Dear @Sandeep,
thank you for your question in the community.
As for your question I did some research and found the following:
https://***.sixtblog.de/reisetipps/gueltiger-reisepass-an-der-grenze-und-fuer-ihren-mietwagen/
They ask for a proof of your Identity, if they will accept the Aufenthaltsgstattung you will have to maybe go to the nearby one in the city your are living or give them a call under : + 49 (0) 89 66 060 060
I hope this helps you, if you need further questions please do not hesitate to reach out to us.
Best regards,
Nilab