Did you say you picked up a quality scanner? Nt510 will read live data for the coolant valves and the heater cores it's very helpful.
It also helped me solve a mystery that was bugging the crap out of me: why does my car have a heartbeat!?
If you listen close while engine is idling, and ambient temperature is 40-50F outside, you will hear an obvious lub dub sound exactly like a heartbeat; it turned out to be the heater coolant valves opening and closing.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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