Mercedes-Benz E-Class 2010, Owner'S Manual

Page: 36 / 333

gered unintentionally. Never carry out any
modifications on the restraint systems.
Never tamper with electronic components
and their software.
SRS (Supplemental Restraint System)
Introduction
SRS reduces the risk of occupants coming
into contact with the vehicle's interior in the
event of an accident. It can also reduce the
effect of the forces to which occupants are
subjected during an accident.
SRS consists of:
R
6 SRS warning lamp
R
airbags
R
airbag control unit (with crash sensors)
R
belt tensioners
R
belt force limiters
SRS warning lamp
SRS functions are checked regularly when
you switch on the ignition and when the
engine is running. Therefore, malfunctions
can be detected in good time.
The
6 SRS 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 may not
be triggered in the event of an accident with
a high rate of vehicle deceleration.
A malfunction has occurred if:
R
the 6 SRS warning lamp does not light
up after the ignition is switched on.
R
the engine is running and the 6 SRS
warning lamp does not go out after a few
seconds.
R
the engine is running and the 6 SRS
warning lamp lights up again.
In this case, have SRS checked immediately
at a qualified specialist workshop. Mercedes-
Benz recommends that you use a Mercedes-
Benz Service Centre for this purpose.
In particular, work relevant to safety or on
safety-related systems must be carried out at
a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags
In the event of a collision, the airbag control
unit evaluates important physical data relat-
ing to the vehicle deceleration or acceleration
during the first stage of the collision, such as:
R
duration
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direction
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magnitude
Based on the evaluation of this data, the air-
bag control unit pre-emptively triggers the
belt tensioners in the first stage.
i
The belt tensioners can only be triggered
if the seat belt tongues are correctly
engaged in the seat belt buckles.
The front airbags are also deployed if there is
an even higher rate of vehicle deceleration in
a longitudinal direction.
Your vehicle has adaptive, dual-stage front
airbags. In the event of a collision, the airbag
control unit evaluates the vehicle decelera-
tion. When the first deployment threshold is
reached, the front airbag is filled with enough
gas to reduce the risk of injuries. The front
airbag is fully deployed if a second deploy-
ment threshold is exceeded within a few mil-
liseconds.
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. The triggering
process must take place in good time at the
start of the collision.
i
Not all airbags are deployed in an acci-
dent. The different airbag systems work
independently of each other.
Occupant safety
33
Safety
BA 207 ECE ÄJ 2010/1a; 1; 2, en-GB
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