After several queries to and replies from Lincoln, I have been told to follow the procedure on pages 269-270 of the original owner's manual which can be
downloaded here. I asked why not the significantly different procedure listed on page 270 of the
"Owner's Manual Printing 2" (listed on the same web page), and despite several requests to several different persons both in emails and in phone calls, I could not get a straight answer.
So I am following the directions in the first owner's manual, but I am very troubled by the differing procedures and the inability of anybody at Lincoln to explain these differences or the reasons for them. To date the car tows well and I have had no problems with it.