One thing is odd to me.
He is said to be drifting a lot between Portugal and Germany, even before 2007. The travellers were heading to germany maybe from france over portugal via spain.
For what purpose did he need to look into a map? The Route from PDL to germany (Augsburg-Bavaria) via spain ain't longer, than via middle of Portugal. Okay, Malaga ain't the shortest way, but looking at a map for finding the exit to Malaga or Almeria seems odd to me. If someone knows southern europe highways, that would be him?!
He should have known that route. Especially due to the fact, that he knew AB who registered the Jag on his name. Can't imagine, someone registered a foreign car on his name, without meeting the real owner before.
But route PDL to Hannover isn't recommended via spain. But it is also 13 years ago. No idea, if highways in portugal have been built up by these years.