Quote:
Originally Posted by Igreaves  HI
They're actually ultrasonic doppler sensors (1 transmit, 1 receive).
I have them in my car! They're part of the Mercedes OEM Alarm system.
They're working exactly as intended, from your description. They are however disabled when the top is down. (they won't work reliably in open air!).
With the hood up, or hardtop on, the alarm should sound when triggered by these units. (shown by the LED coming on!)
just my 2 cents worth!
IAN |
Hi Ian and thanks for your reply, I have tried sitting in the car with the roof up and windows closed with the alarm on. Although a red LED lights up when i wave my hand in front of the sensor, that's it no alarm sound or anything. Is there a way that they may have been switched of and if so how do you switch them back again.