Adaptive Steering Column, Function
| Number | Designation | Number | Designation |
| 1 | Fixed bracket | 6 | Grater plate |
| 2 | Running bracket | 7 | Pin (only USA/CDN) |
| 3 | Upper steering section | 8 | Pyrotechnic charge (only USA/CDN) |
| 4 | Adjustment lever | 9 | Steering lock |
| 5 | steering column |
Deformations in the event of a collision
It requires an impact of about 2 kN for the steering column to start deforming. The deformation occurs in three steps:
- The upper steering section (3) slides into the running bracket (2) corresponding to the remaining adjustment on the adjustment mechanism (4).
- The grater plate (6) deforms. The running bracket (2) slides into the fixed bracket (1). The running bracket's track controls the deformation length.
- The steering shaft (5) with its telescopically shaped design slides together.
Maximum movement (deformation) of the steering column is about 95 mm.
The adaptive steering column allows for a relatively smooth deformation sequence in the event of a collision (only applies to belted drivers, USA/CDN).
Collision sequence (applies to USA/CDN)
Unbelted driver:
The pin (7) is in operation. This allows the grater plate to use its entire structure to absorb energy. Deformation occurs silently and slowly.
Belted driver:
The pyrotechnic charge (8) is activated and pushes down the pin (7), from the grater plate (6). The grater plate weakens and the collision's kinetic energy is passed on in the system. This provides a relatively smooth deformation sequence. The collision protection only works if the driver is belted and the airbag deploys.
Collision sequence (does not apply to USA/CDN)
The steering column does not have a pyrotechnic charge. The pin (7) is therefore always in operation. This allows the grater plate (6) to use its entire structure to absorb energy regardless whether the driver is belted or not. Deformation occurs silently and slowly.
Electric steering lock with mechanical locking function
The steering lock (9) is secured in the steering column by two security bolts.
The lock mechanism's mechanical locking function consists of:
- a lug on the steering lock
- a tube with locking channels on the steering column
- a pin for locking the lug.
The lug slides into the tube with locking channels, so that the steering wheel locks. When the steering lock's cover is affected, the pin locks the lug in the locked position.