So what's people's opinions of these newer engines! I'm battling with Audi about my 2.0 TDi 170, saying fuel efficiency is rubbish. There's a few options open to me, but they all don't look good. Currently there's a deals on the new A6 so I could move from my Dynamik into a FWD 2.0 TDi 177 A6 S-line. Is it worth trying to get the 177 version and hope the engine is better?