maybe they were using this book

Just wait for the phone calls. "Have you been mis-sold a VW"

http://www.leighday.co.uk/Illness-and-injury/Defective-products-and-consumer-goods-Defective-pr/Faulty-consumer-products-and-consumer-law-claims/Volkswagen-recall

VAG have been lying for years, well their car's trip computers have at least. Most cars over state their fuel consumption but both VAG cars I've experienced recently were more than just optimistic. A6 2.0TDi - computer says 48mpg, worked out at the pump it is actually 36mpg. Passat slowmotion, computer said 58mpg, actual was 42!!

Current company car - Prius Plus (don't laugh too much!!), computer says 56, actual is 52 - much more realistic