Here's a video showing the Hind with Luftwaffe markings/camo scheme being flown. They actually had them until (Checking dates.) sold to Poland and Hungary. Luftwaffe JG 73 flew the MiG-29G (NATO standard.) until ~2004 when they were sold to Poland. JG 73 flew them as an aggressor squadron but was also assigned an air defence role as well. Many of the former DDR aircraft flew with the Luftwaffe for years especially the transport aircraft that filled a deficiency in the Luftwaffe capabilities at the time. Germany just about RESET the MiG-29s to get them to the NATO "G" Standard, Hinds, Transport to even improve the depot level maintenance of the older MiGs they got. All DDR aircraft were serialized, painted and marked into the Luftwaffe system. I suspect the HINDs were used, but I'm still snooping around to find something more solid.
http://www.youtube.com/watch?v=DybJDlMqCGw
I'm finding "breadcrumbs" so I'll follow the trail a little longer concerning the HINDs, MiG 29 and later MiG 29G as upgraded along with the larger Transport aircraft are a definite yes. The MiG 24/or 25 (Can't remember now.), MiG-21 & 17 and other aircraft though maintained were either sold off or scraped with no record that I have found to indicate they were actually ever used by the Luftwaffe.
http://www.euro-t-guide.com/See_Coun..._Gatow_3-1.htm
Regards,
Pat