This is the modern Mercedes Benz logo as your 3G/EDGE Network icon. The reason for adding EDGE was for the T-Mobile users who wish to have this as well. This is a working version for iOS 4.0 and above. *Note* This is the 3G/EDGE Icon only, no addition theming from the screenshot is included. *Note*
Simply install through Cydia, then open Winterboard and select the theme "Mercedes 3G". Drag it to the top of the list, and respring.