Prussia/Germany held a 'Special Relationship' with the Ottoman Empire through out most of it's existence. It was about the only true 'Reliable Friend' the Prussians, or the Ottomans, ever had. They were conveniently separated by that big mutual enemy/nuisance the Austrian Empire. In short, they could afford to have that special relationship.
Sorry, I was talking about the relationship between the US and Germany, not Germany and the OE