As said above, check for oily carbon deposits around the injectors. Check the service history for oil changes and the correct spec has been used. These engines are really hard on the oil, they dump crap into the oil, run hot, and there is only 3.75l of it. If neglected (or the injectors are leaking) they gum up and bye bye turbo. Pretty much impossible to ever clean out and fix. Max 8-10k oil changes are considered by some best on these engines. I'm doing mine every 6k as it's a keeper.
If it's had a turbo relatively recently, I'd walk personally.
If it's had a turbo relatively recently, I'd walk personally.
