Engin runs but car won't start

First find out the code then try to fix.no code you do not know.

not sure what you said but.
seems the battery is discharging,? 12.6v is fully charged,
own a voltmeter?
try a good loaned battery , does it start the car,?
i think you meant?
i can jumper cable start my car at any time. (off another running car)
but after running my car, the battery discharges and it will not crank at all. right?
this means ,the charging system on your car is bad.
if the starter cranks great, then the engine is flooded or is in great need of a tune up (sparkplugs etc)
if flooded try the super secret in the op guide, crank with throttle wide open , this magic trick cuts all fuel injection allowing the flooding
to purge away, and eventual starting.
my guess 2 is the car wont start, so you crank the battery flat
you jumper start it and it runs. (luck)
then day 2, same deal cranks ok but wont start.. ever tune up the engine?

can you move it by hand?what noise do you hear when trying to start.
is the gear from the starter full in the motor.are all wires connected.

common problem with these engines are the ingnition modual located under the coil packs!

You replaced the Hall Effect Injector Switch in Distributor

Now you need to set it with a volt meter.

V6 or V8?

well there is a fuel pressure regulator which keeps pressure on, even while engine is off. i would suspect it is bad, or you have something else leaking pressure off while the engine is not running.

If there is a dipstick, add the proper fluid to the dipstick fillter tube. If there is no dipstick, there are drain plugs on the side that will have to be removed to check the level, at normal operating temperature.

Maybe check autozone.com for further information. There are two brands of transmission used in the BMWs of that era. ZF and GM transmissions. There are also a number of types of transmission used in the BMW 525i vehicles.

Check online for a service bulletin regarding the automatic transmission used in your vehicle, or check with the dealer.

I found a service bulletin that's in black and white, but it was not pastable to the fixya.com website.
Sorry, about that.

Good luck on finding a solution to adding transmission fluid to your 1992 BMW 525i vehicle.

it is on the drivers side of the engine right where the engine and transmission meet.

On the driver side of the transmission pan there is a fill plug. The car must be in the air and level. With the car running fluid will run out of the plug hole when it is full. This is no fun without a lift.

The fuel pump is located under the back seat on the passenger side. You will find an access cover and will need to remove the screws. You should be able to listen for the pump while someone cranks the car. Also I believe there is a large green w/ blue trace wire and an equally large brown wire at the connector. Check for battery voltage across the two wires. The fuse for the pump should be in the fuse panel under the hood.