2.0 TDI differences

[Deaks]

Hi all,

Stumbled across this forum as thinking of getting a B6 TDI.

Very informative site with some excellent info and tips.

When reading the parkers guide they mention two types of engine on the 2.0 TDI. One being better than the other ( both 140BHP units)
apparently the later - early 2008 is the better
IS there any way to tell the difference visually ( i think the oil cap could be in different places ??) or an engine code ?

Any general advice on picking one up privately ?

Many thanks

Deaks