I recently purchased a series 3 diesel. The problem i have is that its stuck in fourwheel drive in high range. When i drop it into neutral and try to select high range again i can't unless i press the yellow lever however this means i am in 4wd. Not good for tyre wear and winding the transmission up. Can anyone shed any light on my problem. The vehicle is curretly stripped to the chassis for renovation so every thing is accsesable.