Active Knee Protection
Active Knee Protection
The E63 US features knee airbags on the driver's side and passenger's side.
In the event of a crash, the knee airbag adds additional support for the knees. This initiates a controlled forward shift of the upper body, which is cushioned by the relevant airbag.
The knee airbag on the driver's side is located behind a cover under the steering column.
The knee airbag on the passenger's side is located behind a cover in the flap of the glove compartment.
E63 ASK Schematic
E64 Advance Safety Electronics
E64 Advance Safety Electronics are based on the systems of the E60/E63.
Changes to E64 ASK
The following charges have been made to the E64 ASK compared to the E60/E63:
^ AITS head protection is eliminated
^ New rollover protection system URSS added
^ Seat integrated belt system SGS
^ New vehicle center satellite, SFZR, with Rollover and acceleration sensors
^ Updated SGM to include actuators for Rollover protection system
Rollover Protection System
The Rollover protection system for the E64 consists of the following:
^ byteflight, the optical bus system
^ SGM
^ SBSL with acceleration sensors
^ SBSR with acceleration sensors
^ THEA with door pressure sensor
^ TMBF with door pressure sensor
^ SFZR with Rollover sensor and Acceleration Sensors
^ satellite switching center steering column SZL
^ URSS unit
SFZR
The SFZR of the E64 includes the additional sensors for rollover protection system activation. Sensor data is sent via byteflight to the SGM. The SFZR is mounted on the transmission tunnel.
SFZR Sensors
Included in SFZR are the following sensors:
^ Longitudinal acceleration sensor (x axis)
^ Transverse acceleration sensor (y axis)
^ Low g sensor (Rollover sensor) (,axis)
^ Turning rate sensor (turn in the x axis)
Function Mode
The SFZR contains two processors, the main processor and the auxiliary processor. The main processor computes an estimated angle of the vehicle based on data received from the ASK system sensors and information from the Rollover sensor and the turning rate sensor. The auxiliary processor computes estimated vehicle angle based on data received for the transverse acceleration sensors, the Rollover sensor and the turning rate sensor.
Information from both the main and auxiliary processors is constantly compared. If the processors determine the angle of the vehicle exceeds a fixed threshold the following sequence is initiated:
^ The main processor advises the SGM the vehicle has exceeded threshold limits vi the byteflight
^ The auxiliary processor activates the arming line (New to the E64) to the SGM
^ The SGM evaluated information received from both processors
^ The SGM activates both Rollover protection devices and they are driven up by spring pressure
SBSL
Since there are no Head Airbag AITS devices in the E64, the SBSL is only responsible for the activation of the driver side knee airbag and seat belt tensioner.
SBSR
The SBSR is responsible for the activation of the passenger front airbag, knee airbag and seat belt tensioner.
Rollover System Schematic
URSS Service Information
Activation of the rollover protection devices is possible through a Test Plan of the DIS plus or GT1.
During Test plan activation observe the following safety precautions:
^ The convertible top must be in the down position (Top Open)
^ DO NOT stand over or near the rollover protection devices prior to or during deployment.
Mechanical Deployment (For Service)
Prior to servicing, repairing or removing the URSS the rollbars must be deploys. If it is not possible to activate the system with the DIS plus or GTI, the emergency mechanical release should be used.
1. Open the Convertible top
2. Trunk open
3. Remove the baggage compartment floor mat and bulkhead cover
4. Insert a hook device into the opening of the crossmember until you reach the actuator.
5. Insert the hook into the hole in the actuator and pull the release lever
E64 Seat Bolts SGS
The seat and SGS system of the E64 are identical to those of the E46 Convertible.