I've read the article for boosting the range of the remote for the A4. http://www.audiworld.com/tech/elec.html

I have a 2.6 Avant (b5) and it is mentioned that the alarm module is situated under the rear seat. Today I removed the rear seat, all I found was wiring loom and a smallish silver box with a multiplug attached. Is this the alarm module ? I could'nt see any single black wire comming from it, unless it is wrapped up in the loom.

Any help would be apreciated