2010 MERCEDES-BENZ ML450 HYBRID cooling

Introduction
The HYBRID technology combines an
economical combustion engine with a
powerful hybrid transmission. The HYBRID
system selects the most efficient operating
mode
for each driving situation automatically.
You can drive the vehicle in the usual manner.
The HYBRID system turns the combustion
engine off as often as possible in order to save
fuel.
Depending on various conditions such as the
charging level of the high-voltage battery or
the operating temperature, the vehicle can
run on electrical energy alone. These
conditions as well as the degree to which the
driver accelerates determine the vehicle
speed and range that can be achieved for all-
electrical driving. G
Warning!
When the READY indicator in the instrument
cluster is on while the combustion engine is
off, the combustion engine has been turned
off automatically. All vehicle systems
continue

to be active as long as the ignition is
switched on. When you open the driver’s door
and unbuckle the seat belt with the READY
indicator on, while the automatic
transmission is in position N or P, the
combustion engine starts automatically.
Therefore, always do the following before
leaving the vehicle:
R Engage the parking brake.
R Shift the automatic transmission into park
position P.
R Switch off the ignition. The READY indicator
goes out. Driving off and accelerating consumes the
most energy. Thus, the hybrid transmission
supports the combustion engine with the
energy

stored in the high-voltage battery. The
energy is also used for electrical driving, for
operation of the electric compressor of the
cooling system and to support the 12-volt on-
board power supply. The hybrid drive thereby
contributes significantly to the fuel economy
of your vehicle.
For information on driving with HYBRID, see
(Y page 16).
The current operating mode of the HYBRID
system can be displayed in the instrument
cluster (Y page 13) and in the COMAND
display ( Y page 13).
The COMAND can also display a chart of the
fuel consumption and the electric power that
has been generated ( Y page 15). RBS (Recuperative Brake System)
With
the RBS activated (Y page 9), the hybrid
transmission functions as a generator when
coasting and braking. HYBRID converts the
energy of movement into electric power and
stores it in the high-voltage battery. The high-
voltage battery does not require additional
charging by other means. Controls in detail
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Capacities
Vehicle components and their respective
lubricants must match. Therefore only use
products tested and approved by Mercedes-
Benz.
For information on tested and approved
products, contact an authorized Mercedes-
Benz Center or visit www.mbusa.com (USA
only). G
Warning!
Comply with all valid regulations with respect
to handling, storing, and disposing of service fluids. Otherwise you could endanger persons
or the environment.
Keep service fluids out of the reach of
children.
For health reasons, you should prevent
service
fluids from coming into direct contact
with your skin or clothing.
If a service fluid is swallowed, contact a
physician immediately. Model
ML 450 HYBRID Capacity Fuels, coolants,
lubricants, etc.
Engine with oil filter
8.5 US qt (8.0 l) Approved engine
oils
Automatic
transmission
13.4 US qt (12.7 l) MB Automatic
Transmission Fluid
Front axle
1.2 US qt (1.1 l) Hypoid gear oil
Rear axle
1.2 US qt (1.1 l) Hypoid gear oil
Transfer case
0.53 US qt (0.5 l) MB Automatic
Transmission Fluid
Power steering
approx. 1.3 US qt (1.2 l) MB Power Steering
Fluid or approved
Dexron III ATF
Brake system
0.63 US qt (0.6 l) MB Brake Fluid
(DOT 4+)
Cooling system
approx. 10.0 US qt (9.5 l) MB 325.0
Anticorrosion/
Antifreeze
Low temperature
cooling system
approx. 2.0 US qt (1.9 l)
Fuel tank
23.8 US gal (90.0 l) Premium unleaded
gasoline (Minimum
Posted Octane 91
[Avg. of
96 RON/86 MON])
Fuel tank reserve
approx. 3.4 US gal (13.0 l)38
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Model
ML 450 HYBRID Capacity Fuels, coolants,
lubricants, etc.
Air conditioning
system
— R134a refrigerant
and special
PAG lubricant oil
(never R 12)
Washer system and
headlamp cleaning
system
7.6 US qt (7.2 l) MB Windshield
Washer
Concentrate
6
, see
Operator's Manual
Washer fluid mixing
ratio,
see Operator's
Manual Approved engine oils
Use the table below to determine the
MB sheet number.
Model
ML 450 HYBRID Engine,
type MB
sheet
number
272 229.5
i
MB sheet numbers are printed on the
outside of oil containers. i
For
more information on approved engine
oils, refer to the Operator's Manual.
Coolants The engine coolant is a mixture of water and
anticorrosion/antifreeze.
The cooling system was filled at the factory
with a coolant providing freeze protection to
approximately -35‡ (-37†) and corrosion
protection.
Model
ML 450 HYBRID Approximate freeze protection
-35‡ (-37†) -49‡ (-45†)
Cooling system
5.0 US qt (4.75 l) 5.5 US qt (5.2 l)
Low temperature cooling
system
1.0 US qt (0.95 l) 1.1 US qt (1.05 l)
!
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.
i For more information on coolants, refer to
the Operator's Manual.
6 Mixed with water or commercially available premixed washer solvent/antifreeze. Technical data
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