That person is right , I had to use 45 degree surgical forceps , but you could use right angle long nose pliers , fiddly , but possible , I have done it... I have xenon discharge headlamp units if that makes a difference..on a Mark 2 2006 .
Citroen tell you you need to remove headlamp unit , but its not true , just a bit of perseverence needed..FH
Fred-H
March 2010