Help please I have also posted this in the model-specific section.

I am getting a new model Audi A6, with alloy wheel offset of ET39. I recently bought an Audi winter wheel and tyre package for my old model A6, with offset of ET42. I know that the rolling diameter with the old tyres on the winter alloys is 3% out, but I am wondering if the winter-wheel-alloys are useable with the new car with a 3mm difference.

Many thanks for any advice.