Surely the logical thing to do would have been to use publicity to find out if residents or tourists still in the resort could identify any vehicle parked there.
Might have been a long shot, but who is to say it might not have paid dividends.
Even back in 2007 people on forums were asking this.. after so much fuss about it on forums I thought the PJ would have done it.
That time the theory worked because it was thought that the person who took Madeleine was the Tannerman.
If someone lifted Madeleine from her bed and took her away her head would be leaning on the person's right arm and her legs would be on his-hers left side. The Tannerman had the opposite. The girls legs on the right and the head on the left so this is how the theory emerged. Someone has passed Madeleine through the window which would change her position.
At that time few things did not match: the moving doors and the dog's trail. The Tannerman's route was different to the dog's route. I think this is why the PJ did not pay attention on who usually parked the car at the point where the dog's left the trail. As if this was Madeleine's everydays route the dogs would follow the route further, all the way to the creche or wherever. But they stopped there.
This is why someione said there must be 2 people, one who passed Madeleine and still had her scent on and the other who carried Madeleine away.
Someone argued that the 'passer through the window' was Kate, because she said in her book she went to that road that night but then the dogs would follow Kate and they never did.
Now, when they have the phone records in combination with all of this I think they can solve it.