So just for kicks, I was playing with the OBC on my E46...
Here's the gauge-check:
Here's a battery voltage check...Do I need a new battery? you can see from the video how it changes from 11.3 or so to 14 upon starting...
You can access a whole lot of engine data with this OBC function such as actual coolant, engine temp, etc., fuel usage history, etc etc; Here's the list:
http://bmwclubuae.com/forum/archive/index.php?t-1507.html
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