This is for all 250 Cal owners....you probably know it already, but it is a useful reminder even if you do.
Mine had been in the garage, unused, for a couple of weeks. A nice sunny, dry day (but cold) came along and I thought I would take the car out of the garage and give it a pre-winter clean.
Jumped in, went to start it and, oh no, I had a totally flat battery. It was probably my fault as I had been messing with the interior courtesy light (I will investigate).
Now, as we know, with a flat battery you can't open the boot to get to the battery...so what to do, as I have not fitted a mechanical release, as some of you cleverly have.
Any road up, I remembered reading in the manual that you can charge the battery from the front, from under the bonnet. Sure enough there is a connection on the right hand side for the plus side of the battery, and then you just earth on the metalwork.
Managed to get some charge into it, even though it was flat as a pancake, and all was well.
The moral being, as long as your bonnet catch does not fail at the same time (highly unlikely) you can charge the battery from the front of the car and get yourself out of a sticky situation.
I have now ordered a battery conditioning charger, that I shall attach to the battery, and drop the plug out of the hole that is in the boot, that used to be for dropping the spare wheel.
Nightmare averted.