for me it seems to be a driving style thing, i have an 05 3.0d and if i come to a sharp stop, as in peak hour traffic it will intermittently slam, from what i have experienced it seems as though the trans is hanging onto 2nd gear, thinking that the car is going to want to speed back up, once it realises its stopped then it selects 1st gear with the accompanying hard down shift, what i do is either slip it into neutral just as i roll to a halt or alternatively put the stick in sports mode, but this can be a pain in stop start motoring as it hangs on to each gear to long

as i said for me its a driving style thing,

Ewen