Mercedes Xentry ZenZefi Certificate | Offline Diagnostic & Coding Access

The Mercedes ZenZefi Certificate is essential for enabling offline communication between Xentry diagnostic software and modern Mercedes-Benz control modules. Designed for models built from 2021 onward, it enables workshops and technicians to perform dealer-level diagnostics and adaptations without an online account.

This package includes full remote installation and activation, ensuring the certificate is properly integrated with your existing Xentry setup (C4/C5/C6 VCI).

Key Functions

• Secure offline communication with all ECUs (post-2021 vehicles).
• Perform adaptations and calibrations for transmission, brakes, and steering modules.
• Read and clear fault codes accurately.
• Run actuator tests to verify component functionality.
• Access real-time data and system parameters for deep diagnostics.
• Reset ECUs and perform variant coding within offline limits.

Supported Models

• S-Class (W223)
• C-Class (W206)
• GLE / GLS (X167 / W166 Facelift)
• E-Class (W213 Restyling)
• G-Class (W463A)
• EQE, EQS, and 2024–2025 models

? Why is the ZenZefi Certificate Important?

• Essential for 2021 + Mercedes-Benz models
• Offline diagnostic access – no server login needed
• Dealer-level capabilities for adaptations and ECU analysis
• Remote setup included – ready to use after installation

⚠️ Notes

• Certificate valid until March 04, 2026.
• Requires an active Xentry Diagnostic Software installation.
• Does not enable SCN coding or online programming.

? System Requirements

• CPU: Intel / AMD 2.0 GHz or higher
• RAM: 4 GB minimum (8 GB recommended)
• Storage: 10 GB free space
• OS: Windows 10 / Windows 11
• Compatible VCIs: C4 | C5 | C6