1989 bmw lost all power!!!

Hello all, I backed my car up about 2 feet and it shut off completely! no power to anything in the car. the car doesn't even make any noises when i try to start it, no crank not ticking nothing! i checked Relay fuses under the hood and all other fuses and all are good. I bought brand new battery and still no power, i even was given a jump and still nothing!

sounds like a bad ground. check all your ground connections. also check your battery wires arent frayed anywhere and grounding to the chassis.