Last week I went out to my Tiguan and found the key ( and any of the extra keys ) would not turn the ignition switch. I've had the car for 6 months and about 7K miles so I do know how to work the key. VW roadside service came out and played with it for 10 minutes and was about to give up when the driver somehow was able to get the key to turn. I took the car into a local VW dealer. They were not able to get the switch lock up again but said they found error code P150A and installed a ECU update per TSB 2014603 and said they had solved the problem. I am skeptical, not too sure of the " fix" and don't want to be stranded. Any ideas?