1999 Slk230

[Sid The Kid]

Hi Guys
It's been a while since I've been on the forums....my SL hasn't been giving me any problems for the longest time so far...must say I'm very impressed .
But now, we just bought a SLK230 and my wife woke me up one morning because the alarm would go off and just wouldn't start. Both the original and spare key wont turn off the alarm and even with a new battery. I even went and replaced the car battery aswell. Basically the car won't start cuz the immobolizer will cut it off, the alarm goes off whenever you open the door, trunk or hood. and wne u disconnect the battery it would make a non stop humming sound, but now it doesnt do that anymore. However whenever you try connecting the battery in the alarm will just go off. I looked at the PSE Module in the trunk but couldn't find any water damage.....however the wires were very stick....could be from water previously getting at it. But its weird cuz its been sunny and starting everyday except all of a sudden that one day.
Any suggestions......I cant even move the car or plug the battery in without the alarm going off. I even removed fuse 9 so the alarm wouldnt go off, but the symptoms remain the same without the noise. Any advice will be greatly appreciated.