If you are relying on getting a thorough tutorial on your vehicle from the salesman, you have a lot to learn. Not to mention that the salesmen also have a lot to learn as to what they are selling. After purchasing about 45 new vehicles in my life, I realized many years ago about the lack of knowledge from the salesmen. This includes pricing, incentives, financing, options, features, etc. More often than not, I am more thoroughly versed with the vehicle than the salesman. In the old days being educated prior to entering the showroom was a bit more difficult than now. With all of the information available to buyers, you should do your homework on the vehicle you are interested in. In addition, as you mentioned, with the complexity of the modern automobile, it behooves everyone to take the time to review the entire manual as well as to sit in the vehicle with the manual present and go through the entire setup menus of the vehicle so you can be reasonably assured that you know the operating parameters of the vehicle. There are so many complaints on various forums as well as Facebook on so called problems with a particular Brand/Model of vehicle, not just the GCL, whereas the issue is not really a problem, but is a lack of knowledge of the operating features/options of said vehicle.