Now I don't know how good it is but VAG-Tacho is supposed to read the Secret Key Code (SKC) on older VAG vehicles. This would be very useful as it would supposedly save a trip to the dealer. It appears you can change the mileage that VCDS can't do, though I don't agree with this function.
I haven't used vag-tacho, but another similar product called codecard many times over ther years. Immo one is pretty easy to deciphera code from normally.
I have used the odometer reset function in the past when replacing clusters with good used ones. I usually reset the cluster to zero miles and then use vag-com to code the cluster to the actual mileage of the car. Once reset to zero the mileage lockout is reset for 100km as is a new cluster.
I don't know about vag-tacho, but codecard software will also read and save the dash eeprom and it can be written to the donor cluster which fools the car into thinking it is the cluster it had. Immo and mileage and coding stays the same.
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