The E63 S is a very fast car, but the Audi might be invincible.
The Mercedes E63 S Wagon is by far the coolest family hauler that you can buy in the United States. The AMG wagon is powered by a 5.4-liter twin turbocharged V8 with 577 hp and 590 lb-ft of torque. The S variant comes with a seven-speed automatic that drives all four wheels. 0-60 mph takes just 3.4 seconds (according to Car and Driver) and the quarter mile takes just 11.7 seconds. Clearly no wagon in the US can touch it. However, we don't get the Audi RS6 in our country.
The RS6 may sound like it is at a disadvantage with "just" 552 hp and 516 ft-lb of torque. However, you might not want to underestimate the Audi, because the company has a propensity to underrate its hp figures. This is one of the coolest wagon drag races ever. Place your bets!