cooling MERCEDES-BENZ CL CLASS 2010 User Guide
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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
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Page 493 of 500

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.
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is fully loaded or operating in
mountainous terrain.
Fuel requirements
Only use premium unleaded gasoline. The
octane number
(posted at the pump) must be
91 min. It is an average of both the Research
Octane Number (RON) and the Motor Octane
Number (MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Reformulated gasolines (RFG) and/or
unleaded gasoline containing oxygenates
such as ethanol, TAME, ETBE, IPA, IBA, and
TBA can be used provided the ratio of any one
of these oxygenates to gasoline does not
exceed 10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is not
allowed. Gasohol, which contains 10%
ethanol and 90% unleaded gasoline, can be
used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc. Gasoline additives
A major concern among engine
manufacturers is carbon build-up caused by
gasoline. Mercedes-Benz recommends only
the use of quality gasoline containing
additives that prevent the build-up of carbon
deposits.
After an extended period of using fuels
without such additives carbon deposits can
build up, especially on the intake valves and
in the combustion area, leading to engine
performance problems such as:
R Warm-up hesitation
R Unstable idle
R Knocking/pinging R
Misfire
R Power loss
In areas where carbon deposits may be
encountered due to lack of availability of
gasoline which contains these additives, the
use of Mercedes-Benz approved additives is
recommended.
Contact an
authorized Mercedes-Benz Center
or visit www.mbusa.com (USA only) for a
listing of approved products. Follow
directions on the product label.
Do not blend other fuel additives with fuel.
This only results in unnecessary cost and may
be harmful to the engine operation.
! Damage or malfunction resulting from
poor fuel quality or from blending additional
fuel additives other than those tested and
approved by us for use on Mercedes-Benz
vehicles are not covered by the Mercedes-
Benz Limited Warranty or by any pre-owned
or Extended Limited Warranties. Coolants
The engine coolant is a mixture of water and
anticorrosion/antifreeze, which provides:
R Corrosion protection
R Freeze protection
R Boiling protection
(by increasing the boiling
point)
The cooling system was filled at the factory
with a coolant providing freeze protection to
approximately -35‡ (-37†) and corrosion
protection.
! Add premixed coolant solution only.
Adding water and MB 325.0 Anticorrosion/
Antifreeze separately from each other,
could cause engine damage not covered by
the Mercedes-Benz Limited Warranty.
If the antifreeze mixture is effective to -35‡
(-37†), the boiling point of the coolant in the
pressurized cooling system is reached at
approximately 266‡ (130†). 494
Fuels, coolants, lubricants, etc.
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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.
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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.
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