Hallo,
I would recommend to ask in a councelling center for migrants in France because the regulations can be different from Germany, as not everything is regulated by the EU-Guidelines.
As to Germany, if you make a volunteer return, you normaly don't get an entry ban for Shengen area at all. Certainly, in your case you are still in France after your residence permit was expired and it can be noted in your foreigner file, so it can perhaps make some problem for getting a visum next time, but not necessarily, especially if it is a short period.