Here's a pick showing DG in the middle.
This is before cable replacement. The corresponding mate had a piece of tape I think.
If the pic doesn't turn out look for the blob of yellow label - it's marked DG at the rez I can see it with under the intake - speed sensor cable side.
HTH
PS..in German...(from Wil Ferch)
BG = Bezugsmarken geber ( reference mark identifier or "giver")
DG= Drehzahl geber ( revolutions identifier or "giver")
