AUX MERCEDES-BENZ E320 2003 W211 Owner's Manual

266 OperationEngine compartmentBattery
Your vehicle is equipped with two batter-
ies:

Auxiliary battery (located in the engine
compartment).


Main battery (starter and electrical
consumers; located in the trunk).
These batteries should always be suffi-
ciently charged in order to achieve their
rated service life.
If you use your vehicle mostly for short dis-
tance trips, you will need to have the bat-
tery charge checked more frequently.
When replacing batteries, always use bat-
teries approved by Mercedes-Benz.
If you do not intend to operate your vehicle
for an extended period of time, consult an
authorized Mercedes-Benz Center about
steps you need to observe.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
G
Observe all safety instructions
and precautions when handling
automotive batteries.
A
Risk of explosion
D
Keep flames or sparks away
from battery. Do not smoke.
B
Battery acid is caustic. Do not
allow it to come into contact
with skin, eyes or clothing.
In case it does, immediately
flush affected area with clear
water and seek medical help if
necessary.
E
Wear eye protection.
C
Keep children away.
F
Follow the instructions in this
Operator's Manual.

343 Practical hints
Batteries
Batteries
Your vehicle is equipped with two batter-
ies:

Auxiliary battery (back-up battery; en-
ables vehicle to shut down electrical
systems in a controlled manner should
the main battery fail; auxiliary battery is
located in the engine compartment)


The main battery (battery for starter
and electrical consumers; located in
the trunk).The main battery is in the trunk under the
luggage box. Remove the luggage box
(
page 325).
Main battery in trunk1Negative terminal
2Positive terminalWarning!
G
Jump starting must only be done using the
main battery in the trunk.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
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.

363 Technical data
Electrical system
Electrical system
Model
E320
E500
Generator (alternator)
14 V/120 A
14 V/120 A
Starter motor
14 V/1.4 KW
14 V/1.7 KW
Battery (auxiliary)
12 V/12 Ah
12 V/12 Ah
Battery (main)
12 V/95 Ah
12 V/95 Ah
Spark plugs
Bosch F8 DPP 332U
NGK PFR 5R-11
Bosch F8 DPP 332U
NGK PFR 5R-11
Electrode gap
0.039 in (1.00 mm)
0.039 in (1.00 mm)
Tightening torque
18.5 - 22 ft.lb (25 - 30 Nm)
18.5 - 22 ft.lb (25 - 30 Nm)