Mercedes-Benz 2010 GLK-Class Operator's Manual page 322

Jump starting
320
transmission which is not covered by the
Mercedes-Benz Limited Warranty.
! Jump starting should only be performed
using the jump-start terminals located in
the engine compartment.
Avoid repeated and lengthy starting
attempts.
Do not attempt to start the engine using a
battery quick-charge unit.
If the engine does not run after several
unsuccessful starting attempts, have it
checked at the nearest authorized
Mercedes-Benz Center.
Excessive unburned fuel generated by
repeated failed starting attempts may
damage the catalytic converter and may
present a fire risk.
Make sure the jumper cables do not have
loose or missing insulation.
Make sure the cable clamps do not touch
any other metal part while the other end is
still attached to a battery.
If the battery is discharged, the engine can be
started with jumper cables and the fully
charged battery of another vehicle or an
equivalent starter pack. Observe the
following:
Access to the battery is not possible on all
R
vehicles. If you cannot access the battery
of the other vehicle, provide jump start
power by an external battery or starter
pack.
Jump starting should only be performed
R
when the engine and catalytic converter
are cold.
Do not jump start the engine or charge the
R
battery if the battery is frozen. Let the
battery thaw out first.
Only jump start from batteries with the
R
same voltage rating (12 V). Jump starting
with a more powerful battery could damage
the vehicle's electrical system. Such
damage will not be covered by the
Mercedes-Benz Limited Warranty.
Only use jumper cables with sufficient
R
cross-section and insulated terminal
clamps.
Always make sure the jumper cables are
R
not on or near pulleys, fans or other parts
that move when an engine is started or
running.
Should the battery be drained completely,
R
let the donating power source charge the
vehicle for several minutes before
reattempting the starting process.
The jump-start contacts are located in the
engine compartment on the passenger side.
X
Make sure the two vehicles do not touch.
X
Switch off all electrical consumers.
X
Engage the parking brake.
X
Make sure the automatic transmission is in
park position P.
X
Open the hood ( Y page 214).