HOT looks and a mild engine workover turn the Audi A4 S Line Avant into an aggressive-looking, compact prestige wagon for less than you’d spend if you went outside the factory to achieve similar results. If almost $75,000 seems a lot to spend on a smallish wagon, Audi would tell you that the increasingly respected badge, the constant four-wheel drive and the impeccable build quality are grounds enough to compare it with Mercedes-Benz C-class and BMW 3 Series wagons. The S Line might not be a rubber-shredder like the massively more expensive V8-powered S4, but it’s quite fast nonetheless. If you want to combine aggressive style with a degree of wagon practicality, and money is no object, the S Line Avant might just do it for you.