ECU MERCEDES-BENZ ML SUV 2008 Service Manual

Battery
337
X
Disconnect negative terminal clamp 8
from the battery and put it down so that it
does not touch positive terminal clamp
7.
X Remove the cover from positive terminal
clamp 7.
X Remove positive terminal clamp 7from
the battery. Removing the battery
X Disconnect the battery ( Ypage 335). 9
Breather hose
a Securing bolt
b Retainer X
Remove breather hose 9.
X Loosen bolt awhich holds the battery in
place.
i You need a 13 mm socket wrench with at
least a 30 cm shaft.
X Remove bracket b. c
battery
X Lift battery cat the side until the lower
edge is free.
X Pull out battery cin the direction of the
arrow. Charging and fitting the battery
G
Risk of injury
Only charge the battery in a well-ventilated
area. As the battery is being charged, gases
can escape and generate minor explosions.
This may injure you and other persons or
cause damage to the paintwork or acid cor-
rosion on the vehicle.
You can obtain information about battery
chargers which allow the battery to be
charged when still installed from a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. G
Risk of injury
There is a risk of acid burns during the
charging process due to the gases which
escape from the battery. Do not lean over
the battery during the charging process. G
Risk of injury
Battery acid is caustic. Avoid contact with
the skin, eyes or clothing.
! Only charge the installed battery with a
battery charger which has been tested and
approved by Mercedes-Benz. These battery
chargers allow the battery to be charged Practical advice
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Battery
338while it is still installed. Otherwise, the vehi-
cle's electronic system may be damaged.
! Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
X Charge the battery. Observe the notes in
the operating instructions for your battery
charger.
X Refit the charged battery.
To do this, follow the steps described in
"Removing the battery" (Y page 337) in
reverse order.
i You can charge the battery using the
jump-start terminals. These are located on
the right when viewed in the direction of
travel.
X Open the bonnet (Y page 219). Jump-start terminals
1
Body earth point (negative terminal)
2 Positive terminal (under cover) Reconnecting the battery
! Always reconnect the battery in the
sequence described below. Never swap the
terminal clamps. You may otherwise dam-
age the vehicle electronics.
X Switch off all electrical consumers.
X Connect the positive terminal clamp and
secure the cover.
X Connect the negative terminal clamp.
X Connect the breather hose. Make sure that
a cell cap is fitted is fitted on the side. i
If the battery power supply has been inter-
rupted (e.g. if it has been reconnected), you
must carry out the following tasks:
R Set the time (Y page 130).
On vehicles with COMAND and a naviga-
tion system*, the clock is set automati-
cally
R Reset the sliding/tilting sun-
roof* (Y page 189).
R Reset the function for folding the exterior
mirrors in/out automatically* by folding
the mirrors out once ( Ypage 86).
R Reset the side windows (Y page 101)Practical advice
* optional
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Towing and tow-starting
340
X
Electrical consumers can be switched on
again. Do not switch the lights on, however,
as this will overload the battery.
X First, remove the jump lead from earth
point 2and negative terminal 4, then
from positive terminal 1and positive ter-
minal 3, each time disconnecting from the
battery on your own vehicle first.
i The message Battery protection:
some convenience functions cur-
rently not available may appear in the
multi-function display. It disappears as
soon as the battery is sufficiently charged.
X Have the battery checked at a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. Towing and tow-starting
Points to remember
G
Risk of accident
If you tow the vehicle, you must use a rigid
towing bar if:
R the engine is not running
R there is a brake system malfunction
R the voltage supply or the vehicle's elec-
trical system is damaged
The electric power steering and the brake
force booster do not work when the engine
is not running. Greater braking force will
then be required and the brake pedal travel
will be longer. If necessary, depress the
brake pedal with maximum force.
Do not tow the vehicle if the key cannot be
turned in the ignition lock. If this is the case,
the steering is locked and the vehicle can-
not be steered.
If you tow or tow-start another vehicle, its
weight must not exceed the maximum per-
missible gross vehicle weight of your vehi-
cle.
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 with-
out jerking. If the tractive power is too high,
the vehicles could be damaged.
! Do not use the towing eye for recovery,
as this will 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.
With towing distances over 50 km, the
entire vehicle needs to be lifted up and
transported.
! On vehicles with KEYLESS GO*: use the
key instead of the KEYLESS GO * button.
Turn the key to position 2in the ignition
lock and set 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 may otherwise
damage the vehicle. Practical advice
* optional
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Towing and tow-starting
342
Vehicles with the off-road styling pack-
age* 1
Cover
X Use a suitable object such as a screwdriver
to prise off and remove cover 1at the
recess.
Securing the towing eye X
Take the towing eye and the wheel wrench
from the vehicle tool kit ( Ypage 255).
X Screw in the towing eye clockwise to the
stop.
X Insert the wheel wrench handle into the
towing eye and tighten it. Towing the vehicle
! You may tow the vehicle for a maximum
of 50 km. A towing speed of 50 km/h must
not be exceeded.
With towing distances over 50 km, the
entire vehicle needs to be lifted up and
transported.
! You should not have the vehicle towed
with the front or rear axle raised.
X Turn the key to position 2(Y page 75) in
the ignition lock.
i On vehicles with KEYLESS GO*: use the
key instead of the KEYLESS GO * button.
X Move the DIRECT SELECT lever to the N
position. Removing the towing eye
X Take the wheel wrench from the vehicle
tool kit ( Ypage 255).
X Insert the wheel wrench handle into the
towing eye and turn it anti-clockwise.
X Unscrew the towing eye.
X Replace the cover and press it until it
engages.
X Return the towing eye and the wheel
wrench to the vehicle tool kit. Transporting the vehicle
The towing eyes or trailer coupling *can be
used to pull the vehicle onto a trailer or trans-
porter if you wish to transport it.
! Only lash the vehicle down by the wheels
or wheel rims, not by parts of the vehicle
such as axle or steering components. The
vehicle could otherwise be damaged. Practical advice
* optional
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Fuses
345
X
To close: check whether the rubber seal is
lying correctly in lid 1.
X Insert lid 1at the rear of the fuse box into
the retainer.
! The cover must be fitted properly, other-
wise moisture or dirt could affect the oper-
ation of the fuses.
X Fold down lid 1and secure with clamps
2.
X Close the bonnet (Y page 220). Fuse box in the luggage compartment
1
Catches
2 Cover X
To open: open the tailgate.
X Turn catches 1in the direction of the
arrow.
X Open cover 2downwards. Practical advice
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