so i ended up getting a new locking unit from renault as they had one in stock for £50, the only one on ebay was second hand and who knows what use that has had?
now everything on the old one worked perfect but a tiny bit of plastic had broken stopping the cog from spinning.
all the unit is, is a motor that turns a cog
so all i paid £50 for was for a tiny bit of plastic as everything on the original one worked perfect.
im tempted to try machine the bit of plastic that broken out of ally so it does not happen again and ive got a backup lock.
also when i took the black plastic back off the inside of the boot lid this fell out, no idea what its for. any got any ideas?