First of all im new here, so hii to every1. I've always liked the audi a8's, and now when i can afford one im going to buy one. I've seen this audi a8 3.0 tdi quatro SE fully loaded on a 54 plate. Specs: Automatic, Saloon, Diesel, Metallic Black. KeyLess, 19"Alloys, ABS, Adjustable seats, Adjustable steering column/wheel, Climate Control, Computer, Cruise control, Driver airbag, Electric mirrors, Electric windows, Foglights, Front armrest, Electrically adjustable seats, Head restraints, Leather seats, Lumbar support, Immobiliser, Navigation system, Park distance control, Passenger airbag, Power assisted steering, Rear armrest, Remote locking, Side airbags, Radio/CD Multichanger, Rear headrests, Traction control, Xenons, Air conditioning, Heated seats, Multi function steering wheel, Sports seats. This is what its advertised with Now i want abit of advice, is the engine good? Economical wise?? And overall would you go for a 3.0 tdi or a 4.2 tdi?? This is first time im going to buy a audi, so please tell me what i should look out for when i go to see it, is it worth it? Im going to pay £16k for it, the car has done 125k, full service history mainly motorway miles. Thank you.