warning light MERCEDES-BENZ B-CLASS HATCHBACK 2008 User Guide

Cockpit
23Function Page
1
Opens the bonnet 171
2
Combination switch: 78
• main-beam headlamps 78
• turn signals 78
• windscreen wipers 82
• rear window wiper 82
3
Cruise control lever*:
• Cruise control* 114
• Speedtronic*
116 Function Page
4
Multi-function steering
wheel
98
5
Instrument cluster 26
6
Horn
7
Parktronic* warning dis-
play
120
8
Overhead control panel
33 Function Page
9
Opens the glove compart-
ment
158
a
Centre console 31
b
Ignition lock 62
c
Adjusts the steering wheel 69
d
Adjusts the headlamp
range
79
e
Light switch 76
f
Door control panel 34At a glance
* optional
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Cockpit
25Function Page
1
Overhead control panel 33
2
Parktronic* warning dis-
play
120
3
Combination switch: 78
• main-beam headlamps 78
• turn signals 78
• windscreen wipers 82
• rear window wiper 82
4
Cruise control lever*:
• Cruise control* 114
• Speedtronic*
116 Function Page
5
Multi-function steering
wheel
98
6
Instrument cluster 26
7
Horn
8
Opens the bonnet 171
9
Door control panel 34
a
Light switch
76 Function Page
b
Adjusts the headlamp
range
79
c
Ignition lock 62
d
Adjusts the steering wheel 69
e
Centre console 31
f
Opens the glove compart-
ment
158At a glance
* optional
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Instrument cluster
27Function Page
1
LIM indicator lamp* 114
2
ESP
®
(Electronic Stability
Program) warning lamp 226
3
Speedometer
4
Turn signal indicator lamp 78
5
Multi-function display,
upper section
99
6
Trip distance 97
7
Total distance 102
8
Turn signal indicator lamp 78
9
ABS (anti-lock braking sys-
tem) warning lamp
224
a
Diesel engine: preglow indi-
cator lamp
87
b
Rev counter
97 Function Page
c
SRS (Supplemental
Restraint System) warning
lamp
226
d
Engine diagnostics warning
lamp
227
e
Reserve fuel warning lamp 229
f
Fuel filler cap location: the
fuel filter cap is to the rear
on the right
g
Fuel gauge
h
Main-beam indicator lamp 78
j
Dipped-beam indicator
lamp
77
k
Seat belt warning lamp
228 Function Page
l
Clock 98
Speedtronic*: stored limit
speed
116
m
Depending on the setting in
the on-board computer:
107
• Outside temperature
1 • Digital speedometer
n
Rear window wiper
switched on
82
o
Multi-function display,
lower section
99
p
AUTOTRONIC*: drive pro-
gram display
92
q
AUTOTRONIC*: selector
lever position display
93
r
Brake system warning lamp 226
s
Reset button 97
t
Coolant temperature gauge 97
1
Vehicles for United Kingdom: the speed in km/h is always shown instead of the outside temperature. At a glance
* optional
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Instrument cluster
29Function Page
1
LIM indicator lamp* 114
2
ESP
®
warning lamp 226
3
Speedometer
4
Turn signal indicator lamp 78
5
Multi-function display,
upper section
99
6
Trip distance 97
7
Total distance 102
8
Turn signal indicator lamp 78
9
ABS warning lamp 224
a
Diesel engine: preglow indi-
cator lamp
87
b
Rev counter 97
c
SRS warning lamp
226 Function Page
d
Engine diagnostics warning
lamp
227
e
Reserve fuel warning lamp 229
f
Fuel filler cap location: the
fuel filter cap is to the rear
on the right
g
Fuel gauge
h
Main-beam indicator lamp 78
j
Dipped-beam indicator
lamp
77
k
Seat belt warning lamp 228
l
Clock 98
Speedtronic*: stored limit
speed
116 Function Page
m
Depending on the setting in
the on-board computer:
107
• Outside temperature
2 • Digital speedometer
n
Rear window wiper
switched on
82
o
Multi-function display,
lower section
99
p
AUTOTRONIC*: drive pro-
gram display
92
q
AUTOTRONIC*: selector
lever position display
93
r
Brake system warning lamp 226
s
Reset button 97
t
Coolant temperature gauge 97
2
Vehicles for United Kingdom: the speed in km/h is always shown instead of the outside temperature. At a glance
* optional
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Centre console
31Centre console
Upper section Function Page
1
Switches the hazard warn-
ing lamps on/off
79
2
5
PASSENGER AIRBAG
OFF warning lamp* 45
3
Controls COMAND APS*
and the audio system* –
see the respective operat-
ing instructions
4
Controls Heatmatic, the air-
conditioning system* or
Thermotronic*
128
Switches the rear window
heating on/off
139
5
Activates/deactivates the
seat heating* for the right-
hand seat
68
6
Activates/deactivates the
ECO start/stop function*
126
7
Primes/deactivates the
interior motion sensor*/
tow-away protection*
58 Function Page
8
Deactivates/activates
Parktronic*
121
9
Activates/deactivates the
seat heating* for the left-
hand seat
68At a glance
* optional
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Occupant safety
37carry out any modifications on the restraint
systems.
