They have shorted, practically the air con is still running while the car is turned off so the battery is going flat.
Tried radio parts in west melbourne but they dont have anything either, good customer service there though...
Any other suggestions? Checked with Nissan again today but they dont have anything either.
hmmm... thanks for your help, I'm wondering if this has happened to anyone else.
Also, I must stress to everyone that has a M35 to be careful with the relays in the fuse box as they are easily broken...