Off the back of a recent thread where we got onto the topic of wheel and tyre size, and the changing of same to make things more comfortable I decided to do some digging into how the speedometer might be corrected if larger tyres are fitted.   Fundamentally, this involves changing what VAG refer to as the K-number. This is a parameter that tells the cluster how to translate the signal from the wheel speed sensors into the correct km value for display on the speedometer and odometer. On older c