2010 MERCEDES-BENZ ML450 HYBRID warning

Symbol messages
Display messages
Possible causes/consequences and
X Solutionsc Charging
Hybrid
Battery
Please
Wait The high-voltage battery is discharged. You have switched on
the
ignition while the 12-volt battery was being charged with
an approved charge unit or while jump starting the vehicle.
The high-voltage battery is being charged via the voltage
transformer automatically. Depending on the state of the
high-voltage battery's discharge, the charging procedure may
take up to 60 minutes. The message Engine Can Now Be
Started appears in the multifunction display, after the
system became adequately charged to start the combustion
engine (Y page 25).
If the display message Engine Can Now Be Started does
not appear after about an hour:
X Try to start the combustion engine.
X If the combustion engine cannot be started: Contact an
authorized Mercedes-Benz Center. d Malfunctio
n The HYBRID system is malfunctioning.
X
Have the system checked at an authorized Mercedes-Benz
Center. d Stop car,
switch
engine
off. The HYBRID system is malfunctioning. In addition an acoustic
warning sounds.
X
Stop the vehicle in a safe location as soon as possible.
X Engage the parking brake.
X Switch off the ignition.
X Wait at least 60 seconds for the system to complete the
necessary check cycles before you start the combustion
engine again.
X If the combustion engine cannot be started again contact
an authorized Mercedes-Benz Center. c Malfunctio
n The high-voltage system is malfunctioning. In addition an
acoustic warning sounds.
X
Contact an authorized Mercedes-Benz Center immediately. 26
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Display messages
Possible causes/consequences and
X Solutionsc Malfunctio
n Service
Required The high-voltage system is malfunctioning. In addition an
acoustic warning sounds.
X
Drive with added caution to the nearest authorized
Mercedes-Benz Center.
The combustion engine cannot be started again, if
R the automatic transmission is set to position neutral
position N or park position P
R the hood is opened
R the bolted cover in the trunk is removed 8 Gas Cap
Open A loss of pressure has been detected in the fuel system. The
fuel cap may not be closed properly or the fuel system may
be leaking.
X
Check the fuel cap.
X If it is not closed properly: Close the fuel cap.
X If it is closed properly: Have the fuel system checked by
an authorized Mercedes-Benz Center. D Power
Steering
Malfunctio
n
See
Operator's
Manual Power assistance for the steering system is not available. A
considerably
higher degree of effort is necessary to steer the
vehicle.
X Check whether you are capable to apply the higher degree
of effort necessary to safely steer the vehicle.
If you are able to steer the vehicle safely:
X Continue driving with added caution.
X Have the system checked at an authorized Mercedes-Benz
Center.
If, in any way, you feel that you are not able to steer the vehicle
safely:
X Stop the vehicle in a safe location as soon as it is safe to
do so.
X Apply the parking brake.
X Do not continue to drive.
X Contact an authorized Mercedes-Benz Center. Practical hints
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What to do if ...
Lamps in instrument cluster
Problem
Possible causes/consequences and
X Solutionsé
The yellow RBS
(Recuperative Brake
System) warning lamp
is on while the
combustion engine is
running. In addition, an
acoustic warning may
sound.
The RBS is malfunctioning.
Risk of accident!
The combustion engine may not turn off automatically.
X
Read and observe messages that may appear in the
multifunction display
(Y page 24).
X Continue driving with added caution.
X Contact an authorized Mercedes-Benz Center. $
(USA only)
J
(Canada only)
The red brake warning
lamp is on while the
combustion engine is
running. An additional
acoustic warning
sounds.
The RBS is malfunctioning.
Risk of accident!
Brake pedal travel may be longer than usual and the braking
behavior of the vehicle may change.
X
Stop the vehicle in a safe location or as soon as it is safe to do
so. Do not continue to drive.
X Contact an authorized Mercedes-Benz Center immediately.
X Read and observe messages that may appear in the
multifunction display

