Knee Bag - Mercedes-Benz CLA Operator's Manual

function for the vehicle occupants in the
event of a crash.
i
After an air bag has been deployed, have
the vehicle towed to the nearest qualified
specialist workshop, even if your vehicle is
ready to drive.
Front air bags
Driver's air bag : deploys in front of the
steering wheel; front-passenger front air
bag ; deploys in front of and above the glove
box.
The front air bags increase protection for the
driver's and front passenger's head and
chest.
They are deployed:
at the start of an accident with a high rate
R
of vehicle acceleration or deceleration in a
longitudinal direction
if the system determines that air bag
R
deployment can offer additional protection
to that provided by the seat belt
depending on whether the seat belt is being
R
used
independently of other air bags in the
R
vehicle
If the vehicle rolls over, the front air bags are
generally not deployed.
Your vehicle has adaptive, two-stage front air
bags. The air bag control unit evaluates
vehicle deceleration or acceleration in the
event of a collision. In the first deployment
stage, the front air bag is filled with part of the
total available propellant gas, thereby
Occupant safety
reducing the risk of injury. If the air bag
control unit recognizes within a few
milliseconds that the vehicle is being braked
or accelerated faster than originally
predicted, the front air bag is filled with the
maximum amount of propellant gas available.
The deployment of the front-passenger front
air bag is also influenced by the weight
category of the front passenger, which is
determined by the Occupant Classification
System (OCS) ( page 45).
Y
The lighter the passenger-side occupant, the
higher the vehicle deceleration rate required
(predicted at the start of the impact) for
second stage inflation of the front-passenger
front air bag. In the second stage, the front
air bags are inflated with the maximum
amount of propellant gas available.
The front air bags are not deployed in
situations where a low impact severity is
predicted. You will then be protected by the
fastened seat belt.
The front-passenger front air bag will only
deploy if:
the system, based on the OCS weight
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sensor readings, detects that the front-
passenger seat is occupied
the PASSENGER AIR BAG OFF indicator
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lamp on the center console is not lit
( page 45)
Y
the air bag control unit predicts a high
R
impact severity
Knee bags
43
Z