2010 MERCEDES-BENZ CL CLASS key battery

Vehicle equipment ............................
412
Where will I find ...? .......................... 412
Vehicle status messages in the
multifunction display ....................... 414
What to do if … .................................. 450
Unlocking/locking manually ...........460
Replacing SmartKey batteries ......... 461
Replacing bulbs ................................. 463
Replacing wiper blades ....................464
Flat tire .............................................. 465
Battery ............................................... 469
Jump starting .................................... 471
Towing the vehicle ............................473
Fuses .................................................. 476 411Practical hints
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Display messages
Possible causes/consequences and
X SolutionsE Shift to P You have attempted to turn off the engine with the KEYLESS-
GO start/stop button and opened the driver’s door with the
automatic transmission not shift to park position
P.
X Shift the automatic transmission to park position P
(Y page 291).
or
X Close the driver’s door. Â Key
Detected
In Vehicle A SmartKey with KEYLESS-GO left in the vehicle was
recognized while trying to lock the vehicle from the outside.
X
Take the SmartKey out of the vehicle. Â Don’t
Forget
Your Key This message appears for a maximum of 60 seconds if the
driver’s door is opened with the engine turned off and no
SmartKey in the starter switch. This message is only a
reminder.
X
Take the SmartKey with you when leaving the vehicle. Â Take Your
Key From
Ignition You have forgotten to remove the SmartKey.
X
Remove the SmartKey from the starter switch. Â Obtain a
New Key The SmartKey with KEYLESS-GO must be replaced.
X
Contact an authorized Mercedes-Benz Center. Â Close
Doors to
Lock
Vehicle You tried to lock the vehicle but not all doors were closed.
X
Close doors and lock the vehicle again. Â Key Does
Not
Belong to
Vehicle The SmartKey in the starter switch does not belong to the
vehicle.
X
Remove the SmartKey from the starter switch. Â Replace
Key
Battery The batteries in the SmartKey with KEYLESS-GO are
discharged.
X
Replace the batteries ( Y page 461).440
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G
Warning!
Batteries contain poisonous and corrosive
substances. Therefore, keep the batteries out
of reach of children.
If a battery is swallowed, seek medical help
immediately. G
Warning!
SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Check with
your local government’s disposal guidelines.
California residents, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Batteries contain materials that can harm the
environment if disposed of improperly.
Recycling of batteries is the preferred method
of disposal. Many states (USA only) or
provinces (Canada only) require sellers of
batteries to accept old batteries for recycling.
When inserting the batteries, make sure they
are clean and free of lint.
When replacing batteries, always replace
both batteries.
i The required replacement batteries are
available at any authorized Mercedes-Benz
Center.
Replacement batteries: Lithium, type
CR 2025 or equivalent.
X Remove the mechanical key from the
SmartKey (Y page 460). SmartKey
X
Press mechanical key ; into the SmartKey
opening until battery compartment
cover : opens. Do not keep the cover
shut. X
Remove the battery compartment cover.
X Pat the SmartKey against the palm of your
hand until battery = falls out.
X Insert the new battery with the positive
terminal (+) facing up. Use a lint-free cloth.
X Insert the tabs of the battery compartment
cover into the housing and press the cover
closed.
X Slide mechanical key : back into the
SmartKey.
X Check the operation of the SmartKey. 462
Replacing SmartKey batteriesPractical hints
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SmartKey with KEYLESS-GO
X
Insert mechanical key : into opening.
X Press mechanical key : in direction of
arrow.
Battery compartment ; is unlatched.
X Pull battery compartment ; out of the
SmartKey housing. X
Pull out batteries =.
X Insert new batteries = under contact
springs ? with the positive terminal (+)
side facing up.
X Return battery compartment ; into
SmartKey housing until it locks into place.
X Slide mechanical key : back into the
SmartKey.
X Check the operation of the SmartKey as
well as the KEYLESS-GO function. Replacing bulbs
Safety notes
Safe vehicle operation depends on proper
exterior lighting and signaling to a large
degree.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals. Contact an
authorized Mercedes-Benz Center for
headlamp adjustment. G
Warning!
The bulbs in the tail lamps cannot be replaced
individually. The tail lamp bulbs are under
pressure and could explode during an attempt
to replace them.
If the tail lamps are malfunctioning, have them
replaced at an authorized Mercedes-Benz
Center.
i If the headlamps or front fog lamps are
fogged up on the inside as a result of high
humidity, driving the vehicle a distance with
the lights on should clear up the fogging. Replacing bulbs for front lamps
G
Warning!
Do not remove the cover for the Bi-Xenon
headlamp. Because of high voltage in Xenon
lamps, it is dangerous to replace the bulb or
repair the lamp and its components. It is
recommended to have such work done by a
qualified technician.
i Replacing the bulbs for the front lamps is
a technically complex process. Have such
work done by an authorized Mercedes-
Benz Center. Replacing bulbs
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Recycling of the battery is the preferred
method of disposal. Many states (USA only)
or provinces (Canada only) require sellers of
batteries to accept the old battery for
recycling.
G
Warning!
Failure to follow these instructions can result
in severe injury or death.
Never lean over batteries while connecting.
You might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc. G
Warning!
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof
batteries only to avoid the risk
of acid burns in the event of an accident.
Take care that you do not become statically
charged, e.g. by wearing synthetic clothing or
rubbing against textiles. For this reason, you
also should not pull or push the battery over
carpets or other synthetic materials.
Never touch the battery first. First touch the
outside body of the vehicle in order to release
any possible electrostatic charges.
Do not rub the battery with rags or cloths. The
battery could explode if touched due to
electrostatic charge or due to spark
formation.
! The battery is a Valve- Regulated Lead
Acid (VRLA) battery, also referred to as
“fleece” battery.
Such
batteries

