The front indicator bulb has gone on my 2004 E53 - anyone know if you can DIY replace (& if so how). The car has xenons and for some reasons I've got the idea in my head that its a dealer only job (something to do with the vacuum) - though I could be imaginging this

I cant see any way to get to the indicator bulb holder - other than remoing the headlight unit but don't wanna try this if it could mess up the xenons.
Any help/advice appreciated.
Phil.