Quote:
Originally Posted by cszekl
I have read that warning in the manual also. That’s why I asked the dealership advisor. The positive and negative Terminals under the hood are the same terminals that are on the battery in the trunk under the carpet. So, the
Terminals under the hood are an extension to the battery in the trunk do to design location. No issues can happen to the 12 volt system when using a Quality battery Tender and pigtail off of the battery.
I made sure my dealership approved of my set up. I think maybe we over thinking things here. Maybe a BMW tech could chime in on the topic.
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I think charging from the jump terminals under hood provides extra surge protection for the rest of sensitive electronics in the car, while charging directly through the battery terminals does not.