Never tamper with electronic components
and their software.
SRS (Supplemental Restraint System)
The SRS reduces the risk of occupants com-
ing into contact with the vehicle's interior in
the event of an accident. It can also reduce
the forces to which occupants are subjected
during an accident.
The SRS consists of:
R The 1 warning lamp
R belt tensioners
R belt force limiters
R airbags
The 1 1 warning lamp The SRS functions are checked regularly
when you turn on the ignition and when the
engine is running. Malfunctions can therefore
be detected in good time.
The
1 warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started. G
Risk of injury
If SRS is malfunctioning, individual systems
may be activated unintentionally or not be
deployed in the event of an accident with
heavy braking.
A malfunction has occurred if the +
warning lamp:
R does not light up when you switch on the
ignition
R does not go out after the engine has been
running for a few seconds
R lights up again once the engine is running
In this case, have SRS checked immedi-
ately at a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags In the event of a collision, the sensor in the
airbag control unit evaluates important phys-
ical data such as duration, direction and force
of the vehicle deceleration or acceleration.
Based on the evaluation of this data and
depending on the vehicle's rate of longitudi-
nal deceleration in a collision, in the first
stage the airbag control unit pre-emptively
triggers the belt tensioners. The front airbags are only deployed if there is
an even higher rate of vehicle deceleration in
a longitudinal direction.
Your vehicle has adaptive, dual stage front
airbags. When the first activation threshold is
reached, the front airbag is filled with enough
propellant gas to reduce the risk of injuries.
The front airbag is only fully inflated if a sec-
ond threshold is reached within a few milli-
seconds, due to the control unit having detec-
ted further deceleration.
Criteria for triggering belt tensioners and
airbags
In the first stage of a collision, the airbag con-
trol unit evaluates the duration and direction
of vehicle acceleration or deceleration in
order to determine whether it is necessary to
trigger the belt tensioner and/or airbag.
The belt tensioner and airbag triggering
thresholds are variable and are adapted to the
rate of deceleration of the vehicle. This proc-
ess is pre-emptive in nature as the airbag
must be deployed during – and not at the end
of – the collision.
i Airbags are not deployed in all types of
accidents. They are controlled by complex
sensor technology and evaluation logic.
This process is pre-emptive in nature as Safety
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Occupant safety
38airbag deployment must take place during
the impact and must be adapted to provide
calculated, additional protection for the
vehicle occupants. Not all airbags are
deployed in an accident.
The different airbag systems work inde-
pendently of each other. However, the
deployment of each individual system will
depend on the type of accident determined
by the control system in the first stages of
the collision (head-on collision, side impact
and overturn) and the extent of the acci-
dent (in particular, the vehicle's rate of
deceleration or acceleration).
The rate of vehicle deceleration or accelera-
tion and the direction of the force are basi-
cally determined by:
R the distribution of forces during the colli-
sion
R the collision angle
R the deformation characteristics of the vehi-
cle
R the characteristics of the object with which
the vehicle has collided, e.g. the other vehi-
cle
Factors which can only be seen and measured
after a collision has occurred do not play a decisive role in the deployment of an airbag,
nor do they provide an indication of it.
