2008 MERCEDES-BENZ C300 air bag

Contents
Introduction.......................................... 9
Product information ................................ 9
Operator’s Manual ............................... 10
Service and warranty information .. 10
Important notice for California
retail buyers and lessees of
Mercedes-Benz automobiles .......... 11
Maintenance .................................. 11
Roadside Assistance ...................... 12
Change of address or ownership.... 12
Operating your vehicle
outside the USA or Canada ............ 12
Where to find it .................................... 13
Symbols ............................................... 14
Operating safety .................................. 15
Proper use of the vehicle ............... 15
Problems with your vehicle .................. 16
Reporting safety defects...................... 17
Reporting safety defects ................ 17
Vehicle data recording ......................... 18
Information regarding electronic
recording devices ........................... 18At a glance.......................................... 19
Exterior view ......................................... 20
Storage compartments ......................... 22
Cockpit ................................................. 24
Instrument cluster ................................ 26
Multifunction steering wheel ................ 28
Center console ..................................... 29
Upper part ...................................... 29
Lower part ...................................... 30
Overhead control panel ........................ 31
Driver’s door control panel
and seat adjustment/memory*............ 32Safety and Security........................... 33
Occupant safety ................................... 34
Air bags .......................................... 36
Occupant Classification System ..... 41
Seat belts ....................................... 46
Active head restraints ..................... 50
Children in the vehicle .................... 51
Blocking of
rear door window operation............ 57
Panic alarm .......................................... 58
Driving safety systems ......................... 59
ABS ................................................. 59
Adaptive Brake ............................... 60
BAS ................................................. 60
EBP ................................................. 61
ESP
®............................................... 62
Four wheel electronic traction
system (4MATIC) with the ESP
®..... 65
Anti-theft systems ................................ 66
Immobilizer ..................................... 66
Anti-theft alarm system .................. 66
Canceling the alarm ........................ 67

Contents
At the gas station .............................. 322
Refueling ...................................... 322
Check regularly and
before a long trip.......................... 324
Engine compartment ......................... 325
Hood ............................................ 325
Engine oil ..................................... 327
Transmission fluid level ................ 328
Coolant level ................................ 329
Windshield washer system and
headlamp cleaning system* ......... 330
Tires and wheels ................................ 331
Important guidelines .................... 331
Tire care and maintenance........... 332
Direction of rotation ..................... 334
Loading the vehicle ...................... 334
Recommended tire
inflation pressure ......................... 339
Checking tire inflation pressure ... 341
Tire labeling.................................. 348
Load identification ....................... 352
DOT,
Tire Identification Number (TIN) ... 352
Maximum tire load ....................... 353
Maximum tire inflation pressure .. 354Uniform Tire Quality Grading
Standards (U.S. vehicles) .............. 354
Tire ply material ............................ 356
Tire and loading terminology......... 356
Rotating tires ................................ 359
Winter driving ..................................... 360
Winter tires ................................... 360
Snow chains.................................. 361
Maintenance....................................... 362
Maintenance
service indicator message ............ 362
Calling up the maintenance
service indicator display ............... 363
Resetting the maintenance
service indicator ........................... 363
Vehicle care........................................ 364
Cleaning and care of vehicle ......... 364
Practical hints.................................. 373
What to do if …? ................................. 374
Lamps in instrument cluster ......... 374
Air bag off indicator lamp ............. 385
Vehicle status messages in
the multifunction display .............. 387
Where will I find ...? ............................ 420
First aid kit.................................... 420
Vehicle jack, vehicle tool kit,
luggage bowl, Minispare wheel ..... 420
Unlocking/locking in an emergency .. 424
Unlocking the vehicle ................... 424
Locking the vehicle ....................... 425
Fuel filler flap ................................ 426
Manually unlocking the
transmission gear selector lever ... 426
Resetting activated head restraints.... 427
Replacing SmartKey batteries ............ 428
Replacing bulbs .................................. 430
Bulbs............................................. 431
Replacing bulbs for front lamps .... 432
Replacing bulbs for rear lamps ..... 436
Replacing wiper blades ...................... 438
Removing wiper blades ................. 439
Installing wiper blades .................. 439

29 At a glance
Center console
Center console
Upper partItemPage
1Audio display cover180
2Hazard warning flasher
switch – switching on/off114
3Anti-theft alarm system
indicator lamp66
4Front passenger front
air bag off indicator lamp45,
385,
393
5ESP® control switch64
6Audio system,176
or
COMAND* (see separate
operating instructions)
ItemPage
7Seat heating*, passenger
side91
8Rear window sunshade
switch*290
9Dual-zone automatic
climate control250
3-zone automatic climate
control* (Canada only)259
Rear window defroster256,
265
aSeat heating*, driver’s side91

