From the refined styling to dramatic weight loss to significantly improved drivetrain, Volkswagen has done a major remake of the Touareg SUV. The 2011 Touareg offers three powertrain choices, including Volkswagen’s first-ever worldwide use of a hybrid engine. All three engines — the 3.0L V-6 TSI? supercharged hybrid, 3.0L V-6 TDI? clean diesel and 3.6L…