I have done this a couple of years ago.
The German Automobil Club "ADAC" send me spare-parts to Ankara Airport.
The german mechanics (garage) gave the spare parts to ADAC office
at Munich airport. One day later it arrived on Ankara aiport.
(send with a passenger plane, Lufthansa)
It only takes 1 day from Munich Airport in Ankara. Great !!!
But to get the package out of the customs takes the whole day.
I startet at 8.00 clock in the morning at Ankara Airport
and finished at 17.30 Uhr. The turkish people were nice,
but many, many papers.
My problem was:
My parcel was to expensive and I had to pay tax for it.
So i Was told to go back from airport to Ankara city again
to make an official tax number.
That takes a lot of time. (ramadan was at this time too, office closed ... and so on)
But on the other hand, I was really lucky too.
I found a private transporte for going to the tax office in the city of ankara. This turkish guy was great !!!
He helped me with allt the tax-papers, drove me to a foto shop (to make a picture from me), takes me to a copy center ....
and drove me direct back to the airport.
Many thanks again!
If I can help you, let me know.
Just send me an e-mail in german.