Today a police spokesman said police were still working out how to extract the vehicle.
"There are a lot of factors that have to be taken into account."
Meanwhile, police were continuing to conduct land searches and inquiries into where the pair might be, since there was no indication that they were not safe, he said.
Michael left James Hargest College's junior campus during a lunch break with his stepfather.
The school's principal Andrew Wood said it was "perfectly possible" for a student to leave the school unnoticed.
Mr Beckenridge is also known as John Robert Lundh, Knut Goran Roland Lundh or John Bradford.
Michael is of solid build and of Asian descent. Mr Beckenridge is 1.75m in height, of medium build and of Swedish descent.
Anyone with information that might assist in locating the pair should contact the Southern District Command Centre on 03 471 5002.
Information can also be provided anonymously to the organisation Crimestoppers on 0800 555 111.