On the facelift the ballast is under the headlight itself, i had to remove the headlight from the car altogether in order to get at it, its a stand alone box its not attached to the headlight itself its just plugged into the loom, remove the air box un bolt the light itself, remove the small painted trim under the headlight itself, then unscrew the other bolts, now the tricky part is that to take out the lights with out messing with the bumper you will have to take off all the little lense clips around the head light to split it in two before removal then unclip the indicator that is just an anticlockwise turn and it will pop out then it will come out nicely

reverse order for the reinstall, and for the passenger side exacly the same - the air box i recently removed both of mine to install a set of DRL lights