DLR Test in Germany for SunExpress -
afaik - in English or German.
DLR is hard. Very. There is plenty of software to prepare for it though. Not sure what is tested at the SunExpress one.
If successful there'll be a sim check (and at least one?) interview in Istanbul with SE people.
Not too shabby if you fancy a 737 TR (paid for by company with bonds I believe) and don't mind moving to Istanbul for a few years. You'll probably be flying a whole lot of hrs per year aswell - especially in the summer months.