UPDATE:
Yesterday when he told me that it was the turbo, i asked was he sure, he said, "i guarantee you 100% its the turbo"
He the said because i had just spent a lot of money on the service, he offered me a deal, 10% off the price of the part and 50% off the labour which = 1250euro
I rang another VW dealer this morning, to replace the turbo he quoted me 1100euro. some deal my guy was doing,
I rang a VW specialist up the country, said he has worked on over 50 MK5 GTI and has never replaced a turbo, unless the customer was upgrading or something,
He recommended that i take the car from them and to get a second opinion as to what the problem is,
So then i rang my VW dealer, said i wanted to take my car away and i would be back in a week or two,
He said, oh they have your car up on the lift and they have started work on it and in doing so they have just noticed that one of the two pipes going into the back of the turbo is broke off, he then said, the pipe is broken and some guy had it just glued back on and now its just broke off, he also said he would be very very confident that this is the problem and it is "not" the turbo,
So yesterday he guarantees 100% that its the turbo, and this morning at 10am they had it ripped up to find this broken pipe,
What do you guys think of this now?
Thanks again.