(Y page 24), see Operator’s Manual. The brake fluid level in the brake fluid reservoir is too low.
Risk of accident!
X
Stop the vehicle in a safe location or as soon as it is safe to do
so. Do not continue to drive.
X Contact an authorized Mercedes-Benz Center immediately.
X Read and observe messages that may appear in the
multifunction display

(Y page 24), see Operator’s Manual.
Do not add brake fluid. This will not solve the problem. d
The yellow ABS/ESP
®
warning lamp flashes
while driving. The ESP
®
,
the 4-ETS, or the ABS has come into operation because
of detected traction loss for at least one wheel.
Risk of accident!
The cruise control is deactivated.
X When driving off, apply as little throttle as possible.
X While driving, ease up on the accelerator pedal.
X Adapt your speed and driving to the prevailing road and weather
conditions.
X Do not switch off the ESP ®
.
Exceptions, see Operator’s Manual. Practical hints
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Problem
Possible causes/consequences and
X SolutionsThe warning and
indicator lamps in the
instrument cluster fail
to come on when
switching on the
ignition. The 12-volt battery and/or the high-voltage battery are
discharged.
X
Charge the 12-volt battery (Y page 32).
or
X Get a jump start (Y page 33).
or
X Contact an authorized Mercedes-Benz Center. Combustion engine
Problem
Possible causes/consequences and
X SolutionsThe combustion engine
cannot be started. The
warning and indicator
lamps
in the instrument
cluster come on when
switching the ignition. The high-voltage battery is discharged.
The discharged high-voltage battery is being charged with the
ignition switched on while the vehicle is being jump started
(Y page 33).
X
Read and observe messages that may appear in the
multifunction display

(Y page 24). The combustion engine
cannot be started. The
multifunction display
does not display any
messages. The self-diagnosis has not been completed yet or the HYBRID
system is malfunctioning.
X
Switch off the ignition and switch it back on.
X Try to start the combustion engine once more.
X If the combustion engine cannot be started: Contact an
authorized Mercedes-Benz Center. RBS (Recuperative Brake System)
Problem
Possible causes/consequences and
X SolutionsLess brake pedal
pressure is required
and the brake pedal
travel is longer than
usual.
X
Apply the brake pedal fully and release it.
The required brake pedal pressure and the brake pedal travel
are back to normal. The RBS is malfunctioning.
Risk of accident!
X
Read and observe the messages in the multifunction display
(Y

page 24) and the notes on warning and indicator lamps in the
instrument cluster (Y page 29). 30
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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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Weights ΜL 450 HYBRID
Roof load
max. 220 lb (100 kg)
Rims and tires
i The ML 450 HYBRID does not have a spare wheel.
Vehicles equipped with 19" wheels come with MOExtended tires. MOExtended tires have
run-flat
characteristics. The 17" and 18" wheels listed in this section do not have tires with
such run-flat characteristics. When replacing factory-equipped 19" wheels with 17" or 18"
wheels, retrofitting with TIREFIT is strongly recommended.
For information on MOExtended tires and TIREFIT, refer to the Operator’s Manual. Model ML 450 HYBRID
17" wheels Rims (light alloy)
Wheel offset
7.5 J x 17 H2
2.21 in (56 mm)
All-season tires
3 235/65 R17 104H M+S
Winter tires
3,4 235/65 R17 104H M+S
i Model ML 450 HYBRID
18" wheels Rims (light alloy)
Wheel offset
8 J x 18 H2
2.36 in (60 mm)
All-terrain tires
3,4 255/55 R18 105H M+S
Model ML 450 HYBRID
19" wheels Rims (light alloy)
Wheel offset
8 J x 19 H2
2.36 in (60 mm)
All-season tires
3,5 255/50 R19 107H XL (Extra Load) M+S
MOExtended
Winter tires
3,4,5 255/50 R19 107H XL (Extra Load) M+S
i
MOExtended 3
Radial-ply tires.
4 Not available as factory equipment.
5 Must

be used in conjunction with Advanced Tire Pressure Monitoring System (U.S. vehicles) or tire pressure
loss warning system (Canada vehicles) only. Technical data
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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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