When the wife had her Doblo MoT'd last year she was told that the rear indicator bulbs would need replacing as they had faded in the sun. I looked for advice on this site as well as doing a "google" and all I could see was the warning about loosing the internal nut!
Well the MoT is due next month and she's away with her mates in Cyprus for the week,so I decided it was now or never!
Must say I was panicking for no good reason,the first one was harder to replace than remove,but once I had calmed down and had a cuppa,I found that I needed to pull the unit into place by tightening the internal nut first before replacing the two external bolts.The second one was a piece of cake taking less than half the time of the first,so my advice to anyone contemplating undertaking this task is -Do Not Panic! - Ignore the scaremongers,it really is NOT that difficult!