Another source for Alfa 164 tech answers is:
http://www.digest.net/alfa/FAQ/164/
http://www.digest.net/alfa/FAQ/164/notes0.htm
http://www.digest.net/alfa/FAQ/164/notes40b.htm#sheat
Above example seat heater notes: Alfa 164 Notes
http://www.digest.net/alfa/FAQ/164/
http://www.digest.net/alfa/FAQ/164/notes0.htm
http://www.digest.net/alfa/FAQ/164/notes40b.htm#sheat
Above example seat heater notes: Alfa 164 Notes