I had this same problem about 2 weeks ago. Car had been left in garage for about 4 days, went to start it and there was no power at all. Even the key wouldn't come back out without using the emergency release. Checked by dealer a few days later and all found to be ok, not even a fault showing on the electronic log! I too hope it was a one off as the car is only 18 months old and has 2 batteries. (Should add, it's the 3.0tdi, not the V10).Tregger-Happy said:I had a similar experience last November. The Treg was left on my drive for a week when I'd been on holiday. Battery was totally flat, so RAC came to jump start it. He checked the battery conditiona and the alternator, but found that all were ok. Booked the car into the dealer to have full diagnostic of the drain on the battery and found all were within toloerence. I've had no problem since, but have only left it for a max of 4 nights. After which it started with no problem and the volt meter was reading a perfect 12-13V before I turned the key. I've put it down to a 1-off. The real test will be when I go away next month for a week. Will keep you posted.
I would say that is a duff excuse because they couldn't find the real reason and wanted to sting you for a new battery.AdamYates said:Everything backto normal after cold start and back on hte road again - they have put it down to a duff battery