Hello, my old VAG-COM 3.11 in conjunction with a cheap adapter doesn’t work any more like my 4f. With its predecessor 4b gnig that’s still perfect. It will probably be because the 4f in contrast to the 4b has a CAN bus. Which diagnostic soft and hardware is in your opinion most useful for the hobby screwdriver, to read out a mistake, to solve the parking brake or to switch off the doofen belt alarm. I thought of this here: http://store.ro ss-tech.com/shop/VCuCAN.html Unfortunately, the 4f is not in the list. I’m open for any idea! Thanks in advance! C@rsten