Resolving XENTRY Fault 3.91: A Comprehensive Guide

Xentry Fault 3.91 can be a frustrating obstacle for Mercedes-Benz diagnosticians. This guide provides a detailed walkthrough of the installation process for XENTRY Passthru and outlines a proven solution for addressing the 3.91 error. We’ll cover system requirements, key installation steps, and specific fixes to ensure a smooth diagnostic experience.

Preparing Your System for XENTRY Passthru

Before installing XENTRY Passthru, ensure your system meets the following prerequisites:

• Operating System: Windows 7 SP1 (x86 or x64), with x64 recommended. Important Note: Certain Windows updates released after 2018, specifically KB4093118 (HP), KB4103718 and the June 2018 quarterly rollup (Dell), can cause driver conflicts, particularly on Windows 7. These conflicts may manifest as display adapter issues, network card problems, or general system instability.
• User Account: Log in as an administrator with User Account Control (UAC) disabled.
• Internet Connection: Disconnect from the internet during the installation process.

XENTRY Passthru Installation Steps

Follow these steps to install XENTRY Passthru:

1. Run Setup: Launch the setup.exe file from the XENTRY XDOS or XENTRY Passthru ISO.

2. Copy Missing Pictures: Copy the missing XENTRY pictures to the appropriate directory:

   • 32-bit (x86): C:Program FilesMercedes-Benz
   • 64-bit (x64): C:Program Files (x86)Mercedes-Benz

3. Install Key Loader: Install an “old keys loader” for ConfigAssist or StartKeyCenter. This allows the use of keys generated by older XENTRY/DAS keygens. Choose the version corresponding to your operating system (x86 or x64) and merge the .reg file into the registry. This ensures compatibility with older license keys.

4. Enter License Key: Run ConfigAssist or StartKeyCenter and enter your XENTRY license key.

5. Prevent Key Deletion (X4711 Method): To prevent XENTRY from deleting your key and encountering the “no access authorization code” error, especially during online operations, utilize the X4711 method:

   • Copy C:ProgramDataLicDirlic_key_2.dat to your desktop.
   • Rename it to lic_key_2.x4711.
   • Set the lic_key_2.x4711 file to Read Only.
   • Move lic_key_2.x4711 back to C:ProgramDataLicDir.
   • Ensure the original lic_key_2.dat file is NOT Read Only. This method is crucial for maintaining online coding functionality and preventing authorization errors.

Addressing XENTRY Fault 3.91

To fix XENTRY Fault 3.91:

1. Install 3.91 Error Fix: Replace the existing db2mv.gmf file (or rename it) in the following directory with the corrected version:
   • 32-bit (x86): C:Program FilesMercedes-BenzXENTRYKontexteAllgemeine_AblaeufePublic_Functions
   • 64-bit (x64): C:Program Files (x86)Mercedes-BenzXENTRYKontexteAllgemeine_AblaeufePublic_Functions This specific step directly addresses the 3.91 fault by replacing a problematic file.

Conclusion

By following these steps, you can successfully install Xentry Passthru and resolve the common XENTRY Fault 3.91. Proper system preparation and meticulous execution of the installation process are key to ensuring a functional diagnostic setup. Addressing the 3.91 error specifically requires replacing the db2mv.gmf file as outlined above. This allows for uninterrupted diagnostic sessions and accurate vehicle analysis. Remember to consult official Mercedes-Benz documentation for the most up-to-date information and procedures.