Mercedes-Benz M-Class Owner's Manual page 350

Switch off all electrical consumers (e.g.
X
radio, blower, etc.).
Connect the positive terminal clamp and
X
secure the cover.
Connect the negative terminal clamp.
X
i
If the power supply has been interrupted,
e.g. if you reconnect the battery, you will
have to:
set the clock; see the separate operating
R
instructions.
reset the function for automatically fold-
R
ing the exterior mirrors in/out by folding
the mirrors out once (
Charging the battery
G
WARNING
Only charge the battery in a well-ventilated
area. As the battery is being charged, gases
can escape and generate minor explosions.
This could 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 while still installed from a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre.
G WARNING
There is a risk of acid burns during the charg-
ing process due to the gases which escape
from the battery. Do not lean over the battery
during the charging process.
G WARNING
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
while still installed.
page 101).
Y
! Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
! Only charge the battery using the jump-
start connection point.
The jump-starting connection point is in the
engine compartment (
Open the bonnet (
X
Y
Connect the battery charger to the positive
X
terminal and earth point in the same order
as when connecting the donor battery in
the jump-starting procedure
( page 348).
Y
Read the battery charger's operating
X
instructions before charging the battery.
Battery
page 348).
Y
page 318).
Z
347