If VAGCOM_HWType.exe shows the bootloader is enabled, you can reflash without additional hardware.
The community discovered that Ross-Tech had begun using a technique called The ATMEGA162 would write a specific value (e.g., 0xDEAD) to a hidden EEPROM location. If the VCDS software read that location and found it non-standard, it would disable advanced functions. vcds atmega162 reflash 2021
Remove the screws (often hidden under the sticker) to access the PCB. If VAGCOM_HWType
As of 2021, the latest VCDS software versions and firmware updates are available from the official website. Make sure to check for updates regularly to ensure you have the latest features and bug fixes. Additionally, be aware of any changes to the VCDS interface hardware or software that may affect the reflashing process. vcds atmega162 reflash 2021