After a lot of emails and phone calls and a meeting with VW UK I have got s far as I can without freedom of information requests and going the legal route to get any more information.
This is information on Mk5 golfs as this was what I was asking about.
It seams upto the end of 2017 it wasn't so hard to get VW to sort warranty claims as they had a scheme all you needed was a decent VW dealer to do a bit of leg work. This scheme ended at the end of 2017 and now made it a lot harder to claim against your warranty this in turn with a lot of dealers not playing ball has made it near impossible to get VW to honor the warranty without going the legal route and also having a whole load of proof to do this, basically day one before you do anything you would of had to take photos and start a log of everything that is said and done, but who does this from day one as you have a 12 year warranty right??? VW seam to bank on this knowing now if they turn you down at all you wont have the money, time or proof to take things further with them.
VW will only cover the rust/corrosion if it is a completely from the factory un changed part, ok that's easy or is it well not exactly you also have to prove that you have owned the car before this problem started now this can be a decision that the dealer makes there is no rust to time scale be warned also it has to be corrosion that has started from the inside of the part. it has to also be to a certain point in the corrosion if you take it in and you have a hole all the way through why did you not take it in sooner you need to take it in as early as possible as soon as you see it.
Now this is all well and good but and this is a big BUT... the 12year warranty it only covers the smooth parts ie the bonnet middle of the wing where it is smooth if its on a fold its a no no. WHAT REALLY!!!!!
Unfortunately yes its all in how VW word the warranty they have 4 different flipping types of rust and 1 of them is covered that's it and this is how VW get around doing the wings unless you have a full copy of the MK5 VW Warranty terms and conditions and have a knack for legal bull lingo this is almost impossible to know and even if you ring up and ask VW for this proof they will tell you to go to the dealer and ask them and when you go to the dealer they can't get it for you.
Some of all this if you have a very nice dealer who argues for you will be ok and they will get past these for you, but the dealer has to be prepared to spend time arguing for you and pay about 30% of the bill sometimes more. AND NO NO NO NO you can't say you will pay the 30% NO NO NO if any dealer gets caught doing that they will loose the right to sell for VW....... DAMN
So to summarize what I have found out---
VW your warranty is deliberately summarized in the handbooks to make it sound like it is a good deal you deliberately make it near enough impossible to get a copy of the real terms and conditions so people buying from you don't understand really what you mean unless they spend a week reading and working out the warranty and that's 1 part to the contract. When people look into this further all you do is pass the buck hoping it will scare people off and it works. Also you yourself have not given all your own workers the real information so they themselves give wrong and misleading information to people this in turn causes mass confusion and makes it even harder to find real information. You bank on people not having time or money to take this further and also enough proof to take legal action. You VW are an ASS...
If I had lots of money and time I would take this further but VW know not many people will have the money to do this and if they do they probably wont have a VW LEL...
A few tips that might help you with a claim.
1) Ring around different dealers and find one that openly says to you that it is a 12year warranty and go there.
2) Talk to the dealer warranty guy on the phone before you go make sure he is a decent guy and not a c**kwomble this will help.
3) Make sure your car is under 12years old from the date of first purchase/regastry(simple I know but had to put it in).
4) Take photos lots and lots of photos from the second you notice the problem.
5) Keep a paper trail I can not stress this enough email is a legal document now don't forget USE IT MWHAHAHAH.
6) If you have a friend or family who has a new VW take them with you and get them to make it clear they use that dealer (Company's lick the ass of there existing well paying costumers use that).
7) Keep your calm!!!!!! if you don't like what they tell you I know if feels good to tell them to $%^£& $£&£& it up their ass but this will get you nowhere, show integrity and bow out and if you choose to take it further it will help.
If you know anyone that has has the warranty repair done take them with you.
9) Buy a prius.......
I am sorry I don't have better news for you guys I did try my best to get as much information as I could but VW stone wall you and pass the buck wherever possible its extremely tiring trying to get just 1 true answer from them so I feel your pain anyone who has tried to get a warranty job done.