Hi (first post so please be gentle),

I have a Audi A6 2.7TDi from 2005, it has covered 180K miles and it has what seems to be a problem with the exhaust.

The car has a rattly engine on startup, but sounds just like a diesel once it is warm, no smoke coming from the back, though I have had a few puffs of white oily smelling smoke from the exhaust tips before.
The problem is that there is exhaust fumes coming from the driver's side wheel arch, seems to be when idling from cold (after a minute or so) and after a long drive (30+ minutes normal speed).
It doesn't seem to be using much oil (from what i can tell).

I have no clue on what it could be, I could strip the front of the car down to check, but I am wondering if anyone has had or knows what I should be looking for??

Any advice would be a great start though.

Thanks

Bazz