The vehicle may be deformed significantly,
e. g. on the bonnet or the wing, without an
airbag being deployed. This is the case if only
parts which are relatively easily deformed are
affected and the necessary deceleration does
not occur. Conversely, airbags may be
deployed even though the vehicle suffers only
minor deformations. This is the case if, for
example, very rigid vehicle parts such as lon-
gitudinal body members are affected and suf-
ficient deceleration occurs as a result.
Belt tensioners, belt force limiters The front seat belts and the outer seat belts
in the rear are equipped with belt tensioners.
If the seat belt is also equipped with a belt
force limiter, the force exerted by the seat
belt on the seat occupant is reduced.
Belt tensioners tighten the seat belts in an
accident, pulling them close against the body.
i Belt tensioners do not correct incorrect
seat positions or incorrectly fastened seat
belts.
Belt tensioners do not pull occupants back
towards the backrest. The front belt force limiters are synchronised
with the front airbags, which distribute the
forces exerted by the belt force limiters on
the occupant over a greater area.
When the ignition is switched on, the belt ten-
sioner is triggered:
R
only if the restraint systems are operational
(the 1 warning lamp lights up after the
ignition is switched on and goes out once
the engine is running) (Y page 37)
R in the event of a head-on or rear-end colli-
sion if the vehicle decelerates or acceler-
ates rapidly in a longitudinal direction dur-
ing the initial stages of impact
If the airbags are deployed, you will hear a
bang and a small amount of powder may also
be released. Only in rare cases will the bang
affect your hearing. The powder that escapes
does not generally constitute a health hazard.
The 1 warning lamp lights up. G
Risk of injury
If the seat belt tensioners have been trig-
gered, they provide no additional protec-
tion in the event of another accident. There-
fore, have belt tensioners which have been
triggered replaced at a qualified specialist
workshop. Safety
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Occupant safety
39Comply with safety regulations when dis-
posing of belt tensioners. Any Mercedes-
Benz Service Centre can provide details of
these regulations.
Airbags Airbag deployment slows down and restricts
the movement of the vehicle occupant.
If the airbags are deployed, you will hear a
bang and a small amount of powder may also
be released. Only in rare cases will the bang
affect your hearing. The powder that escapes
does not generally constitute a health hazard.
The
1 warning lamp lights up.
The SRS/AIRBAG identification indicates the
location of the airbags. G
Risk of injury
Airbags provide additional protection; they
are not, however, a substitute for seat
belts.
Observe the following notes to reduce the
risk of serious or even fatal injury if an air-
bag is deployed:
R all vehicle occupants — in particular preg-
nant women — must wear their seat belt
correctly at all times and lean back against the backrest, which should be
positioned as close to the vertical as pos-
sible. The head restraint must support
the back of the head at about eye level.
R always secure children less than 1.50 m
tall or under 12 years of age in suitable
child restraint systems.
R all vehicle occupants must select a seat
position that is as far away from the air-
bag as possible. The driver's seat posi-
tion must allow the vehicle to be driven
safely. The driver's chest should be as far
away from the middle of the driver's front
airbag cover as possible.
R move the front-passenger seat as far
back as possible, especially if a child is
secured in a child restraint system on the
seat.
R vehicle occupants – in particular, chil-
dren – must not lean their head on the
area of the window in which a sidebag or
head/thorax airbag* is deployed.
R Rearward-facing child restraint systems
must not be fitted to the front-passenger
seat unless the front-passenger front air-
bag has been disabled. The front-
passenger front airbag of a vehicle fitted with automatic child seat recognition* is
only disabled when a child restraint sys-
tem with automatic child seat recogni-
tion is fitted to the front-passenger seat.
The 5 PASSENGER AIRBAG OFF
warning lamp must be constantly lit.
If the front-passenger seat of your vehicle
does not have automatic child seat rec-
ognition*, or your rearward-facing child
restraint system does not have such a
feature, children must be secured in a
child restraint system on a suitable seat
in the rear. If you secure a forward-facing
child restraint system to the front-
passenger seat, you must move the front-
passenger seat as far back as possible.
