Up to 14 % fuel saving with new alternators.

[neil]

Interesting read from Drive article about the new Audi TT
I suspect this will filter through to VW

"The 118kW 1.8-litre petrol turbo and 125kW 2.0-litre turbo diesel continue, though with their consumption figures improved by up to 14 per cent thanks partly to a smart alternator that can recharge the car’s battery during braking or coasting."

Full read :
Audi TT V.2.1

[Coaster]

It's already in some VW vehicles. It's known as regenerative braking and is in the Bluemotion range (which is not available in Australia).
Seems like an easy way to save fuel and money

[balkanac]

I wouldnt mind one of those in my R. Its averaging 12-12.5L per 100km!