Page 297 of 506

295 Operation
Driving instructions
Standing water
Passenger compartmentDriving abroad
Abroad, there is an extensive 
Mercedes-Benz service network at your 
disposal. If you plan to drive into areas 
which are not listed in the index of your 
Mercedes-Benz Center directory, you 
should request pertinent information from 
your authorized Mercedes-Benz Center.Control and operation of radio trans-
mitter
COMAND, radio and telephone*
!Do not drive through flooded areas or 
water of unknown depth. Before driving 
through water, determine its depth. 
Never accelerate before driving into 
water. The bow wave could force water 
into the engine and auxiliary equip-
ment, thus damaging them. 
If you must drive through standing wa-
ter, drive slowly to prevent water from 
entering the passenger compartment 
or the engine compartment. Water in 
these areas could cause damage to 
electrical components or wiring of the 
engine or transmission, or could result 
in water being ingested by the engine 
through the air intake causing severe 
internal engine damage. Any such dam-
age is not covered by the 
Mercedes-Benz Limited Warranty.
Warning!
G
Always fasten items being carried as secure-
ly as possible.
In an accident, during hard braking or sud-
den maneuvers, loose items will be thrown 
around inside the vehicle, and cause injury 
to vehicle occupants unless the items are 
securely fastened in the vehicle.
The trunk is the preferred place to carry ob-
jects.
Warning!
G
Please do not forget that your primary re-
sponsibility is to drive the vehicle safely. 
Only operate the COMAND (Cockpit Man-
agement and Data System), radio or tele-
phone
1 if road, weather and traffic 
conditions permit.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km / h), your vehicle is 
covering a distance of 44 feet (approximate-
ly 14 m) every second.
1Observe all legal requirements 
     
        
        Page 311 of 506

309 Operation
Engine compartment
Replace and tighten cap.
For more information on coolant, see the 
“Technical data” section (
page 466).
Battery
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. Refer to Maintenance 
Booklet for battery maintenance intervals.
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. 
     
        
        Page 435 of 506

433 Practical hints
Batteries
Batteries
Your vehicle is equipped with two batter-
ies:
Main battery (battery for starter and 
electrical consumers; located in the 
trunk).
Auxiliary battery (back-up battery; sta-
bilizes the electrical system if the main 
battery is discharged; located in the en-
gine compartment)
The main battery is in the trunk under the 
luggage box. Remove the luggage box 
(
page 408).
Vehicles with spare wheel1Negative 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.
Observe all safety instructions and precau-
tions when handling automotive batteries 
(page 309).
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. 
     
        
        Page 460 of 506
458 Technical dataElectrical systemModel
E320, E3204MATIC
E 500, E 500 4MATIC
E55AMG
Generator (alternator)
14 V/150 A
14 V/150 A
14 V/180 A
Starter motor
14 V/1.4 kW
14 V/1.7 kW
14 V/1.7 kW
Battery (auxiliary)
12 V/12 Ah
12 V/12 Ah
12 V/12 Ah
Battery (main)
12 V/95 Ah
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
NGK IL FR 6 A
Electrode gap
0.039 in (1.00 mm)
0.039 in (1.00 mm)
0.031 in (0.8 mm)
Tightening torque
18.5 - 22 lb-ft (25 - 30 Nm)
18.5 - 22 lb-ft (25 - 30 Nm)
18.5 - 22 lb-ft (25 - 30 Nm)
Model
E 320 CDI
Generator (alternator)
14 V/200 A
Starter motor
14 V/2.2 kW
Battery (auxiliary)
12 V/12 Ah
Battery (main)
12 V/95 Ah