[Hurdigurdiman]

My 99 C2 had an electrical prob from first buying. The inside lights, doorlights and petrol door all not working. Although I could put the inside lights on manually. I searched for 18 months and eventually found from a forum that the Alarm Modual had in fact 'slipped back into transit mode' .. I took it to a porsche dealer who ran the Porsche diagnostic testers on it. I told them to look in the special menu (i got that info from a forum) of the alarm modual under the drivers seat and take it out of transit mode. They did and all started working as normal. That cost me $80 at the main Porsche garage in Lancaster PA. Ring Porsche and ask them how much it would cost for them to run their testers on your alarm modual. It could be that at fault as your Master Dealer friend suggested.