I have been chasing down a nasty battery drainage issue which kills the car if parked even 48 hours. It's almost untraceable, since when I measure the current off the battery when parked, it always falls to 0.020 A after a few minutes. The car charges up fine when driving, the battery is up to 12.6V when parked right after a drive. And it's a new battery.
While I haven't actually resorted to sleeping next to the car and measuring amperage over the entire 48 hours, I am totally lost as to where to look for the power draw - it must be at least 2A or so. I have checked current at the fuses too, but most turn up with nothing after a minute on the meter.
What are the usual suspects on the M5 for battery drainage? All interior lights are good, by the way, including the trunk. I do notice that with each disturbance, i.e. hood switch, trunk, door, etc...I get a 1A or so reading, which tapers off after a minute...assuming that is the central locking/alarm system.
While I haven't actually resorted to sleeping next to the car and measuring amperage over the entire 48 hours, I am totally lost as to where to look for the power draw - it must be at least 2A or so. I have checked current at the fuses too, but most turn up with nothing after a minute on the meter.
What are the usual suspects on the M5 for battery drainage? All interior lights are good, by the way, including the trunk. I do notice that with each disturbance, i.e. hood switch, trunk, door, etc...I get a 1A or so reading, which tapers off after a minute...assuming that is the central locking/alarm system.