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      12-14-2012, 12:45 PM   #2
Tipper
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Drives: 2007 E91 320d SE auto
Join Date: Jan 2009
Location: Devon, UK

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I have a 'Scangauge II' which you can set to show a range of OBD data such as coolant temperature, battery volts, inlet air etc.

It plugs in to the OBD port just in front of the drivers door. Not sure if there is any other suitable connection but I think not.