34 Safety and Security
Occupant safety
In this section you will learn the most
important facts about the restraint
systems of the vehicle.
The restraint systems are

Seat belts

Child restraints

Lower Anchors and Tethers for
CH
ildren (LATCH)
Additional protection potential provide

Supplemental Restraint System (SRS)
with

Air bags

Air bag control unit (with crash
sensors)

Emergency Tensioning Device
(ETD) for seat belts

Seat belt force limiter

Active head restraintsAir bag system components with

Front passenger front air bag off
indicator lamp

Front passenger seat with Occupant
C
lassification System (OCS)
Although independent systems, their pro-
tective functions work in conjunction with
each other.The SRS system conducts a self-test when
the ignition is switched on and in regular
intervals while the engine is running. This
facilitates early detection of malfunctions.
The =indicator lamp in the instrument
cluster (page 26) comes on when the
ignition is switched on and goes out no lat-
er than a few seconds after the engine has
been started.
The SRS components are in operational
readiness when the =indicator lamp is
not lit when the engine is running.
A malfunction in the system has been
detected if the =indicator lamp:

fails to go out after approximately
4 seconds after the engine was started

does not come on at all

comes on after the engine was started
or while driving
iFor information on infants and children trav-
eling with you in the vehicle and restraint sys-
tems for infants and children, see “Children in
the vehicle” (
page 51).

35 Safety and Security
Occupant safety
Warning!G
Modifications to or work improperly con-
ducted on restraint systems (such as seat
belts and anchors, Emergency Tensioning
Devices (ETDs), seat belt force limiters or air
bags) or their wiring, as well as tampering
with interconnected electronic systems, can
lead to the restraint systems no longer func-
tioning as intended.
Air bags or Emergency Tensioning Devices
(ETDs), for example, could deploy inadvert-
ently or fail to deploy in accidents although
the deceleration threshold for air bag de-
ployment is exceeded. Therefore, never
modify the restraint systems. Do not tamper
with electronic components or their soft-
ware.
Warning!G
In the event that the =indicator lamp
comes on during driving or does not come
on at all, the SRS self-check has detected a
malfunction. For your safety, we strongly
recommend that you contact an authorized
Mercedes-Benz Center immediately to have
the system checked; otherwise the SRS may
not deploy when needed in an accident,
which could result in serious or fatal injury,
or it might deploy unexpectedly and unnec-
essarily which could also result in injury.
In addition, improper work on the SRS
creates a risk of rendering the SRS inopera-
tive or causing unintended air bag deploy-
ment. Work on the SRS must therefore only
be performed by qualified technicians. Con-
tact an authorized Mercedes-Benz Center.
If it is necessary to modify an air bag system
to accommodate a person with disabilities,
contact your local authorized
Mercedes-Benz Center or call our Customer
Assistance Center at 1-800-FOR-MERCedes
(1-800-367-6372) for details.

36 Safety and Security
Occupant safety
Air bags
Warning!G
Air bags are designed to reduce the poten-
tial of injury and fatality in certain frontal im-
pacts (front air bags), side impacts (front
side impact air bags, rear side impact air
bags* and window curtain air bags) or roll-
overs (window curtain air bags). However,
no system available today can totally elimi-
nate injuries and fatalities.
The deployment of the air bags temporarily
releases a small amount of dust from the air
bags. This dust, however, is neither injurious
to your health, nor does it indicate a fire in
the vehicle. The dust might cause some tem-
porary breathing difficulty for people with
asthma or other breathing trouble. To avoid
this, you may wish to get out of the vehicle
as soon as it is safe to do so. If you have any
breathing difficulty but cannot get out of the
vehicle after the air bag inflates, then get
fresh air by opening a window or door.
Warning!G
To reduce the risk of injury when the front
air bags inflate, it is very important for the
driver and front passenger to always be in a
properly seated position and to wear their
respective seat belt.
For maximum protection in the event of a
collision always be in normal seated position
with your back against the backrest. Fasten
your seat belt and make sure it is properly
positioned on your body.
Since the air bag inflates with considerable
speed and force, a proper seating and hands
on steering wheel position will help to keep
you at a safe distance from the air bag.
Occupants who are unbelted, out of position
or too close to the air bag can be seriously
injured or killed by an air bag as it inflates
with great force in the blink of an eye:

Sit properly belted in a nearly upright
position with your back against the seat
backrest.

