Mercedes-Benz S 320 1999, Owner'S Manual

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If the battery is discharged, the
engine should be started with
jum per cables and the (12 V)
battery of another vehicle.
The battery is located in the trunk
behind the right-hand cover panel.
Proceed as follows:
1. Position the vehicle with the
charged battery so that the
jum per cables will reach, but
never let the vehicles touch.
Make sure the jum per cables do
not have loose or missing
insulation.
2. On both vehicles:
• Turn off engine and all lights
and accessories, except
hazard warning flashers or
work lights.
• Apply parking brake and shift
selector lever to position “ P”.
Important!
3. Clamp one end of the first
jumper cable to the positive
(+) terminal of the discharged
battery and the other end to the
positive (+) terminal of the
charged battery. Make sure the
cable clamps do not touch any
other metal parts.
4. Clamp one end of the second
jumper cable to the grounded
negative (-) terminal of the
charged battery and the final
connection to the negative
(-) terminal of the discharged
battery.
Important!
5. Start engine of the vehicle with
the charged battery and run at
high idle. Make sure the cables
are not on or near pulleys, fans,
or other parts that will move
when the engine is started.
Allow the discharged battery to
charge for a few minutes. Start
engine of the disabled vehicle in
the usual manner.
6. After the engine has started,
remove jum per cables by
exactly reversing the above
installation sequence, starting
with the last connection made
first. When removing each
clamp, make sure that it does
not touch any other metal while
the other end is still attached.
Important!
A discharged battery can freeze at
approx. +14°F (-10°C ). In that
case, it must be thawed out before
jumper cables are used. A frozen
battery can explode and cause
personal injury.
Jumper cable specifications:
• Minimum cable cross-section of
25 mm2 or approx. 2 AWG
• Maximum length of 11.5 ft.
(3.5 m).
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