Factory settings

Hello.
I own a DD EXTREME BASE and for some time now I have had the problem that every CAR I drive in a race understeers as soon as I turn the steering wheel more than 45 degrees.
I have tried all the settings but to no avail.
Now I want to reset everything to the factory settings.
How can I reset the Wheel Base DD EXTREME to the factory settings?
Thanks
Comments
Press the tuning menu button once to open the tuning menu, then press it again and hold it until it switches to the default values.