How would you translate
Please call me Bill.
Would it be
Bitte nennen Sie mich Bill.
Bitte heißen Sie mich Bill.
or some other verbs?
It would be:
or even more unformal (f.e. to a friend)
"heißen" today is used only in the following verb construction: "heißen" + name: Wie heißt du?
something like that you will only find in older literature.
In the above situation I would say, if you use "du":
Wenn you say "Sie":