Hopefully someone like Clan (forum member) will be along soon and can give you the info you seek. If not give him a PM and ask him, he's a nice chap.
I've got a petrol V50 so have not seen where the plugs are in the your diesel, maybe you can take a picture so we can see?
Most other deisels are pretty straight forward in that you remove an electrical wire/connection and then unscrew the plug. If you can see them then that is half the battle.
I'll have a look on Vida later.