2005 MERCEDES-BENZ ML350 key battery

171 Controls in detail
Useful features
Ashtrays and cigarette lighter Ashtray and cigarette lighter in the
front center console
1Ashtray
2Cigarette lighter
3Cover plate
Opening the ashtray

Briefly touch cover plate3.
The ashtray opens automatically.Removing ashtray insert

Secure vehicle from movement by set-
ting the parking brake. Move the gear
selector lever to positionN.
Now you have more room to take out
the insert.

Grip the insert on the sides and pull it
out upwards.
Reinstalling ashtray insert

Install ashtray insert.

Close the ashtray.
Warning!
G
Never touch the heating element or sides of
the cigarette lighter; they are extremely hot.
Hold the knob only.
When leaving the vehicle always remove the
key from the steering lock. Do not leave chil-
dren unattended in the vehicle, or with ac-
cess to an unlocked vehicle. Unsupervised
use of vehicle equipment may cause an ac-
cident and / or serious personal injury.iThe cigarette lighter socket can be
used to accommodate electrical acces-
sories up to a maximum of 50 W.
If the engine is off, the battery may be-
come discharged when used for long
periods of time.
Warning!
G
Remove ashtray only with vehicle standing
still. Set the parking brake to secure vehicle
from movement. Move gear selector lever to
positionN. With gear selector lever in
positionN, turn off the engine.

173 Controls in detail
Useful features
Electrical outletElectrical outletOne outlet is located in the front passen-
ger footwell and another on the right-hand
side of the luggage compartment.
Flip up cover and insert electrical plug
(cigarette lighter type).
Telephone*
Radio transmitters, such as a portable tele-
phone or a citizens band unit, should only
be used inside the vehicle if they are con-
nected to an antenna that is installed on
the outside of the vehicle.
The external antenna must be approved by
Mercedes-Benz. Please contact an autho-
rized Mercedes-Benz Light Truck Center
for information on the installation of an ap-
proved external antenna. Refer to the radio
transmitter operation instructions regard-
ing use of an external antenna.
iThe outlets function even if the key is
not in the ignition.
The electrical outlet can be used to
accommodate electrical consumers
(e.g. air pump, auxiliary lamps) up to a
maximum of 180 W.
If the engine is off, the battery may be-
come discharged if used for long peri-
ods of time.
Warning!
G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and / or serious
personal injury.

238 OperationMaintenanceMaintenance service term exceeded
If you have exceeded the suggested
maintenance service term:

the9 or ½symbol appears in
the display2 for 30 seconds and a
signal sounds after switching on the
ignition.


it is preceded by a “–” (minus symbol).
The Mercedes-Benz Light Truck Center will
reset the maintenance service indicator
following a completed maintenance
service.Calling up the maintenance service
indicator
Within one second press knob1
twice.
The maintenance service indicator dis-
play will appear for ten seconds.Resetting the maintenance service
indicator
In the event that the maintenance service
on your vehicle is not carried out by an au-
thorized Mercedes-Benz Light Truck Cen-
ter, you can reset the maintenance service
indicator yourself.
Switch ignition on and immediately
press knob1 twice within
one second.
The present status for days or distance
is displayed.

Within ten seconds turn the key in
steering lock to position0 (
page 33).

Press and hold knob1 while switch-
ing the ignition on.
The present status for days or distance
is displayed once more.
iIf the battery is disconnected, the days
of disconnection will not be included in
the count shown by the service indica-
tor. To arrive at the true maintenance
service deadline, you will need to sub-
tract these days from the days shown
in the maintenance service indicator.
Do not confuse the maintenance ser-
vice indicator with the engine oil level
indicator:.

247 Practical hints
What to do if …
Where will I find ...?
Unlocking / locking in an emergency
Opening / closing in an emergency
Replacing key batteries
Replacing bulbs
Replacing wiper blades
Flat tire
Battery
Jump starting
Towing the vehicle
Fuses

272 Practical hintsReplacing key batteriesIf the batteries in the remote control are
discharged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck Center.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen replacing batteries, always
replace both batteries.
The required replacement batteries are
available at any Mercedes-Benz Light
Truck Center.

273 Practical hints
Replacing key batteries
Remote control
Replacement batteries: Lithium, type
CR 2025 or equivalent.
1Release button
2Battery cover
Unfold the key by pressing release
button1.

Pull off battery cover2 in direction of
arrow.

Remove the batteries.

Using a lint-free cloth, insert new bat-
teries under the contact spring with the
plus (+) side facing up.

Press battery cover2 onto housing
until locked in place.

Push each button to assure proper op-
eration of the remote control.
If remote control does not function cor-
rectly after replacing the batteries, the
system may have to be resynchronized.Synchronizing remote control

Turn key in steering lock to position2
(page 33), then to position0 and re-
move.

Within ten seconds, push and hold
button‹ while pushing
buttonΠfive times.

Release the button, and press‹,
Œ orŠ once.
The remote control is resynchronized.

Recheck all of the remote control func-
tions.
iWhen inserting the batteries, make
sure they are clean and free of lint.
iIf it is not possible to resynchronize the
remote control, have the system
checked at an authorized
Mercedes-Benz Light Truck Center.

288 Practical hintsBatteryThe battery is located on the passenger
side of the engine compartment.
1Negative terminal
2Positive terminal
Warning!
G
Failure to follow these instructions can
result in severe injury or death.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 228).
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.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the key is in the steering lock. Other-
wise the alternator and other electronic
components could be severely dam-
aged.
Have the battery checked regularly by
an authorized Mercedes-Benz Light
Truck Center.
Refer to Maintenance Booklet for main-
tenance intervals or contact an autho-
rized Mercedes-Benz Light Truck
Center for further information.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.

289 Practical hints
Battery
Disconnecting the battery
Depress parking brake firmly or move
gear selector lever to positionP.

Turn off all electrical consumers.

Remove key from the steering lock.

Open the hood (
page 222).

Disconnect the battery negative lead.

Remove the cover from the positive ter-
minal.

Disconnect the battery positive lead.
Removing the battery
Remove the screw securing the
battery.

Remove the battery support and
bracket.

Take out the battery.
Charging and reinstalling the battery
Charge battery in accordance with the
instructions of the battery charger
manufacturer.

Reinstall the charged battery. Follow
the previously described steps in re-
verse order.
Reconnecting the battery
Turn off all electrical consumers.

Connect the positive lead and fasten its
cover.

Connect the negative lead.
Warning!
G
With a disconnected battery

you will no longer be able to turn the key
in the steering lock


the gear selector lever will remain
locked in positionP
Warning!
G
Never charge a battery while still installed in
the vehicle. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
!Never invert the terminal connections!!The battery, its filler caps and the vent
tube must always be securely installed
when the vehicle is in operation.