In the test drive, we also adopted the official special software to understand the changes in terms of driving the vehicle, the vehicle manufacturers in the installed sensors, so I can understand the changes in the status of four-wheel drive system via iPad. The new quattro four-wheel drive system is equivalent to the four-wheel drive configuration work is timely, because it can achieve a state of pure precursor, but it can not be switched manually. However, in the driving mode system, when we choose offroad mode, when compared to the state of four-wheel drive, four-wheel drive, but also not 100%, because when the vehicle is at a constant speed, the system does not need to judge or four-wheel drive system will still adjusted for the two-drive state; and after economy mode is selected, the vehicle will have a chance as long as possible or it will switch to a two-drive model, for better economy. In the two-drive state in which the deep pedal, the vehicle will be completed by the two to four-wheel drive switch in 0.2 seconds, if not looking at this system will not know which change. Due to time constraints we did not experience the test drive and off-road vehicles mild turnaround in terms of performance, more or feel it on the paved road. However, the new A4 allroad off-road vehicle is certainly not its main battlefield, but through the higher ground clearance across the non-paved roads and do some mild off-road I think that is enough.