Executive, it's a 2014 and have corrected the signature. That was a typo.. Bill, I am a member of the Tiffin forum, but there does not seem to be much activity there. Others, thanks for all the air brake references. I have dome some reading on air brakes, including the parking brake. However, somehow I missed the point about minimum air pressure to release it. I do remember during walk around being told to let the air pressure build to 100 pounds before moving to ensure good braking, but they said nothing about the parking brake. The answer was obvious when I heard it. Luckily, I have not rolled in to a ditch or my barn in climbing the learning curve.