Quote:
Originally Posted by moonluv810
Just wondering why you wouldn't connect directly to the battery in the trunk and keep the connector tucked in under the floorboard when not in use.
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Quote:
Originally Posted by GixY2K
I believe I read/heard that they rather have you connect inside the engine bay so that the circuit can go through a form of ecu as a safety net in case of someone causing a reverse polarity or something stupid like that, while keeping your electronics (which is now, arguably 99% of a BMW) safe.
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It's probably the IBS (Intelligent Battery Sensor) they're referring to.