Hello,
I will be arriving at DUS on LH, transferring to TK for a flight to Istanbul. I have never been through any DUS terminal other than A (Lufthansa), but it appears that TK operates from the C terminal.
I have 2 hours connecting time and I am traveling in business class on both flights, so should be first off the plane. Based on this thread, this seems like plenty of time, but if anyone has any experience connecting from A to C let me know if I am overlooking any issues.