These are official Mercedes engineering tools (not diagnostics for service advisors). They allow offline coding and flashing. A is available for ~$150/year. No patcher needed.
Once you have secured a verified patcher compatible with your specific Xentry version (e.g., 2023, 2024, or 2025 releases), follow these general installation steps: xentry patcher download verified
This tool automatically searches for and downloads the latest official release. B2B Connect Account: or 2025 releases)