Mercedes-Benz 2015 GLK Operator's Manual page 324

Battery (vehicle)
322
Allow the frozen battery to thaw out before
charging it or jump-starting.
! 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 in the vehicle.
! Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
! Only charge the battery using the jump-
starting connection point.
The jump-starting connection point is in the
engine compartment (
Open the hood.
X
Connect the battery charger to the positive
X
terminal and ground point in the same
order as when connecting the donor bat-
tery in the jump-starting procedure
( page 323).
Y
Read the battery charger's operating
X
instructions before charging the battery.
page 323).
Y