The AUDI A6 (2004-09) 4DR SALOON 2.7 V6 TDI 180 SE MTRON AUTO is a large executive saloon, offering more comfort and space than a family hatchback. In the UK, it competes with the BMW 5 Series and Mercedes-Benz E-Class, with understated styling and a roomy cabin. The 2.7-litre diesel automatic suits motorway journeys, commuting and family travel, delivering relaxed progress and generous passenger space. It best suits buyers seeking a comfortable long-distance car, rather than compact dimensions or minimal running costs; older examples deserve careful checks and maintenance budgeting. Mycarcheck.com checks show 354 look-ups covering 149 VINs, a sample for this model. Recorded cars averaged 146,000 miles and 9,000 miles annually, with nearly five previous keepers; average private-sale value was £1,400. The AUDI A6 2.7 V6 TDI SE is now an affordable used executive saloon, valued for comfort, driving and equipment, and a credible alternative to German rivals.