Is this a common rail engine with Delphi injectors?

If so, I have done an A3 2009 reg that was miss-fuelled. Ended up with a pump rebuild, all new injectors, removed fuel tank to be cleaned, new filters etc.. The Delphi system does seem to be fragile when miss-fuelled.

An expensive job. Get the customer to ask his insurance company if it will cover misfuel repairs.