Mercedes-Benz 2013 GLS Class - Manual (Page 364)

The jump-starting connection point is in the
engine compartment (
Y page 363).
X Open the bonnet ( Y page 336).
X Connect the battery charger to the positive
terminal and earth point in the same order
as when connecting the donor battery in
the jump-starting procedure
(
Y page 363).
If the indicator/warning lamps do not light up
at low temperatures, it is very likely that the
discharged battery has frozen. In this case,
you may neither charge the battery nor jump-
start the vehicle. The service life of a battery
that has been thawed could be reduced. The
starting characteristics may be impaired,
especially at low temperatures. Have the
thawed battery checked at a qualified spe-
cialist workshop.
Never charge a battery still installed in the
vehicle unless a battery charger unit
approved by Mercedes-Benz is being used. A
battery charger unit specially adapted for
Mercedes-Benz vehicles and tested and
approved by Mercedes-Benz is available as an
accessory. It permits the charging of the bat-
tery in its installed position. Contact a
Mercedes-Benz Service Centre for informa-
tion and availability. Read the battery charg-
er's operating instructions before charging
the battery.
362
Battery (vehicle)
Breakdown assistance