2009 MERCEDES-BENZ GL SUV key battery

Problem
Possible causes/consequences and
X XSolutions The engine cannot be
started using the key. The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating* or inte-
rior lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 272).
or
X Jump-start the vehicle (Y page 276).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS
GO*. The key is in the
vehicle. A door is open. Therefore, the key cannot be detected as easily.
X
Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves.
X
Start your vehicle using the key in the ignition lock. Trailer towing*
Problem
Possible causes/consequences and
X XSolutions The ball coupling can-
not be locked.
The key cannot be
removed from the ball
coupling.
G
Risk of accident
The ball coupling is dirty.
The trailer coupling is damaged.
X Remove the ball coupling and clean it (Y page 203). If the ball
coupling still cannot be locked, remove the ball coupling. It must
no longer be used to tow a trailer, as safe operation is not guar-
anteed.
X Have the entire trailer coupling checked at a qualified specialist
workshop. 248
TroubleshootingPractical advice
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X
Press resetting tool :downwards until
you hear the head restraint deployment
mechanism engage.
X Pull out resetting tool :.
X Firmly press back the head restraint cush-
ion until it engages =.
X Repeat this procedure for the second head
restraint. Replacing batteries (key and remote
control) Notes
It is advisable to have the batteries replaced
at a qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre. G
Risk of poisoning
Batteries contain toxic and caustic substan-
ces. For this reason, keep batteries away from
children.
If a battery is swallowed, consult a doctor
immediately. H
Environmental note
Do not dispose of batteries with the house-
hold rubbish. They contain highly toxic sub-
stances.
Take discharged batteries to a qualified spe-
cialist workshop, e.g. a Mercedes-Benz
Service Centre, or to a special collection point
for old batteries. Key
Checking the batteries X
Press the &or% button.
The batteries are in working order if the
battery charge indicator lamp lights up
briefly. Changing batteries (key with KEYLESS
GO*) You require two CR 2025 3 V cell batteries.
X
Remove the emergency key element from
the key (Y page 250). X
Insert emergency key element :into the
opening in the key and push in the direction
of the arrow.
Battery tray ;is released.
X Pull battery tray ;out of the key. X
Remove old batteries :from the battery
tray.
X Insert the new batteries beneath the con-
tact spring with the positive pole facing
upwards. Use a lint-free cloth to do so.
X Push the battery tray back into the key
housing until the battery tray engages.
X Check the function of all key buttons on the
vehicle. Replacing batteries (key and remote control)
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Changing a battery (key without KEY-
LESS GO*) You require a CR 2025 3 V cell battery.
X Remove the emergency key element from
the key (Y page 250). X
Press the emergency key element into the
opening in the key in the direction of
arrow ;until cover :of the battery tray
opens. Be sure that your fingers are not
stopping the cover from opening. X
Remove the cover of the battery tray.
X Repeatedly tap the key against your palm
until battery =falls out of the key.
X Insert the new battery with the positive
pole facing upwards. Use a lint-free cloth to
do so.
X Insert the front tabs of the battery tray's
cover first and then press to close it.
X Check the function of all key buttons on the
vehicle. Auxiliary heating* remote control
One 6 V pin battery, type 2CR11108 is
required. X
Prise apart the side arms of battery
cover ;and pull off battery cover ;.
X Remove old battery :.
X Insert the new battery. Observe the polarity
signs on the back of the remote control
when doing so.
X Slide battery cover ;back onto the
remote control.
X Use the remote control to check the vehi-
cle's auxiliary heating functions. Changing bulbs
Notes on changing bulbs
i If you need assistance in changing the
bulbs, contact a qualified specialist work-
shop which has the necessary specialist
knowledge and tools to carry out the work
required. Mercedes-Benz recommends
that you use a Mercedes-Benz Service
Centre for this purpose. In particular, work
relevant to safety or on safety-related sys-
tems must be carried out at a qualified spe-
cialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp settings checked regu-
larly. Only use the types of bulbs specified 254
Changing bulbsPractical advice
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R
never touch the battery first. To discharge
a possible electrostatic charge, step out of
the vehicle first and touch the bodywork.
R do not wipe the battery using a cloth. The
battery may explode as a result of electro-
static charge or due to flying sparks.
