Was looking at the Skoda Owners Facebook page today, and a member Mike Holroyd seems to have finally sorted the issue with the dipping passenger mirror. I know other members on here have struggled to get this coding to work on their Octavias, so I thought I would post this, if it helps.
Credit: Mike Holroyd
"Passenger mirror dip in reverse - Octy 3 (MQB)
Had a play with VCDS on the Leon this afternoon (same as the Octy3) and finally managed to get the reverse gear passe