Dead Battery S-Tronic stuck in Park

My battery is completely dead and my car (A3 2.0T S-Tronic) is stuck in PARK so I am unable to push it out of my garage to jump start.

I don't own a battery boost charger, I only have a trickle charger. My idea is to leave it for a good few hours to charge with the trickle charger in the hope that I can engage the ignition and get it out of PARK.

Does anyone else have any other ideas?

Sadly I don't have home start relay.

Also my battery is only 10 months old and I am a bit surprised it has lost so much power. I know it has been very cold and the car hasn't been used for a long run since Xmas, but I used the car for a short run 2 weeks ago. I did at the time feel the car hadn't jumped into life, but by the time I had used it for a few miles it seemed ok. My concern is that something is causing it to drain, but I can't think what?

Any help and opinions very welcome.

Cheers
Chris

I managed to manually switch the gearbox into N with the help of the manual.

I did attemp to push the car our of my garage but my drive was too steep for two grown men (maybe we need more Weetabix) so it's now on a standard battery charger borrowed from a friend to hopefully charge over night.

I think I may need to get the battery checked as I feel that it should have held its charger for longer.