Hello, I am about to sign an order of the 987. I will definitely order the car with navigation. However, without a telephone and without Sport Chrono. I am now considering whether I should order a multifunction steering wheel. My question now, which functions do I control, with my equipment, about the steering wheel??? Furthermore, the demonstration car had no Navi. My salesman could not really report enough about the system. In the brochure and on the web is also not available ts about you functionality. Does any of you have a tip where I can get further information???? Thank you for the answers