Originally Posted by Weasel

For some reason on the E53's that amber light doesn't go off and in NOT indicative of a draw... it pretty much never goes off, ever. It would take an acurate way of measuring amperage down to the miliamp to track down a hidden draw.

However not all draws are hidden, lets say the ac blower fan seems to stay on low after you turn the key off, FSR.... Ok, so that's pretty much the only obvious draw that isn't harder to track down.