What I would do is try and save as much money as possible.
Before going to the dealer re-install your old cluster and leave it just pushed in to the dash. Do not put all the screws and other parts back on.
In that way he can take the mileage readings from the old one, then unplug it and plug in the new one and transfer the data.
Before going to the dealer re-install your old cluster and leave it just pushed in to the dash. Do not put all the screws and other parts back on.
In that way he can take the mileage readings from the old one, then unplug it and plug in the new one and transfer the data.