Mercedes-Benz 300 E 1990 Owner's Manual page 95

• Apply parking brake and
shift selector lever to posi­
tion " P" .
• Be sure the battery vent
caps are tight. Place a damp
cloth over the vent caps,
making certain it is clear of
all moving parts.
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 a grounded
heavy metal bracket in the
engine compartment or on the
engine of the disabled vehicle.
Make sure the cables are not
on or near pulleys, fans, or
other parts that will move when
the engine is started.
5. Start engine of the vehicle with
the charged battery and run at
high idle. Then start engine of
the disabled vehicle in the
usual manner.
6. After the engine has started,
remove jumper cables by re­
versing the above installation
sequence exactly, starting with
the jum per cable connected to
a heavy metal bracket in the
disabled vehicle's engine com­
partment. 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. - 10°C (+ 14°F). In that
case it must be thawed out before
jum per cables are used.
Jumper cables specifications:
• Minimum cable cross-section of
25 mm2 or approx. 2 AWG
• Maximum length of 3500 mm
(11.5 ft).
Warning!
Never lean over batteries while
connecting or jump starting,
you might get burned.
Battery fluid contains sulfuric
acid. Do not allow this fluid to
come in contact with eyes,
skin, or clothing. In case it
does, immediately flush af­
fected area with water, and
seek medical help.
A battery will also produce
hydrogen gas, which is flam­
mable and explosive. Keep
flames or sparks away from
battery, avoid improper con­
nection of jumper cables,
smoking, etc..
Batteries contain enough
electricity to burn you. Never
touch uninsulated battery
connections.