986 S problem at idle, engine won't rev and shakes, battery disconnected

[Meir]

Originally Posted by Gorthaur

I read somewhere the EU cars differ from the US cars right on that...

For "frank" do you mean the front trunk?

front trunk = frank

as for the alarm.
disconnect the battery without the ignition key on. worst case the horn will go off. you can always reconnect the battery and disarm the alarm.
if that happens, you can do what you did last time.
please let us know how it worked for you, i worked on Porsche cars for 4 years, i don't recall any spacial behavior with the "European" style"alarm system.
if you got an aftermarket alarm system, that's a different story.