Brief description of components: Notes
The anti-theft alarm system receives input signals from the following components:
- 4 microwave sensors
The microwave sensors monitor the vehicle interior. Movement is detected if the reflection (echo) of the microwaves changes. The sensitivity of the microwave sensors is adapted for different conditions (e.g. vehicle model, installation location of microwave sensors).
For more information, refer to E63/E64 MICROWAVE SENSORS .
- Tilt alarm sensor
The tilt alarm sensor monitors the vehicle's horizontal position (inclination in longitudinal and lateral directions).
The signal from the tilt alarm sensor is evaluated by the DWA control unit. The tilt alarm sensor detects when the vehicle is raised or towed away and triggers a DWA alarm.
For more information, refer to E63/E64 EMERGENCY POWER SIREN WITH TILT ALARM SENSOR AND DWA CONTROL UNIT .
The following control units are involved in the anti-theft alarm system:
- DWA control unit
The software for the DWA is integrated in the emergency power siren. The DWA control unit in the emergency power siren controls the anti-theft alarm.
The microwave sensors are connected to the alarm system control unit by a single-wire bus (K bus). The DWA control unit is connected to the K-CAN.
For more information, refer to E63/E64 EMERGENCY POWER SIREN WITH TILT ALARM SENSOR AND DWA CONTROL UNIT .
- Car Access System (CAS)
The CAS monitors the central locking system.
The bonnet contact switch is connected to the CAS. The bonnet is thus monitored (open or closed). The CAS feeds the signal to the DWA control unit in the emergency power siren via the K-CAN. The CAS supplies the following signals:
- Boot-lid unlocking via remote control
- Key in ignition starter switch or terminal 15 ON
- Status of convenience opening/closing
- Authentication by CAS as protection against manipulation
- Driver's door module (TMFA) and front-passenger door module (TMBF)
The door modules provide information about the position of the door contacts. The signal is fed to the DWA control unit in the emergency power siren via the K-CAN. The driver's door module also provides the signal from the lock cylinder.
- Body basic module (KBM)
The body basic module monitors the boot lid (open or closed). The signal is fed to the DWA control unit in the emergency power siren via the K-CAN.
When the boot-lid lock is mechanically unlocked with the key, the DWA alarm is triggered.
- Light module (LM)
The light module actuates the lighting system for the visual DWA alarm. The DWA control unit feeds the triggering signal to the light module via the K-CAN.
The following actuators are actuated for the anti-theft alarm system:
- Emergency power siren with integrated tilt alarm sensor (SINE)
The emergency power siren emits the acoustic DWA alarm. In addition to the DWA alarm, the emergency power siren can also emit an acoustic confirmation signal when the system is activated or deactivated (can be set on the Central Information Display (CID) and controller).
- DWA LED
The DWA LED is on the bottom of the inside rearview mirror.
The DWA LED gives a visual indication of the status of the anti-theft alarm.
The DWA LED is directly actuated by the DWA control unit in the emergency power siren via a wire.
The following indications are possible:
- DWA LED off: DWA is deactivated.
- DWA LED flashes (frequency = 0.5 Hz): DWA is activated.
- DWA LED flashes with a frequency of 2 Hz for 10 seconds and then continues with a frequency of 0.5 Hz:
DWA is activated but a door or hatch is not closed or a microwave sensor is defective.
- DWA LED flashes with a frequency of 2 Hz for 5 minutes and then continues with a frequency of 0.5 Hz: Alarm.
- DWA LED lights up for 2 seconds and then flashes with a frequency of 0.5 Hz: The microwave sensors and the tilt alarm sensor are deactivated.