Mercedes-Benz 2009 CLK-Class Operator's Manual page 352

Practical hints
Jump starting
! 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
350
in your 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 start the engine if the battery is
R
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, which will
not be covered by the Mercedes-Benz
Limited Warranty.
Only use jumper cables with sufficient
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cross-section and insulated terminal
clamps.
Always make sure the jumper cables are
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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 battery is located on the right side of the
engine compartment. For jump starting, use
the terminals in front of the battery.
X
Make sure the two vehicles do not touch.
X
Turn off all electrical consumers.
X
Apply the parking brake.
X
Make sure the automatic transmission is in
park position P.
X
Open the hood.
X
Flip up cover from positive under hood
terminal in front of the filter box.
2
Positive terminal of charged battery
1
Positive under hood terminal in front of
2
discharged battery
Negative under hood terminal in front of
3
discharged battery
Negative terminal of charged battery
4
! Never invert the terminal connections!