Hallo!
In GenQu this loss is registered as follows:
http://www.aviationhistory.no/ref_db...?lossid=124798
13./N.J.G.6, not 13./N.J.G.2 - I do not know which one is correct.
On the dates you mentioned I have about 150 losses registered, and cannot find a direct match on the locations you mentioned directly.
Assuming you are working primarily on Nachjagd, I have 11 Nachtjagd losses on these dates, the one which might be the one you are looking for is this:
http://www.aviationhistory.no/ref_db...?lossid=123543
although the location 'südlich Echterdingen' will place you approx 120 km from the area you mention.
Regards,
Andreas B