Car Leasing – Do everyone rate in advance?

Hello dear forum, I have a question. And I would like to lease a car for about 12 months. But unfortunately, due to a few stupidities of then no clean Schufa and no regulated income. However, it is not that I am quite poor. The car I would like to lease should be a used car and cost the rate approx. 1000-1300€. Is it possible if I pay the complete leasing rates for a year in advance that I get the lease approved I mean the Schufa and the proof of income are also mostly used to make sure that I can pay the installments, so the leasing bank doesn’t have to worry about it at all and has even greater security because everything is already paid in advance. So is more like renting for a little longer time. I can’t buy the car in a bar, I can’t afford it. Would only like to know if that’s possible from you. At the moment I’m driving a BMW E60 Thanks