I had this with the ML. It had a private plate on it and the dealer was clueless. That should have been a warning to me.
I believe you need to change the plate off it and get the V5 first. You can do this online but you will need to wait for the V5 in the post.
Once you have the V5 with the normal numberplate on it you can then use the ID number on the V5 to do the change of ownership on the interweb or post off the little slip.
