2010 MERCEDES-BENZ ML450 HYBRID engine

Problem
Possible causes/consequences and
X SolutionsThe brake pedal
pulsates. The RBS is providing electronic controlled brake boost. Read and
observe the notes on the ABS/ESP
®
warning lamp ( Y page 9). The HYBRID system switches of automatically
Problem
Possible causes/consequences and
X SolutionsThe HYBRID system
has switched of
automatically. Your vehicle was involved in an accident.
The HYBRID system remains switched off, if
R
the combustion engine cannot be started again after a few
seconds
R the SRS warning lamp + in the instrument cluster comes on
X Contact an authorized Mercedes-Benz Center. The HYBRID system
has switched of
automatically. An
additional message
appears in the
multifunction display. A short circuit in the HYBRID system has occurred or a plug
connection of the HYBRID system was disconnected.
X
Read and observe messages that may appear in the
multifunction display ( Y page 24).
X Contact an authorized Mercedes-Benz Center. Opening the fuel filler flap manually
G
Warning!
Avoid contact with the vehicle walls as they
may contain sharp edges. Otherwise, you
could injure yourself while opening the fuel
filler flap. G
Warning!
Open the fuel filler flap manually only if the
fuel filler flap switch is not operational.
With the fuel filler flap opened manually, fuel
may spray out during the refueling process.
In case the fuel filler flap switch ( Y page 20)
does not release the fuel filler flap, you can
open it manually.
The fuel filler flap release is located behind a
cover on the passenger side in the cargo
compartment. X
Open the tailgate, see Operator's Manual.
X Insert a suitable object such as a coin into
the slot of locks :.
X Turn locks : by 90° in direction of the
arrows.
X Remove cover ;. Practical hints
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X
Pull light-blue fuel filler flap release = in
direction of arrow.
The fuel filler flap is unlocked.
X Open the fuel filler flap ( Y page 21).
X Close cover ;.
X Close the tailgate. Battery
Notes
Your vehicle is equipped with a 12-volt
battery and a high-voltage battery. The high-
voltage battery stores the power required for
the hybrid transmission. The hybrid
transmission also starts the combustion
engine.
Have any work on the batteries performed at
an authorized Mercedes-Benz Center.
i Read and observe the safety notes
(Y page 8) and the notes on the 12-volt
battery in the Operator’s Manual. G
Warning!
The electrolyte, i.e. the battery fluid, is toxic
and caustic. Do not allow this fluid to come in
contact with eyes, skin or clothing, for
example in case of an accident.
In case it does, immediately flush affected
area with water and seek medical help
immediately.
For information on the location of the 12-volt
battery and the high-voltage battery, see
(Y page 12). !
Deep discharge caused by prolonged
periods of the vehicle not being used, can
damage the high-voltage battery.
During such periods, operate the vehicle
every 4 weeks for several minutes in order
to charge the high-voltage battery.
During the charging process, switch off
electrical consumers that are currently not
needed, e.g. climate control system or seat
heating.
If necessary, get a jump start. G
Warning!
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause
unconsciousness and lead to death. Do not
run the engine in confined areas (such as a
garage) which are not properly ventilated.
If you do not intend to operate your vehicle
for an extended period of time, contact an
authorized Mercedes-Benz Center about
steps you need to observe. Charging the battery
Charging the 12-volt battery G
Warning!
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit approved by Mercedes-Benz is
being used. Gases may escape during
charging and could cause an explosion that
may result in personal injury, paint damage or
corrosion.
An accessory battery charge unit specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available. It permits the charging of the
battery in its installed position. Contact an
authorized Mercedes-Benz Center for
information and availability. 32
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Charge battery in accordance with the
separate instructions for the accessory
battery charger.
X Open the hood, see Operators' Manual.
X Follow the instructions in the separate
operating instructions of the charge unit. X
Flip up cover 1 of the positive terminal in
direction of arrow.
X Connect the positive terminal clamp of the
charge unit with positive terminal 2.
X Slide cover = from the negative terminal
in direction of arrow.
X Connect the negative terminal clip of the
charge unit with negative terminal ?.
X Charge the 12-volt battery.
Disconnecting the charge unit X
After the combustion engine has been
started, disconnect the charge unit. Follow
the instructions in the separate operating
instructions of the charge unit.
X Close the hood.
X Drive the vehicle for some time in order to
charge the 12-volt battery. Jump starting
When the 12-volt battery or the high-voltage
battery is discharged, the combustion engine
can be started with jumper cables and the
battery of another vehicle. Observe the following:
R
Jump starting should only be performed
when the combustion engine and the
catalytic converter are cold.
R Do not jump start if the battery is frozen.
Let the battery thaw out first.
R Only jump start from batteries with the
same voltage rating (12 V). Jump starting
with a more powerful battery could damage
the vehicle’s electrical system, which is not
covered by the Mercedes-Benz Limited
Warranty.
R Only use jumper cables with sufficient
cross-section and insulated terminal
clamps.
R Always make sure the jumper cables are
not on or near pulleys, fans or other parts
that move when an engine is started or
running.
