On the Mercedes Benz official website there is a feature on Turkey, more specifically, HAS Turizm, a bus company headquartered in Antakya (Antioch). Along with the expected Mercedes-Benz slant, the article contains many useful insights into the Turkish bus system, one of the best bus systems in the world.
The 4-paged feature article is here. The links to each page are on the top-right of the article.
If you are interested in Turkey I recommend you read it!