Mercedes-Benz 2009 S-Class Operator's Manual page 581

! 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
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
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.
X
Make sure the two vehicles do not touch.
X
Switch off all electrical consumers.
X
Engage the electronic parking brake.
Practical hints
Jump starting
X
Make sure the automatic transmission is in
park position P.
X
Open the hood.
Negative clamp
1
Negative terminal of charged battery
2
Positive terminal of charged battery
3
Positive terminal of discharged battery
4
! Never invert the terminal connections!
X
Connect positive terminals
the batteries with a jumper cable. Clamp
the cable to positive terminal
charged battery first.
X
Connect negative terminal
2
battery with a jumper cable and attach
other end of the jumper cable with the
and of
3 4
of the
3
of charged
Z
579