CH340G Driver
From DISCO4.COM Knowledge Base
Please find below a mirrored link of the Windows driver for the CH340G USB-Serial adapter which is used in the ~£5 USB-to-OBD2 KKL adapters.
These adapters can be used for Webasto FBH diagnostics.
This version: 3.4 (30th October 2015)
For: Windows 98/Me/2000/XP/Vista/7/8/8.1/10/2003/2008/2012 - 32 bit and 64 bit
Link: https://www.dropbox.com/s/vqh78e7m8b3i6tb/CH341SERv3.4.zip
This file should be unzipped and the "setup" application run from the CH341SER folder.
Please note this will NOT work with USB-OBD adapters which use the FT232 chips. Get drivers for those from http://www.ftdichip.com/Drivers/VCP.htm