Inside the wheel well there is a small cover plate with 2 plastic screws which must be turned a quarter turn. The plate then comes out. Pull the plug off the back of the bulb. There is then a plastic collar which must be turned counter clockwise. To install, do the same in reverse.
very carefully
how do you change a headlamp on a Toyota rav 4
2 sliding bars hold headlight in remove and pull headlamp forward and out
You have to remove the front bumper to change the head lamp , i did it one time on my Mazda 6 2003 . Regards Abdullah al brahim from K.S.A
See posting for "How do you change the headlamp bulb in a 2003 Grand Prix?" All these model years are similar in production for the headlamp assembly.
The front bumper facia needs to be removed to access headlamp assemblies.
You can replace the front bearing on 2003 Citroen Relay using air tools.
Standing in front of the bad headlamp, with the hood open, notice the two black tabs sticking up behind the headlamp assembly. These are locks that hold the headlamp assembly in place. Remove the locks by wiggling and pulling straight up. Now the headlamp assembly will drop out the front far enough to twist out the bulb socket to change the bulb. Reverse for installation.
At guess from a Citroen dealer who will order one or try Citroen website www.citroen.co.uk
they are H4
citroen c5 2006 fuel filter location
there is two rods that go through the housing from the top. turn them to unlock and pull up and out then the whole assembly comes out and you can change the bulbs.