2006 e60, 145k. I put a new ca battery in the car about a year ago but it was having increasing trouble over the last few weeks. Finally it refused to start the car. I tried charging it but the voltage never got above 12.0, and so i took it back to advance auto who gave me a new one, an Autocraft Gold, size H9, 950 cranking amps. I brought it home and charged it on the smart charger, and the engine still won't turn over. I tried adding jumper cables from my 4runner and still nothing. The electronics come on. The brake pedal does not depress very far. Carly gives me 4 codes, transmission 0054c6 (i changed the transfer case fluid but haven't figured out how to reset the code), ac motor control 009c54, instrument cluster 00a468, and a brake code cause one of the sensors is busted (on order from bmw). The instrument code says there is a break in an external cable, with no ldvs signal, and in energy saving mode, but the computer still seems to work. Suggestions???