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Hi,
Yes I am leaning towards the switch - hence why it sometimes works.
On the Euro cars, the alarm has a battery - so if you just disconnect the main battery the alarm will go off and off and off.
So you have to put the ingition 'on' to activate service mode - and then disconect.
I tried this while that car was giving me airbag errors and it would not go into service mode.
So I took that as a clue that fuse E1 was not doing it for the Airbag or i32 or i48 (it too tossed a 25 code but with different text).
Once I got the airbag and the E1 talking, I could put the alarm into service mode.
So I pulled the alarm/immobiliser stuff from under the seat and cleaned all the connectors on the black lead, just cause I could. They were all pretty clean anyway - a little oxidation perhaps.
I see that you can get the switch from about 10 [insert currency] where ever.
Or you can pay Porsche 240....
I will get a Meyle part or even the VAG part for pennies and give that a go.
Just hoping it is not anthing todo with elcectrolitic capicitors giving up the ghost.
I read a post by a proper engineer on how to solve that - scares me.
Cheers
Adrian
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