OK, so I left my dash cam running and it has totally flattened my battery. So the bonnet won't open, but I applied a charger to the red post in the fusebox and earthed on the door hinge. Now, I realised I have been using the door key for 6 months because my remote battery went flat, so how do I open the hood? (seems the normal floor-mounted hood button does not operate under these circumstances. Any ideas, please?