2010 MERCEDES-BENZ CL CLASS coolant temperature

X
If necessary, add engine oil.
For more information on engine oil, see
“Fuels, coolants, lubricants etc.”
(Y page 490).
For information on messages in the
multifunction display concerning engine oil,
see the “Practical hints” section
(Y page 444).
Checking engine oil level with the
control system On the CL 600 and CL 65 AMG you can check
the engine oil level with the control system.
i
The menu overview can be found on
(Y page 203).
X Switch on the ignition.
X Press = or ; on the multifunction
steering wheel to select the Service
menu.
X Press 9 or : on the multifunction
steering wheel to select Engine Oil
Level.
X Press a.
The following message appears in the
multifunction display:
Measuring
Engine Oil Level
Accurate Only
When Vehicle Is Level
One of the following messages will
subsequently appear in the multifunction
display:
R Engine Oil Level
OK
R Add 1.0 qts. Engine Oil
At Next Refueling
(Canada: 1.0 l)
R Add 1.5 qts. Engine Oil
At Next Refueling
(Canada: 1.5 l)
R Add 2.0 qts. Engine Oil
At Next Refueling (Canada:
2.0 l)
i If you want to interrupt the checking
procedure, press button % on the
multifunction steering wheel.
X If necessary, add engine oil.
For more information on engine oil, see
“Fuels, coolants, lubricants etc.”
(Y page 490).
Other display messages
If the
ignition is not switched on, the following
message appears in the multifunction
display:
For Engine Oil Level
Ignition Must be On
X Switch on the ignition.
Need More Time
to Check
Engine Oil Level
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:
Engine Oil Level
Not Measurable
With Running Engine
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.
If there is excess engine oil with the engine at
normal operating temperature, the following
message appears in the multifunction
display:
Reduce
Engine Oil Level
X Have excess oil siphoned or drained off.
Contact an authorized Mercedes-Benz
Center. 370
Engine compartment
Operation
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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 gauge 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: CL 550 4MATIC 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 491) and
(Y page 494). 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.
! Only use washer fluid which is suitable for
plastic lenses. Improper washer fluid can
damage the plastic lenses of the
headlamps.
! Do not use distilled or deionized water in
the washer fluid reservoir. Otherwise, the
washer fluid level sensor could be
damaged.
Fluid for the washer system and the headlamp
cleaning system is supplied from the washer
fluid reservoir. 372
Engine compartmentOperation
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Engine
Display messages
Possible causes/consequences and
X Solutions+ Check
Coolant
Level See
Oper.
Manual The coolant level is too low.
X
Add coolant (Y page 372).
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.
! 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
Low Stop
Vehicle
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 gauge in the instrument
cluster.
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. 442
Vehicle status messages in the multifunction display
Practical hints
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!
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. Display messages
Possible causes/consequences and
X Solutions? Coolant
Low Stop
Vehicle
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 gauge in the instrument
cluster.
X Drive to the nearest authorized Mercedes-Benz Center
immediately. ? The radiator cooling fan is malfunctioning.
X
Observe the coolant temperature gauge in the instrument
cluster.
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. Vehicle status messages in the multifunction display
443
Practical hints
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Model Capacity Fuels, coolants,
lubricants, etc.
