wish you worked for merc, or carcraft, everyone i seem to encounter to fix my car knows nothing, merc just rang to say they are changin the keys to see if that makes a difference which im presuming it wont.
I think that you are going to have to remove the UK fitted alarm, this wlll be car number 8 or 9 in the past 2 years where this has failed, at some £700 plus fitting its not a cheap job.
the alarm has never worked to be fair. .
£700 to replace or £700 to remove?