the headlights NEED to come out to change the motors, so yes bumper off, cant get them out with headlights in situ, as you need ot undo two screws holding them in....ive got this down to a tee no, can get bumper off do my fiddlign and put it all back in under 45 mins! (have to be quick cos i have to aim the lights in the local morrisons underground car park)
also i agree, strange they should both go at the same time.....weird one