the vw service diagnosis book i have says this about the Digijet
(83-85 watercooled) air flow sensor:

connections at
air flow sensor
(terminal nos.)       description
specification

6 and 9                 potentiometer - total resistance
500-1000 ohms
7 and 9                 potentiometer - resistance               ohms
change as sensorflap is opened
                               measure through wiper arm
(flap must move freely)
6 and 22               intake air temperature sensor          ohmmeter
reading should correspond to graph

shown.

trouble is, i didn't think there were 9 connections at the air flow
meter, much less 22 connections. :(

hope it helps.
joel