Originally Posted by E60 545i SPORT

UPDATE: ran some jumper cables from my wifes car to the front positive and ground connectors under the hood of the bimmer, started the wifes car...let the bimmer charge for about 10 min and tried to start...hesitated a bit and then started right up. got the idrive error...did the left and right turn procedure and error was gone. drove down to battery plus since they had the werker battery in stock, first had them run a test on my battery, turns out the battery was fine (6 years old) and just needed a jump. the rep said i prob left something on overnight...i was pretty sure i didnt but u never know...anyway thanks for all the help and im glad i didnt have to spend the $209.99 for the werker battery. at least now i know everything there is to know about changing batteries on this car for the future due to all the research i did on the subject while i was at work

also a funny convo i had with a local bmw service guy on the phone today.

me: hi, how much do you charge for a battery for a 2004 545?
him: is that a 545(i)???
me: lol yes sir
him: $392.96 installed, you have to buy a bmw battery and only bmw can install it, you cant just buy a battery and hook it up yourself. it needs to be programmed to the car.
me: what happens if i decide to install it myself without the programming?
him: THE CAR WONT START!.... these cars these days are crazy like that.
me: lol ok im on my way!