Travel: Off the Map - Renault Scenic "No Maps Found"

One of the features of our leased car is a TomTom navigation system. She speaks to us in dulcet tones about 'taking the motorway' and 'take the exit, turn left'. Except when she doesn't. It seems that whenever we are on the move, she looses her maps. Well, she's lost 'em again. For days this time. I did buy quite a number of maps and map books, but the tangled mess of some EU motorways would be impenetrable if not for her assistance.