Mercedes-Benz Metris Operator's Manual page 193

Start the engine of the donor vehicle and run it
#
at idling speed.
Start the vehicle and let the engine run for a
#
while.
Before disconnecting the jumper cables,
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switch on an electrical consumer in your own
vehicle, e.g. the rear window heater or the
lighting.
Disconnect the negative terminal clamp of the
#
jumper cable from ground contact
then from negative terminal
battery.
Disconnect the positive terminal clamp of the
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jumper cable from positive terminal
jump-start connection point, and then from
positive terminal 3 of the donor battery.
Contact protection cover
returned forwards to its original position by the
spring force and the jump-start connection
point is closed.
Position the cover on positive terminal
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the donor battery.
Have the battery checked at a quali ed spe-
#
cialist workshop.
Char Charging t ging the 12 V batt he 12 V battery ery
* NO NOTE TE Damage to the electronics due to
unapproved chargers
If you charge an installed battery with a
charger not approved for Mercedes-Benz, the
on-board electronics can be damaged.
Only use a charger approved for
#
Mercedes-Benz which permits charging
in the installed condition.
Only charge the battery via the jump-
#
start connection point.
A battery charger specially adapted for Mercedes-
Benz vehicles and tested and approved for
Mercedes-Benz is available as an accessory.
Further information is available from any
Mercedes-Benz Commercial Van Center. Read the
operating instructions for your charger before
charging the battery.
Recharge the battery more frequently if you use
the vehicle mainly for short trips and/or drive at
low outside temperatures.
Connect the battery charger to the positive ter-
#
minal and ground contact in the same order as
%
12 V batt 12 V batter ery care
* NO
4 and
2 of the donor
Dirty battery clamps and battery surfaces
cause leakage current. This can lead to the
battery discharging.
5 on the
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1 is automatically
* N N O O TE TE Damage to the battery housing due
If you use cleaning agents containing fuel,
these can damage the battery housing.
3 of
#
* N N O O TE TE Damage to the battery through self-
If dirt enters the battery cell, battery self-dis-
charging will accelerate and the battery may
be damaged.
#
Observe the following points on battery care:
#
#
#
Disconnecting and r Disconnecting and remo
& W W ARNING
If there is a short circuit or sparks are created,
there is a danger of hydrogen gas igniting when
you charge the battery.
Breakdown assistance 191
when connecting the donor battery in the
jump-starting procedure.
If a battery is not installed and not in service,
you should charge it every three months. This
helps to counteract self-discharging and pre-
vent damage to the battery.
y care
NOTE TE Battery discharging due to leakage
current
Keep the battery terminals and battery
surfaces clean and dry.
to improper cleaning
Do not use cleaning agents containing
fuel.
discharging
Only clean batteries when the caps are
screwed on.
Regularly check the battery terminals and the
fastening of the negative cable to the chassis
to ensure that they are rmly seated.
Lightly grease the undersides of the battery
terminal clamps with acid-resistant grease.
Only clean the battery housing with commer-
cially available cleaning agents.
emoving t ving the st he start
ARNING Risk of explosion due to the
ignition of hydrogen gas
191
arter batt er battery ery