Hi, I have had my 2004 Copen for 2 years and am delighted with it. However I left it undriven for 3 weeks recently and the battery went flat. I have recharged it but the key fob still won't open the car. I have replaced the battery in the fob. I am completely ignorant of car electrics but I had an immobiliser problem with my Subaru Legacy last year which resulted in the car being written off so I am nervous of putting it into the local garage. Has anyone any advice?