Hi Gazza82,
My 156 is a 52 plate 2.0 JTS Lusso.
When driving you can't smell the fumes but get the smell when the engine is first started and when stationary (at traffic lights etc). It does seem to be using a fair bit of petrol though...
I'm not at all mechanically minded so hope this info helps you to help me!!!
Cheers,
Chaddie72