I've lost track/can't figure out what side of the flow-chart you would go down. So I can't predict the outcome.
But I think it would take a brave man to do either side as you are changing (parts not all) of the contents of the cluster plug and may invalidate the warranty.
I would imagine if they can programme eeproms they could perform the cluster test and/or DIS coding. If it was me I'd plan a day out to their neck of the woods and have them do it for me. Or leave it until the warranty is up.
And don't forget, the flow-chart is assembled wisdom form other forums, I believe it to be correct but have never tried any of this myself.