I did mine yesterday with some warm white SMD festoons I had in a drawer that were too bright for the number plates.
I had a lot of trouble removing the lamps from the headlining as nothing would engage with the metal tab-spring, and the tab-spring bent out.
I removed and reshaped it, but now I can't get the lamps to be a tight fit in the roof, they are loose and rattly. It is as though the spring is too short now.
Google gives examples of others saying this across all models. Any tips for rectification?
New ones are £8 ish,
Might have to make a new spring out of plastic or something or just dab some hot melt glue on it.
http://www.ebay.co.uk/itm/370443700311