Underwood looks like a 6 month old car, it now has 6300 miles. Battery is 2011 I think. Zero corrosion or crud. I plan on removing and inspecting RCM tomorrow. I have ordered a 2nd key/fob from NeedsWings. Personally, I would love to disable/remove the antitheft, and install my own type of setup, that can be disabled since I installed it. I was shocked it worked for 2 weeks then flaked out.
One think of note, it was in the 3rd level underground parking garage, and a comparable era SLK was parked 20 ft away. I wonder if the other person's fob sent some screwy code to my car. I KNOW this is possible, my co-worker had a Saturn Vue, and when he locked his car, it would set off the panic alarm on a certain Subaru, EVERY TIME, even if his car was not in the garage, we walked through one day with just his key fob and set it off. Just dumb luck that it used the same frequency and code for panic that his did for lock.
Anyway, if/when it happens again, I will try fuses 1 at a time, to maybe find an easier way than killing the whole car at once. PLUS I will keep a 10mm wrench up front, I was going to put tools under the trunk floor, but I don't think I could get to them, no way to open the hatch when in theft mode, correct?
Thanks for all the suggestions, and hopefully it will hold out for Woodward.