The "keygen" element of the keyword specifically targets the Datacard. Historically, Mercedes charged subscription fees for access to these databases. To view the specific options on a car's datacard (such as the radio code, paint code, or axle ratio), the software requires a valid license key. Without it, the Datacard view is often blank or restricted. If EPC and WIS are the libraries, XENTRY is the librarian that interacts with the car. XENTRY is the modern diagnostic software suite used for Mercedes-Benz vehicles (succeeding the older HHT and DAS systems).
In the intricate world of automotive diagnostics and repair, few brands command as much technical respect—and present as many complex challenges—as Mercedes-Benz. Unlike generic OBD-II diagnostics that offer surface-level error codes, the Mercedes ecosystem requires deep access to proprietary databases and software. This necessity has given rise to a vibrant underground ecosystem of tools and forums.
XENTRY connects to the vehicle via a multiplexer (such as the J2534 pass-thru devices or the proprietary Mercedes C4/C5/C6 units). It reads fault codes, performs SCN coding (Software Calibration Number), and flashes control units.