Mercedes-Benz SLR McLaren. Operator's Manual.

Practical hints
Batteries
Your vehicle is equipped with two batteries:
The starter battery (located in the
trunk)
The battery for electrical consumers
(located in the trunk)
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Warning! G
Failure to follow these instructions can result
in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
Observe all safety instructions and precautions
when handling automotive batteries
( page 251).
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 affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
!
You must not jump start the vehicle,
otherwise the vehicle electrical systems
could be damaged.
Only use the battery charge unit tested
and approved by Mercedes-Benz for
use on the SLR to charge the battery or
maintain the battery charge. Using other
battery chargers may cause damage
to the vehicle and/or personal injury.
Information on charging the batteries
( page 358).
Have the batteries checked regularly
by an authorized Mercedes-Benz
Center. Refer to Maintenance Booklet
for maintenance intervals or contact an
authorized Mercedes-Benz Center for
further information.
If it is necessary to replace the batteries,
notify an authorized
Mercedes-Benz Center.