One of the functions of the BEM is to cut off power rails when neccessary to preserve battery change. 2006 MY BEMs didn't suffer the problems of earlier ones.
I have had similar issues and fitted an AGM battery and recoded and only had problems since when leaving the ignition on by mistake. I don't think two weeks is that bad if it still starts (even reluctantly), afterall it has an alarm and keyless entry to run.
I have also found that leaving VCDS plugged in when turning off the car and then unplugging it seems to cause a battery drain. Always close the controller and unplug while the ignition is still on now.
|