! Before loosening the terminal clamps of
the battery, switch off the engine and
remove the key or, on vehicles with KEY-
LESS GO*, make sure that the ignition is
not switched on. In the instrument cluster,
all of the indicator lamps must be out. Oth-
erwise, you may destroy electronic compo-
nents, such as the alternator.
i Mercedes-Benz recommends that you
have work involving the battery, e.g.
removal, charging and replacement, car-
ried out at a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre.
The battery is located under the front seat on
the right-hand side when viewed in the direc-
tion of travel. Disconnecting the battery
G
Risk of accident
If the battery is disconnected:
R the brake boosting effect will not be avail-
able. Greater braking force will then be
required and brake pedal travel will be lon-
ger. If necessary, depress the brake pedal
with maximum force.
R the transmission is locked in position P
! Always disconnect the battery in
the order described below. Never swap the
battery terminals. You may otherwise dam-
age the vehicle electronics. X
Firmly depress the parking brake and move
the transmission to position P.
X Position the right-hand front seat as far for-
wards as possible.
X Switch off all electrical consumers (e.g.
radio, blower, etc.). X
Get into the rear compartment.
X Remove battery cover :under the right-
hand front seat. X
Use a sharp knife on carpet ;to cut along
the dashed white line until you reach the
perforated part.
X Position the right-hand front seat at its rear-
most position. Battery
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X
Fold the piece of cut carpet ;in the direc-
tion of the arrow.
X Adjust the right-hand front seat to its high-
est position.
X Position the right-hand front seat as far for-
wards as possible.
X Turn the key to 0(Y page 63) in the ignition
lock and remove it or make sure that no
ignition position has been selected with
KEYLESS GO*. In the instrument cluster, all
of the indicator lamps must be out. X
Remove fastening clip ?.
X Remove air duct =by pulling it in the
direction of the arrow. X
Remove protective cover Afrom battery
B. X
Disconnect negative terminal clamp D
from the battery and put it down so that it
does not touch positive terminal clamp C.
X Remove the cover from positive terminal
clamp C.
X Remove positive terminal clamp Cfrom
the battery. Removing the battery
X Disconnect the battery ( Ypage 273). 274
BatteryPractical advice
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It is better to have the vehicle transported
than to have it towed.
When towing, observe the legal requirements
in all countries concerned.
! When towing, pull away slowly and
smoothly. If the tractive power is too high,
the vehicles could be damaged.
! Do not use the towing eye for recovery,
as this could damage the vehicle. If in
doubt, recover the vehicle with a crane.
! You may tow the vehicle for a maximum
of 50 km. A towing speed of 50 km/h must
not be exceeded.
For towing distances over 50 km, the entire
vehicle must be lifted up and transported.
! On vehicles with KEYLESS GO*, use the
key instead of the Start/Stop button. Turn
the key to position 2in the ignition lock and
shift the automatic transmission to N. Then
turn the key back to 0and leave it in the
ignition lock.
! Only secure the tow cable or towing bar
to the towing eyes. You could otherwise
damage the vehicle.
R Tow-starting the vehicle is not permitted.
R The vehicle may not be towed with the front
or rear axle raised.
R If the vehicle has suffered transmission
damage, have it carried away on a trans-
porter or trailer.
R If the engine does not start, try jump-start-
ing it (Y page 276).
R If it is not possible to jump-start the vehicle,
have it towed to the nearest qualified spe-
cialist workshop, e.g. a Mercedes-Benz
Service Centre.
R If you are towing the vehicle, move the
automatic transmission selector lever to N
and turn the key to position
2 (Y page 63) in the ignition lock.
R Before towing the vehicle, make sure that
the battery is connected and charged. Oth-
erwise:
- you cannot switch on the ignition.
- you cannot shift the transmission to posi-
tion N.
- you have no support when braking.
i Switch off the automatic locking feature
before the vehicle is towed (Y page 107).
Otherwise, you could be locked out when
pushing or towing the vehicle.
Deactivate tow-away protection*
(Y page 55) before the vehicle is towed. Fitting the towing eye
Vehicles with a trailer tow hitch*: if you
intend to use the vehicle for towing, fit the ball
coupling and connect the towbar to this.
Opening the covers The mountings for the removable towing eyes
are located in the bumpers. They are located
at the front and rear behind covers. 278
Towing and tow-startingPractical advice
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