I get this issue with the door handle touch pad on occasion and it is usually after I have washed the car. the KESSY is designed to shut down function to the door pads if there has been a unusual amount of activity in a small amount of time. I assume it is a security function to prevent how many attempts are made to gain access to the car and I have found it takes a few driving cycles or doing what largecar said to restore its function. The only way I have been able to prevent it is to keep the key in my pocket which leads to repeated horn honking as I was the car.....a real PITA.
I have spoke to others regarding the no key on the MFD. My car seems to be VERY sensitive to where I place the keys in the car. If i throw them on the pass. seat and they move too far away from the shifter I get the message...same if i put them in the arm rest storage bin. I recently found the interior KESSY sensor when I was installing my LI laser jamming system. It is under the center console bin and I was able to see it when I removed one of the switch blanks near the start button to install the on/off switch. I would try placing the key fob in the center tray and see if the message goes away. Then experiment with ranges from that area and see if it is possible your car is like mine and the key needs to be close to the sensor. If it plain old wont go away then I would contact a dealer and have it figured out. the real puzzle is that if it truly had a "no key" issue then you would never get it started.
FYI if you would like to see what the keylesss sensor looks like open your trunk and look on the overhead of your trunk...when you see it you will know it cause it looks like "a sensor" haha.
IRT you fuse question. VW doesn't give you a fuse map with your book because of all the mid stream production run changes. The only way to get that info is to go to the service desk of a dealer and give your VIN and they will print you up a map....mine was about 12 pages but at least it is specific to my car and leaves me without questions.
So a little much I suspect but hopefully it helps. Matt