http://www.thecarexpert.co.uk/car-finance-pcp-explained/
I have never had a car on pcp always hp. But rather confused as to how you would reveive any cash back after handing the car back to the finance company before your contract terminates. I thought a pcp was effectivly leasing the car. I read through this link and cant see anything re cash back at then end or handing back early nor was anything like this mentioned to me by the dealer. As surely the dealership arent going to underestimate the future value as only then could I see having cash back a possibility.
Taken directly from the link you posted.
"The finance company will set this future value quite low, as it is their loss if the value drops below what you owe on the car at the end of the agreement. The idea is that the car should be worth a bit more than what is owed at the end of the agreement."
"If your car is worth more than the GMFV, then any of that extra (called equity) is yours to use as deposit towards your next car. Say you are offered £12,000 for your car, but your GMFV is £10,000. The dealer will pay £10,000 to settle your finance and the remaining £2,000 is yours to put towards your new car. This is the most common way to settle your PCP, and it is why dealers and manufacturers love it."
If you hand back your car early the same process happens. Your car is valued and the amount left owing on the car is taken into consideration.
After 2 years if you still owe £20,000 on your agreement but your car has a market value of £21,000 then you would have £1000 worth of positive equity. You would give them your car back early which will remove the £20,000 you owe and then VW would give you £1000 to use as a full or part deposit against the R.