Automatic
transmission
CL 550 4MATIC 10.6 US qt (10.0 l) MB Automatic
Transmission Fluid
CL 600 7.9 US qt (7.5 l)
CL 63 AMG
58 9.25 US qt (8.75 l)
CL 65 AMG 9.2 US qt (8.7 l)
Rear axle
CL 550 4MATIC 1.9 US qt (1.8 l) Hypoid gear oil
(SAE 85W-90)
CL 600 1.7 US qt (1.6 l)
CL 63 AMG 1.3 US qt (1.2 l) Fuchs Titan
EG 5010 D
CL 65 AMG 1.7 US qt (1.6 l)
Hydraulic
system for
active body
control (ABC)
CL 600
CL 63 AMG
CL 65 AMG 4.2 US qt (4.0 l) MB ABC Fluid
Power steering
CL 550 4MATIC
CL 63 AMG approx. 1.1 US qt (1.0 l) MB Power Steering
Fluid (Chevron
Texaco PSF 9109)
CL 600
CL 65 AMG approx. 1.3 US qt (1.2 l)
Brake system
All models 0.63 US qt (0.6 l) MB Brake Fluid
(DOT 4+)
Cooling system
CL 550 4MATIC approx. 12.7 US qt (12.0 l) MB 325.0
Anticorrosion/
Antifreeze
CL 600 approx. 15.9 US qt (15.0 l)
CL 63 AMG approx. 11.3 US qt (10.7 l)
CL 65 AMG approx. 14.7 US qt (13.9 l)
Low
temperature
cooling system
CL 600 approx. 2.8 US qt (2.6 l)
Fuel tank
All models 23.8 US gal (90.0 l) Premium unleaded
gasoline (Minimum
Posted Octane 91
[Avg. of
96 RON/86 MON])
Fuel tank
reserve
CL 550 4MATIC
CL 600 approx. 2.9 US gal (11.0 l)
CL 63 AMG
CL 65 AMG approx. 3.7 US gal (14.0 l)
58
Automatic transmission with oil cooler. Fuels, coolants, lubricants, etc.
491Technical data
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Viscosity grades for engine oils
Using the chart below, select oil viscosity
according to the lowest air temperature
expected before the next oil change.
Engine oil additives
! Do not blend oil additives with engine oil.
They may damage the engine. Damage or
malfunctions resulting from blending oil
additives are not covered by the Mercedes-
Benz Limited Warranty. Air conditioning refrigerant
R134a (HFC) refrigerant and special PAG
lubricating oil are used in the air conditioning
system.
! Never use R 12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the
system will occur. Brake fluid
G
Warning!
During vehicle operation, the boiling point of
the brake fluid is continuously reduced
through the absorption of moisture from the
atmosphere.
Under extremely strenuous operating
conditions, this moisture content can lead to
the formation of bubbles in the system, thus
reducing the system’s efficiency. Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle’s Maintenance
Booklet for replacement interval.
Only brake fluid approved by Mercedes-Benz
is recommended. Any authorized Mercedes-
Benz Center will provide you with additional
information. Premium unleaded gasoline
G
Warning!
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact. Extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging your
health.
! To maintain the engine’s durability and
performance, premium unleaded gasoline
must be used.
If premium unleaded gasoline is not
available and low octane gasoline is used,
follow these precautions:
R Have the fuel tank only partially filled
with unleaded regular gasoline and fill up
with premium unleaded gasoline as soon
as possible.
R Avoid full throttle driving and abrupt
acceleration.
R Do not exceed an engine speed of
3 000 rpm if the vehicle is loaded with a
light load such as two persons and no
luggage.
R Do not exceed 2
/ 3 of maximum
accelerator pedal position if the vehicle Fuels, coolants, lubricants, etc.
493Technical data
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The coolant solution must be used year round
to
provide
the necessary corrosion protection
and increase boil-over protection. Refer to
the Maintenance Booklet for replacement
interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance Booklet is only applicable if
MB 325.0 Anticorrosion/Antifreeze solution
or other Mercedes-Benz approved products
of equal specification are used to renew the
coolant concentration or bring it back up to
the proper level.
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. Fuels, coolants, lubricants, etc.
495
Technical data
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Model Approximate freeze protection
-35‡ (-37†) -49‡ (-45†)
Cooling system
CL 550 4MATIC 6.3 US qt (6.0 l) 7.0 US qt (6.6 l)
CL 600 7.9 US qt (7.5 l) 8.8 US qt (8.3 l)
CL 63 AMG 5.7 US qt (5.4 l) 6.2 US qt (5.9 l)
CL 65 AMG 7.4 US qt (7.0 l) 8.1 US qt (7.7 l)
Low temperature
cooling system
CL 600 1.4 US qt (1.3 l) 1.5 US qt (1.4 l)
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)496
Fuels, coolants, lubricants, etc.
Technical data
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