I have and E46 328i and I have driven it in about a 1 1/2 months, so i get back and i start the car, but nothing happens I can't even open the doors, so i manually open the car a with my key, so i open it and then i try to start it but nothing happens, no lights no nothing. I then had my friend up start the car for me, and it turns on just fine then, but then I come back home and park the car, and 45 mins later i come back and try to start it, the lights light up on the dash, and when i try to start the car the headlights light up, and it makes a clicking nosie like it trying to start up, and then it just doesn't turn on, I then left the car running for 45min after another jump start, to try to charge the battery, i then shut the car off and i go back inside to get something to eat, a half hour later i try to turn the car on and it doesn't work again any but the head lights light up when i turn the brizzare i thought, any ideas i really need help.

It sounds like you've got a bad battery that won't hold a charge. Most any place that sells batteries can load test your's to prove that's what the problem is.

Thx bro I changed the battery it works now, but the new battery is a lot smaller than the bmw battery, i just bought it at a car part store, its an exide battery