R Should the battery be drained completely,
let the donating power source charge the
vehicle for several minutes before
reattempting the starting process.
i Jumper cables and additional information
on jump starting are available at any
authorized Mercedes-Benz Center.
! Jump starting should only be performed
using the jump-start terminals located in
the engine compartment.
Avoid repeated and lengthy starting
attempts.
Do not attempt to start the engine using a
battery quick-charge unit.
If the engine does not run after several
unsuccessful starting attempts, have it
checked at the nearest authorized
Mercedes-Benz Center.
Excessive unburned fuel generated by
repeated failed starting attempts may
damage the catalytic converter and may
present a fire risk.
Make sure the jumper cables do not have
loose or missing insulation. Practical hints
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Make sure the cable clamps do not touch
any other metal part while the other end is
still attached to a battery.
Connecting the jumper cables
Your vehicle is equipped with two jump start
terminals in the engine compartment.
Position
C represents the charged battery of
another vehicle or an equivalent starter pack.
X Make sure the two vehicles do not touch.
X Switch off all electrical consumers.
X Engage the parking brake.
X Make sure the automatic transmission is in
park position P.
X Open the hood, see Operators' Manual.
X Flip up cover : of positive terminal = in
direction of arrow.
X Connect positive terminal ; of charged
battery C with positive terminal = with a
jumper cable. Clamp the cable to positive
terminal ; of charged battery C first.
X Slide cover A from negative terminal B in
direction of arrow.
X Connect negative terminal ? of charged
battery C with negative terminal B with a jumper cable. Clamp the cable to
negative terminal ? of charged battery
C first. Starting the combustion engine
X Start the engine of the vehicle with the
charged battery and run it at an engine
speed slightly above idle speed.
X Make sure the automatic transmission is in
park position P.
X Starting the jump start process with
the SmartKey: To start the charging
process for the high-voltage battery, turn
the SmartKey in the starter switch first into
starting position 3.
X Turn the SmartKey back into ignition
position 2.
X Starting the jump start process with
KEYLESS-GO: Depress the brake pedal
during the starting procedure. 34
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X
Press the KEYLESS-GO start/stop button
once.
X Remove the foot from the brake pedal.
Ignition is switched on automatically.
The message Charging Hybrid
Battery Please Wait appears in the
multifunction display.
Start the combustion engine when the
message Engine Can Now Be Started
appears in the multifunction display.
Depending on the high-voltage battery's
discharge, the charging procedure may
take up to 60 minutes.
X After the combustion engine of your vehicle
has
been started, leave the engines of both
vehicles running at idle speed. Disconnecting the jumper cables
X Disconnect the jumper cables in reverse
order, starting with jump start terminal 4
(Y page 34).
X Close the hood.
X Drive the vehicle for some time in order to
charge the 12-volt battery and the high-
voltage battery. Practical hints
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Vehicle specification ML 450 HYBRID
(164.195)
The quoted data apply only to the standard
vehicle. Contact an authorized Mercedes-
Benz
Center for the corresponding data of all
special bodies and special equipment. Engine ΜL 450 HYBRID
Engine, type
272
Mode of operation
4-stroke engine,
gasoline injection No. of cylinders
6
Bore
3.66 in (92.90 mm)
Stroke
3.39 in (86.00 mm)
Total piston
displacement
213.5 cu in
(3 498 cm 3
) Compression
ratio
11.5:1
Output acc. to
SAE J 1349
1 275 hp/6
000 rpm
(205 kW/6 000 rpm) Maximum torque
acc.

to SAE J 1349 258 lb-ft/
3 000 - 5 500
(350 Nm/
3 000 - 5 500 rpm) Maximum engine
speed
6 000 rpm
Firing order
1-4-3-6-2-5
Poly-V-belt
2 398 mm
Hybrid ΜL 450 HYBRID
Type
Full hybrid
Concept
Two mode
Output EMA
83 hp
(62 kW) Hybrid ΜL 450 HYBRID
Output EMB
80 hp
(60 kW) Maximum torque
EMA
173 lb-ft (235 Nm)
Maximum torque
EMB
192 lb-ft (260 Nm)
System power
335 hp (250 kW)
381 lb-ft (517 Nm) Electrical system ΜL 450 HYBRID
High-voltage
battery
288 V/45 kW
Battery
12 V/70 Ah
Spark plugs, type
Bosch Y 7 MPP33
Spark plugs,
electrode gap
0.031 in (0.8 mm)
Spark plugs,
tightening torque
15 - 18 lb-ft
(20 - 25 Nm) Main dimensions ΜL 450 HYBRID
Overall vehicle
length
188.5 in (4
788 mm) Overall vehicle
width
2 83.6 in (2
124 mm) Overall vehicle
height
69.8 - 73.0 in
(1 774 - 1
854 mm) Wheelbase
114.8 in (2
915 mm) Track, front
64.7 in (1
644 mm) Track, rear
64.8 in (1
647 mm) Ground clearance
7.3 - 10.3 in
(186 - 261 mm)
Turning circle
39.0 ft (11.6 m)
1
Premium fuel required. Performance may vary with fuel octane rating.
2 Exterior rear view mirrors folded out. 36
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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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