Instruction book Audi A3 Version Year 2014
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Audi A3  Safety  Airbag system  Knee airbag
Applies to Audi A3s: with knee airbag
The knee airbag system can give additional protection to a driver wearing a seat belt.
The knee airbag on the driver's side is located in the dash panel underneath the steering wheel Fig. 1.
The knee airbag provides extra protection for the driver's knees and thighs in addition to the protection already given by the seat belt.
In addition to its normal function of restraining an occupant, the seat belt also holds the driver in a position where the airbag can provide extra protection in a frontal collision.
The airbag system is just one component of the Audi A3's restraint system and cannot replace the function of the seat belts. Please always remember that the airbags can only protect you if you are wearing your seat belt properly. That is why it is so important to wear your seat belt at all times (not just because it's the law) Link.
Please also bear in mind that the airbags are only inflated in certain types of accident and that they can only be triggered once. The seat belts are also intended to protect you in situations where the airbags are not triggered or have already been triggered (e.g. if your Audi A3 collides with a second Audi A3 following an initial impact).
That is just one reason why an airbag cannot replace a seat belt. The airbag system is most effective when used in conjunction with the seat belts. Always fasten your seat belt properly for this reason.
Please note that, although the knee airbag system is designed to reduce the risk of serious injury, the airbags can cause other injuries when inflated (such as inflammation, bruising, abrasion and friction burns).
The basic parts of the knee airbag system (driver's side) are:
  • The electronic control unit
  • An inflatable airbag (airbag and gas generator) for the driver
  • The airbag warning lamp in the instrument cluster
The knee airbag system is NOT triggered in the following situations:
  • If the ignition is off
  • In a frontal collision if the retardation rate measured by the control unit is too low
  • In side-on collisions
  • If your Audi A3 is hit from behind
  • If the Audi A3 overturns
  • If a system malfunction occurs (warning/indicator lamp on) Link
WARNING!
  • The seat belt and knee airbag system can only protect the driver if he/she is sitting in the correct position Link.
  • Have the system checked immediately by your Audi dealer if the airbag warning lamp lights up while you are driving Link.
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