Hi,

On my 90 300E, the alarm module is beneath the passenger's feet. Remove carpeting and look there.

I do not have access to my CD ROMS but the alarm module is small compared to the other modules I found there. It has two connectors that plug into it. I removed both while repairing my radio.

Do a search on 124 wireless alarm. You may find another solution.

Good luck,

chicago124