Allocation/Euro Delivery question

I recently put a $500 refundable deposit for the #1 allocation at a dealership in the area. The problem is I would be doing Euro Delivery in Sept/Oct of 2016 (getting married in Vienna), and wouldn't be able to order the car until 6 months prior (around March). How do I ensure that I am able to order a car around March? The dealer basically told me even though I am #1, they will have to move me out because I wouldn't be ordering right away.

Just afraid I will lose an allocation as I have to wait....Any suggestions?

Allocation/Euro Delivery question