July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
ASCII Character Table
WARNING: This page is about a different car, the 2004 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: ASCII Character Table
Courtesy of GENERAL MOTORS CORP.
Use these numbers (32 through 255) to enter the corresponding symbols for Driver ID