trans. fluid

Installing a sending unit for an AutoMeter A/T temp gauge. The instructions say to install the sending unit into the transmission test port, but looks like the X has two of em? Any idea which one would be best for the most accurate temp reading? FSM diagram: These are technically line...

I am the new owner of a 2010 S automatic with 90K miles on it. Checked the fluids on purchase (from a BMW dealer) and they all looked good. It surprised me to find clear trans. fluid! Not just clean, but clear! Is this Matic S or maybe BMW Trans. fluid? I won't bother flushing the trans. if...