do not require topping-up of
the electrolyte level. VRLA batteries
therefore do not have cell caps and the battery cover is non-removable. Do not
attempt to open the battery as otherwise
the battery will be damaged.
VRLA batteries

do not require topping-up of
the electrolyte level. They cannot be
opened to check the electrolyte level.
However, the battery condition must be
checked periodically by performing a
battery conductance test. Refer to
Maintenance Booklet for battery condition
testing intervals.
The factory-equipped battery may only be
replaced with a battery that
R has the same security features
R is of identical size
R is of identical voltage
R is of identical capacity
! As any other battery, the battery may
discharge if you do not operate the vehicle
for an extended period of time. Have the
battery disconnected at a qualified
workshop or an authorized Mercedes-Benz
Center in such a case. You may also
connect an accessory battery charge unit
expressly approved by Mercedes-Benz for
your vehicle model to maintain the battery
charge. Contact an authorized Mercedes-
Benz Center for further information.
The battery, the battery ventilation hose
and the lateral plug must always be
securely installed when the vehicle is in
operation.
! Switch off the engine and switch off the
vehicle’s internal electrical functions
before you disconnect or remove the
battery’s terminal clamps. You could
otherwise destroy electronic assemblies
such as the generator.
Remove SmartKey from starter switch
(vehicles with KEYLESS-GO: Make sure the
vehicle’s on-board electronics have status 0)
when you turn off the engine and no longer
require any electrical consumers. The vehicle 470
Battery
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then uses very little power and the battery is
spared.
If
the
battery is discharged, you must use the
mechanical key to unlock the vehicle. Charging the 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.
Charge battery in accordance with the
separate instructions for the accessory
battery charger.
Have the battery charged at an authorized
Mercedes-Benz Center. If you charge the
battery yourself, follow the operating
instructions for your charging device.
Only use a battery charge unit with a
maximum charging voltage of 14.8 V.
X Charge battery in accordance with the
instructions of the battery charger
manufacturer. Jump starting
G
Warning!
Failure to follow these directions will cause
damage to the electronic components, and
can lead to a battery explosion and severe
injury or death. Never lean over batteries while connecting or
jump starting. You might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water, and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
Attempting
to

jump start a frozen battery can
result in it exploding, causing personal injury.
Read all instructions before proceeding.
! Do not tow-start the vehicle. You could
otherwise seriously damage the automatic
transmission which is not covered by the
Mercedes-Benz Limited Warranty.
! 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.
Make sure the cable clamps do not touch
any other metal part while the other end is
still attached to a battery. Jump starting
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X
Connect positive terminal : of charged
battery A with
positive terminal ; with a
jumper cable. Clamp the cable to positive
terminal : of charged battery A first.
X Start engine of the vehicle with charged
battery A and run at idle speed.
X Connect negative terminal = of charged
battery A with negative terminal ? with
a jumper cable. Clamp the cable to
negative terminal = of charged battery
A first.
X Start engine of the vehicle with the
discharged battery and run at idle speed.
You can now turn on the electrical
consumers. Do not switch on the
headlamps under any circumstances.
X Remove the jumper cables from negative
terminals = and ? first.
X Remove the jumper cables from positive
terminals : and ;.
You can now switch on the headlamps.
X Have the battery checked at the nearest
authorized Mercedes-Benz Center. Towing the vehicle
Safety notes
G
Warning!
The vehicle is braked when the HOLD function
or DISTRONIC PLUS is activated. Therefore,
deactivate the HOLD function or DISTRONIC
PLUS if the vehicle is to be towed.
Mercedes-Benz recommends

that the vehicle
be transported with all wheels off the ground
using flatbed or appropriate wheel lift/dolly
equipment. This method is preferable to other
types of towing.
! To prevent damage during transport, do
not tie down vehicle by its chassis or
suspension parts.
If circumstances do not permit the
recommended towing methods, the vehicle
may be towed with all wheels on the ground or front axle raised (except vehicles with
4MATIC) only

so far as necessary to have the
vehicle moved to a safe location where the
recommended towing methods can be
employed.
! Before towing the vehicle observe the
following instructions:
R Do not tow-start the vehicle. You could
otherwise seriously damage the
automatic transmission which is not
covered by the Mercedes-Benz Limited
Warranty.
R Do not tow with sling-type equipment.
Towing with sling-type equipment over
bumpy roads will damage radiator and
supports.
R Towing of the vehicle should only be
done using the properly installed towing
eye bolt. Never attach a tow cable, tow
rope or tow rod to the vehicle chassis,
frame or suspension parts. G
Warning!
With the engine not running, there is no power
assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle. Adapt your driving accordingly.
! Avoid pulling the vehicle abruptly or
diagonally, since it could result in damage
to the chassis alignment.
! Do not use the towing eye bolt for
recovery, as

this could damage the vehicle.
If in doubt, recover the vehicle with a crane.
i If the battery is disconnected or
discharged
R the SmartKey will not turn in the starter
switch
R the automatic transmission will remain in
park position P Towing the vehicle
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