Kestas,

Yes a Cabriolet, I just wanted to warn folks it's not on the left side as I thought you experienced while removing and disconnecting it. I found that out after removing the CD magazine on the left side and all the associated panels above the area behind the wheel.

I found it on the right side mounted on top of the metal panel and just behind an easily removable soft panel. It looks like the ATA in another thread and the number comes up for me as the alarm control unit here

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'94 E320 Cabriolet, 110k, black, stock, SOLD
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'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion