Has anyone tried using one of the bluetooth ELM 327 devices --- like the one shown here : http://www.amazon.com/Bluetooth-ELM-Scanner-OBDII-Diagnostic/dp/B004B7YXOM I recently purchased a nearly identical unit (same design, different sticker on top) from ebay. When I plug it into my ODB-II port, one of the 5 LEDs lights up ... and I can't seem to discover the device in order to pair it. There were basically no instructions with this thing. Perhaps I am missing some magic process to put it in discover mode? There are no external buttons .... so, not sure what I could possibly do. Anyhow --- if anyone has experience with a similar device, I'd appreciate any input. It could just be the case that I received a dud ... in which case I'll try to send it back for a new one.