| Action | What to do | |--------|------------| | | Click Refresh . The dongle should appear as “VCDS‑Kolimer (VID:PID …)” . | | Backup (optional) | Click Read EEPROM → Choose a folder → Save eeprom_backup_YYYYMMDD.bin . | | Load firmware | Click Browse , pick the .hex file. | | Flash | Press Write Firmware . A progress bar will show the upload. Do not unplug the dongle. | | Verify | After flashing, click Verify (or the loader will auto‑verify). A “PASS” means the CRC matches. | | Reset | If you enabled “Auto‑Reset”, the loader will cycle the dongle; otherwise click Reset or unplug‑replug. | | Done | Close the UI. Your dongle is ready for VCDS. |
VCDS, developed by Ross-Tech, is a popular diagnostic tool for Volkswagen Group (VAG) vehicles, including Audi, Seat, Skoda, and Volkswagen. It allows users to diagnose and troubleshoot issues with their vehicles, adjust settings, and perform various coding and adaptation tasks. vcds loader kolimer