Therefore, the following product is strongly
recommended for use in your vehicle:
MB 325.0 Anticorrosion/Antifreeze agent.
Before the start of the winter season (or once
a year in hot southern regions), you should
have the anticorrosion/antifreeze
concentration checked.
The coolant is also regularly checked each
time you bring your vehicle to an authorized
Mercedes-Benz Center for service. Model Approximate freeze protection
-35‡ (-37†) -49‡ (-45†)
Cooling system
SLK 300
SLK 350 5.2 US qt (4.9 l) 5.7 US qt (5.4 l)
SLK 55 AMG 5.9 US qt (5.55 l) 6.5 US qt (6.1 l)Fuels, coolants, lubricants, etc.
305
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Washer system and headlamp
cleaning system
G
Warning!
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze
on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
X Use MB Windshield Washer Concentrate
“MB SummerFit”.
X Mix with water for temperatures above
freezing point.
X Mix with commercially available premixed
washer solvent/antifreeze for
temperatures below freezing point.
Washer fluid mixing ratio For temperatures above the freezing point:
1 part “MB SummerFit” to 100 parts water
(1.34 fl oz [40 ml] “MB SummerFit” to 1 gal
[4.0 l] water)
For temperatures below freezing point:
1 part “MB SummerFit” to 100 parts solvent
(1.34 fl oz [40 ml] “MB SummerFit” to 1 gal
[4.0 l] solvent)306
Fuels, coolants, lubricants, etc.
Technical data
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