Adjust the driver’s seat as far as possi-
ble rearward, still permitting proper op-
eration of vehicle controls. The distance
from the center of the driver’s breast-
bone to the center of the air bag cover
on the steering wheel must be at least
10 inches (25 cm) or more. You should
be able to accomplish this by a combina-
tion of adjustments to the seat and
steering wheel. If you have any prob-
lems, please see an authorized
Mercedes-Benz Center.

Do not lean your head or chest close to
the steering wheel or dashboard.

Keep hands on the outside of steering
wheel rim. Placing hands and arms in-
side the rim can increase the risk and
potential severity of hand/arm injury
when driver’s front air bag inflates.

Adjust the front passenger seat as far as
possible rearward from the dashboard
when the seat is occupied.

37 Safety and Security
Occupant safety

Always sit as upright as possible, prop-
erly use the seat belts and use an appro-
priately sized infant restraint, toddler
restraint, or booster seat recommended
for the size and weight of the child.
Failure to follow these instructions can
result in severe injuries to you or other
occupants.
If you sell your vehicle, it is important that
you make the buyer aware of this safety
information. Be sure to give the buyer this
Operator’s Manual.
Warning!G
Accident research shows that the safest
place for children in an automobile is in the
rear seat.
There is a possibility for a side impact air
bag related injury if occupants, especially
children, are not properly seated or re-
strained when next to a front side impact air
bag and/or rear side impact air bag* which
needs to deploy rapidly in a side impact in
order to do its job.
To help avoid the possibility of injury, please
follow these guidelines:
(1) Always sit as upright as possible,
properly use the seat belts, and for all
children 12 years old and under, use an
appropriately sized infant restraint, tod-
dler restraint, or booster seat recom-
mended for the size and weight of the
child.
(2) Always wear seat belts properly.iAir bags are designed to deploy only in cer-
tain frontal impacts (front air bags), and in side
impacts (front side impact air bags, rear side im-
pact* air bags, and window curtain air bags)
which exceed preset thresholds, and in certain
rollovers (window curtain air bags). Only during
these events will they provide their supplemental
protection.
The driver and passengers should always wear
their seat belts. Otherwise it is not possible for
air bags to provide their supplemental protec-
tion.
In case of other types of impacts and impacts be-
low air bag deployment thresholds, air bags will
not deploy. The driver and passenger will then be
protected to the extent possible by a properly
fastened seat belt. A properly fastened seat belt
is also needed to provide the best possible pro-
tection in a rollover.
We caution you not to rely on the presence of the
air bags in order to avoid wearing your seat belt.
It is important to your safety and that of your pas-
sengers that you replace deployed air bags and
repair any malfunctioning air bags to make sure
the vehicle will continue to provide supplemental
crash protection for occupants.

38 Safety and Security
Occupant safety
Safety guidelines for the seat belt,
emergency tensioning device and
air bag
Warning!G

Damaged seat belts or seat belt that
were highly stressed in an accident
must be replaced and their anchoring
points must also be checked. Only use
seat belts installed or supplied at an au-
thorized Mercedes-Benz Center.

Air bags and Emergency Tensioning
Devices (ETDs) contain Perchlorate
material, which may require special han-
dling and regard for the environment.
Check with your local government’s dis-
posal guidelines. California residents,
see http://www.dtsc.ca.gov/Hazard-
ousWaste/Perchlorate/index.cfm.

Air bags and pyrotechnic emergency
tensioning devices (ETDs) are designed
to function on a one-time-only basis. An
air bag or ETD that is deployed must be
replaced.

Do not pass seat belt over sharp edges.
They could tear.

Do not make any modification that could
change the effectiveness of the seat
belts.

Do not bleach or dye seat belts as this
may severely weaken them. In a crash
they may not be able to provide ade-
quate protection.

No modifications of any kind may be
made to any components or wiring of
the SRS. This includes changing or
removing any component or part of the
SRS, the installation of additional trim
material, badges, etc. over the steering
wheel hub, front passenger front air bag
cover, outboard sides of the seat
backrests, door trim panels, or door
frame trims, and installation of addition-
al electrical/electronic equipment on or
near SRS components and wiring. Keep
area between air bags and occupants
free from objects (e.g. packages, purs-
es, umbrellas, etc.).

Do not hang items such as coat hangers
from the coat hooks or handles over the
door. These items may turn into projec-
tiles and cause head and other injuries
when the window curtain air bag is
deployed.

Air bag system components will be hot
after an air bag has inflated. Do not
touch.

Never place your feet on the instrument
panel, dashboard, or on the seat. Always
keep both feet on the floor in front of the
seat.

In addition, improper repair work on the
SRS creates a risk of rendering the SRS
inoperative or causing unintended air
bag deployment. Work on the SRS must
therefore only be performed by qualified
technicians. Contact an authorized
Mercedes-Benz Center.