Bests & Worsts Reviews from Amazon

I downloaded the App from the iTunes Store (FREE) and installed it on my iPhone SE. The download and install went perfectly. The first test was on a 2013 Chevy Silverado pickup that had the Check Engine light on. I scanned the codes and the error was in the "Vapor Recovery System". I was already familiar with this error but the trouble-shooting guide recommended checking the gas cap. We tightened the cap, reset the code and the Check Engine light was gone and has not returned for one month. I leave the module plugged into the OBD2 port on my 2011 Mercedes GL350 (Diesel) constantly since I purchased the BlueDriver in June, 2017. I tow a trailer with the SUV so it lets me monitor the engine as we travel. I am a Mechanical Engineer that studied Automotive Engineering at Oregon State U. (1972) (Beavers) so I was not intimidated by the 70+ parameters that were supported in the logging mode. I love the real-time logging feature so I can monitor Engine Oil Temp, Boost Pressure (absolute), Fuel Useage(GPH), Boost Air Temperature, and Atmospheric Pressure. I am towing the trailer again this week with the real-time logging running, when yesterday, on hwy 93 in Idaho, the middle of nowhere, the engine dies! We miraculously find a place to safely pull off the 2-lane (no shoulder) highway and my wife starts calling our subscription towing service, I look at the BlueDriver app now that we are stopped, and I can now see a warning that the fuel pressure is low. I can smell diesel also so I know there is a leak. I open the hood, remove the pretty cover (so I can see what's going on), and I have my wife start the engine. I can see fuel gushing out, I yell STOP!! Thank goodness it's diesel as it is hot today. I get an update from the towing company and they will be there in 10 hours. I start looking for a broken fuel hose/connector. I find that the connector is good but the wire clip has come off the female side. I look around the engine compartment and I locate it, I retrieve it, re-install it, and put the connector back together. My wife re-starts the car, no leak, so we put on the pretty cover, cleaned up with simple green and a paper towel, and head down the road. All thanks to the BlueDriver that was plugged in, logging, and told me where to look!