Hello W!
"The alarm is a black box under the passenger footwell. Remove both matts and then the black metal cover and you'll see it. In many cars, the alarm will say "Becker" on it. "
Aww my! Thanks for the info. I've come across that box and somehow thought it was used as alarm for the on-board radio (going off should someone take it away), since it had Becker on it. Also, I kept thinking I knew why a Mercedes cost so much since they used an entire box full of electronics to protect a radio
I'll follow your advice today and will let you know.