Going away for the first time this year in a few days.This morning I struggled to open the door of the caravan.I was frightened of breaking the key. After a few minutes I did manage to open it but it is sticking quite badly.It won't work properly.Discovered instructions to repair kindly put on by Parksy.' ...remove red and green screw covers and cover with HARTAL writen on it, remove the 4 screws , then you will need to turn the handle assy upside down (on a worktop or bench is best) then remove the circlip and double spring clip , the handle now comes out of the locating apperture , simply file or sand the hole to make biger then reverse the removal procedure , a smear of petroleum jelly wont go a miss either...'If we try this and it doesn't work has it invalidated the warranty? Also is it quite easy to do? Our van(Swift Challenger 480 ) is 2 years old so I am not sure if it is covered by the warranty or not.The dealer is over half an hour away and he won't be able to fix it before we go. Is it easy to sort out?I will be grateful for any advice as I don't want to ruin the lock and leave the van unlocked. Thanks.