Is it possible to alter the points at which gearchanges occur? I have a 2.5TDi Quattro Avant tiptronic (5 speed). The car changes into 4th when I hit about 32mph, and changes down to tird when I reduce to about 27mph. The problem is that in town it tends to be in 3rd a lot of the time and to get it to upchage I have to accelerate to 32 then back off to 30, and if I am slowed down at all it changes down. I can override the up changes manually but what I would like to do is allow the transmission to change down at lower revs (it seems to drop a gear at about 1050rpm but with the diesel it will pull happily from lower than this).