the tiptronic boxes change gear electrically (pistons engaging gears) because stood so long pistons might be seized you could try selecting forward and reverse gears whilst engine running to try free them up failing that needs to go to an auto box specialists who specialize in tiptronic boxes (
expensive )
peesian
May 2010
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.