Alarm signal horn, component description - GF80.50-P-6020SX
MODEL 221.0 /1, 216.3 with CODE (551) Anti-theft alarm system (ATA [EDW]) up to Model Year 8
Shown on model 221.0
Location
The alarm signal horn is located in the front left wheelhouse.
Design
The alarm signal horn includes:
- Rechargeable battery for ensuring power supply
- Inclination sensor for analyzing vehicle inclination
- Speaker for acoustic alarm output
Purposes of alarm signal horn
- Acoustic alarm output for anti-theft alarm (ATA)
- Automatic alarm output in the event of loss of supply voltage or communication
- Monitoring vehicle inclination for realizing tow-away protection function
Inclination sensor, function
When the tow-away protection function is activated, the inclination sensor determines a new reference position with which the relative vehicle inclination is compared during the activated time period. If the maximum vehicle inclination in relation to the reference position is exceeded, an alarm is output, at the earliest, 25 s after arming. If the vehicle inclination changes very slowly (e.g. leaky tire), the reference position adapts to the current vehicle position to prevent inadvertent activation of the inclination sensor.