2006 MERCEDES-BENZ C55AMG cooling

367 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
BCoolant
Check levelThe coolant level is too low.Add coolant (page 301).
If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Center.
Warning!G
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 can 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.

369 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
•Coolant
Stop, engine off!The poly-V-belt could be broken.Stop the vehicle in a safe location and
immediately turn off the engine.
Check the poly-V-belt.
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. Notify
an authorized Mercedes-Benz Center.
If it is intact:
Do not continue to drive the vehicle with this
message displayed. Doing so could result in seri-
ous engine damage that is not covered by the
Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge in the in-
strument cluster (
page 24).
Drive immediately to the nearest authorized Mer-
cedes-Benz Center.
Coolant
Visit workshopThe cooling fan for the coolant is
malfunctioning.Observe the coolant temperature gauge in the in-
strument cluster (
page 24).
Have the fan replaced as soon as possible.

436 Technical data
Fuels, coolants, lubricants, etc.
Capacities
Vehicle components and their respectivelubricants must match. Therefore only use
products tested and approved by
Mercedes-Benz. Please refer to the Factory Approved
Service Products pamphlet, or inquire at
your Mercedes-Benz Center.
CapacityFuels, coolants, lubricants, etc.
Engine with oil filter9.0 US qt (8.5 l)Approved engine oils
Automatic transmission9.3 US qt (8.7 l)MB Automatic Transmission Fluid
Rear axle1.5 US qt (1.4 l)Hypoid gear oil SAE 85 W 90
Power steeringapprox. 1.1 US qt (1.0 l)MB Power Steering Fluid (Pentosin CHF 11S)
Front wheel hubsapprox. 2.1 oz (60 g) eachHigh temperature roller bearing grease
Brake system0.5 US qt (0.5 l)MB Brake Fluid (DOT 4+)
Cooling systemapprox. 12.8 US qt (12.0 l)MB 325.0 Anticorrosion/antifreeze agent
Fuel tank
including
a reserve of16.4 US gal (62.0 l)
2.6USgal (10.0l)Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg. of 96 RON/86 MON)
Air conditioning systemR-134a refrigerant and special PAG lubricant oil
(never R-12)
Windshield washer3.2 US qt (3.0 l)MB Windshield Washer Concentrate1
1Use MB Windshield Washer Concentrate “MB SummerFit” and water for temperatures above freezing point or MB Windshield Washer Concentrate “MB SummerFit”
and commercially available premixed windshield washer solvent/antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 442).
Windshield washer and headlamp
cleaning system*6.4 US qt (6.0 l)

439 Technical data
Fuels, coolants, lubricants, etc.
In areas where carbon deposits may be
encountered due to lack of availability of
gasolines which contain these additives,
Mercedes-Benz recommends the use of
additives approved by us for use on
Mercedes-Benz vehicles. Refer to Factory
Approved Service Products pamphlet for a
listing of approved product(s). Follow
directions on product label.
Do not blend other fuel additives with fuel.
This only results in unnecessary cost and
may be harmful to 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 listed in the
Factory Approved Service Products
pamphlet are not covered by the
Mercedes-Benz Limited Warranty. Fuel requirements
Only use premium unleaded fuel:

The octane number (posted at the
p um p) m us t be 91 mi n. It i s an a vera ge
of both the Research (R) octane num-
ber and the Motor (M) octane number:
(R+M)/2. This is also known as the
ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, 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.
Coolants
The engine coolant is a mixture of water
and anticorrosion/antifreeze, which
provides:

Corrosion protection

Freeze protection

Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -22°F (-30°C) and
corrosion protection.
If the antifreeze mixture is effective
to -22°F (-30°C), the boiling point of the
coolant in the pressurized cooling system
is reached at approx. 266°F (130°C).

440 Technical data
Fuels, coolants, lubricants, etc.
The coolant solution must be used
year-round to provide the necessary corro-
sion protection and increase boil-over
protection. Refer to 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 (see
Factory Approved Service Products
pamphlet) are used to renew the coolant
concentration or bring it back up to the
proper level.
To provide important corrosion protection,
the solution must be at least 45%
anticorrosion/antifreeze [equivalent to
freeze protection to approx. -22°F
(-30°C)]. If you use a solution that is more than 55%
anticorrosion/antifreeze [freeze
protection to approx. -49°F (-45°C)], 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,
consult 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 specifi-
cally formulated to protect the aluminum
parts.
Failure to use such anticorrosion/anti-
freeze coolant will result in a significantly
shortened service life.
Therefore, the following product is strongly
recommended for use in your vehicle:
Mercedes-Benz 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.

449 Index
A
ABS 25, 82, 443
Indicator lamp 350
Messages in display 360
Accelerator position,
automatic transmission 158
Accessory weight 331
Accident
In case of 53
Active head restraint 71, 391
Active head restraints
see Head restraints
Additional turn signals 395
Air bags 61
BabySmart
TM deactivation
system 75, 443
Children 75
Front passenger front air bag off
indicator lamp 27, 75, 357
Front, Driver 65
Front, Passenger 65
Passenger 65
Safety guidelines 64
Side impact (front and rear*) 66
Window curtain 66Air conditioning refrigerant 437
Air conditioning system
Automatic climate control*
(Canada only) 184
Climate control 174
Air conditioning, Cooling
Automatic climate control*
(Canada only) 194
Climate control 182
Air distribution
Automatic climate control*
(Canada only) 189
Climate control 178
Air pressure see Tire inflation pressure
Air pump, electric
Turning on 409
Air recirculation mode
Automatic climate control*
(Canada only) 191
Climate control 180
Air vents, Front
Automatic climate control*
(Canada only) 185
Climate control 175Air vents, Rear
Automatic climate control*
(Canada only) 196
Climate control 183
Air volume
Automatic climate control*
(Canada only) 190
Climate control 178
Alignment bolt (vehicle tool kit) 406, 443
Anticorrosion/antifreeze 440, 441
Anti-theft systems 88
Anti-theft alarm system* 88
Immobilizer 88
Tow-away alarm* 90
Aquaplaning see Hydroplaning
Armrest 257
Ashtrays 260
Aspect ratio 331
ATF (Automatic transmission fluid) 301
AUDIO menu (Control system) 131