Don't listen to all the crap that VAG spout off about no change in fuel economy or torque, and no detrimental effects on the engine components. It's all BS.
Read all the comments from real owners who have had the "fix" applied at the bottom of the following article. There are a ton of comments and the truth is all there in black and white.
http://www.honestjohn.co.uk/news/vo...guans-losing-power-after-ea189-emissions-fix/
There is no legal requirement in the UK to have the "fix" applied, and the government aren't offering any incentives if you get the "fix" applied (or penalies if you don't), so why would you even bother taking the risk? If something goes wrong with the car after the fix is applied, don't expect VAG to
help you out with the cost of any repairs or revert the engine ECU software back to the previous version, because they won't.
If it's not broke then don't fix it.
My car is going in for a service in a few weeks time and I've drawn up an agreement for the dealer to sign confirming that they will not perform any engine ECU updates on my car when they service it. I have a log of the current engine ECU software version so if I find it's been updated when I get the car back then I will take action against them on the basis of the agreement they signed.