the other day I was hearing the high pitch sound outside it would come and go, it eventually just made the sound continuously that’s when I figured out it was the crossfire.
I disconnected the battery and the following day connected the battery back no alarm and it started up right away. I left the battery connected and in a couple hours the alarm was back at it.
Is it skreem or something else.

 

I had the same issue. It turned out it was the alarm itself. Maybe it was the battery inside the alarm, but when I totally replace the alarm, it stopped doing that. I suggest that you just bite the bullet and replace the alarm.

Jim

 

The alarm siren is under the cowl in front of the windshield. Either replace it or unplug it.

 

where can I purchase one?

 

Search for MB part # A 219 820 32 26

 

A few years ago I had the same problem and solved it by removing the siren. You will lose the lock/unlock chirps without the siren.

FYI You need a puller to remove the wiper arms. There's another thread that has guidance here on the BB.

 

thanks