Mercedes-Benz 300D 2.5 1990, Owner'S Manual

Page: 92 / 121

Important!
3. Clamp one end of the first jum per
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
jum per 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 jum per cables by reversing
the above installation sequence
exactly, starting with the jum per
cable connected to a heavy metal
bracket in the disabled vehicle’s
engine compartment. 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. -1 0 °C (+14°F). In that case it
must be thawed out before jum per
cables are used.
Jum per cable specifications:
• Minimum cable cross-section of
25 mm2 or approx. 2 AWG
• Maximum length of 3500 mm
(11.5 ft).
W arning!
Never lean over batteries while
connection or jum p starting, you
might get burned.
Battery fluid contains sulfuric
acid. Do not allow this fluid to
com e in contact with eyes, skin,
or clothing. In case it does,
im mediately flush affected area
with water, and seek medical
help.
A battery will also produce hydro­
gen gas, which is flam m able and
explosive. Keep flam es or sparks
away from battery, avoid im­
proper connection of jum per
cables, smoking, etc..
Batteries contain enough electri­
city to burn you. Never touch
uninsulated battery connections.
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