R make sure there are no heavy or sharp-
edged objects in pockets of clothing.
R do not lean forwards, e.g. over the cover
of the driver's front airbag, particularly
when the vehicle is in motion.
R do not put your feet on the dashboard.
R only hold the steering wheel by the rim.
This allows the airbag to inflate fully. You
could be injured if the airbag is deployed
and you are holding the inside of the
steering wheel. Safety
* optional
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Occupant safety
41
Driver's front airbag
1deploys in front of the
steering wheel; front-passenger front airbag
2 deploys in front of and above the glove
compartment.
On vehicles with automatic child seat recog-
nition in the front-passenger seat*, front-
passenger front airbag 2is only deployed if
the 5 PASSENGER AIRBAG OFF warning
lamp in the centre console is not lit
(Y page 45). This means that there is not a
child restraint system with automatic child
seat recognition* fitted to the front-
passenger seat or that a child restraint sys-
tem with automatic child seat recognition*
has been fitted to the front-passenger seat
incorrectly.
Head/thorax airbags, rear sidebags*
i If you have specified windowbags* as
optional equipment, the front seats of the
vehicle will be equipped with sidebags
instead of head/thorax airbags. G
Risk of injury
If you wish to use seat covers, Mercedes-
Benz recommends that, for safety reasons,
you only use seat covers that have been
approved for Mercedes-Benz vehicles. The seat covers must have a special tear
seam for head/thorax airbags. Otherwise,
a head/thorax airbag cannot deploy cor-
rectly and would fail to provide the intended
protection in the event of an accident.
Appropriate seat covers can be obtained
from a Mercedes-Benz Service Centre.
The purpose of head/thorax airbag deploy-
ment is to enhance the level of protection for
the head and thorax (but not the arms) of the
vehicle occupants on the side of the vehicle
on which the impact occurs.
The purpose of rear sidebag deployment is to
enhance the level of protection for the thorax
(but not the head, neck or arms) of the vehicle
occupants on the side of the vehicle on which
the impact occurs. 1
Front head/thorax airbag
2 Rear sidebag in the side trim next to the
backrest
The front head/thorax airbags or rear side-
bags inflate next to the outer seat cushion.
Front head/thorax airbag 1or rear sidebags
2 are deployed:
R on the side on which an impact occurs
R at the start of an accident with a high rate
of lateral vehicle deceleration or accelera-
tion, e.g. in a side impact
R independently of the seat belt use
R independently of the front airbags
R independently of the belt tensioners Safety
* optional
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Occupant safety
44 approved for use in Mercedes-Benz vehi-
cles.
Vehicles with a through-loading feature* in
the rear seat backrest: do not fit a rear-
ward-facing child restraint system on the
centre rear seat.
Child seat on the front-passenger seat Warning on the front-passenger sun visor Warning symbol for a rearward-facing child
restraint system
G
Risk of injury
If the front-passenger front airbag is not
disabled:
R a child secured in a child restraint system
on the front-passenger seat could be
seriously and even fatally injured by the
front-passenger front airbag deploying.
This is especially a risk if the child is in
the immediate vicinity of the front-
passenger front airbag when it deploys.
R a child must never be secured on the
front-passenger seat in a rearward-facing
child restraint system. Only secure a rearward-facing child restraint system on
a suitable rear seat.
R always move the front-passenger seat to
the rearmost position if you secure a
child in a forward-facing child restraint
system on the front-passenger seat.
The front-passenger front airbag is not dis-
abled:
R on vehicles without automatic child seat
recognition on the front-passenger
seat*.
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat*, if
there is no child restraint system with
automatic child seat recognition fitted to
the front-passenger seat.
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat* if
the 4 PASSENGER AIRBAG OFF warn-
ing lamp is not lit.
To draw attention to this danger, a corre-
sponding warning sticker on the dashboard
and on both sides of the sun visor on the
front-passenger side.
Information about recommended child
restraint systems is available at any
Mercedes-Benz Service Centre. Safety
* optional
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