This is true for all the larger chassis (Allroad aka a6 avant with airbags) & the 2.7t A6, but no guarantee.
Just reminding him that this is not like buying a 100K mile old Civic.
You have an exceptionally complicated (by comparison) motor with 2 turbos and a million water/oil/ aux water/ lines and various issues that are never introduced on a normal car. Engine / tranny comes out for any serious work.
There is nothing to guarantee that a month from now, he hears the call of the turbo lady and is now out 90-100% of it's purchase price for turbos & labor.
Mind you, this is the same for any used car (civic could blow it's engine) but the cost ratio is ridiculous by comparison.
This isn't taking into account the problematic torque converter (upgraded in 04) that will most certainly go not too long after chipping.
If you are comfortable doing the work yourself, or have a close friend who will help, by all means. They are exceptionally rewarding cars to own, but you should be prepared to maintain a $50-60K 100k mile old car. A lot different than owning a 100K mile old $12k brand new civic.
:megusta: