Does anyone know the correct procedure for resetting the dual zone climate control system on a C5 A6 Allroad? Mine is cooling the air fine (after a regas) but the driver's side is failing to mix the air correctly i.e. it's always warmer than the passenger side despite being set to the same temp.

When I tinker with the temps it sometimes fools the driver's side into more cooling but I think the calibration is out or something.

I want to try a reset to see if that corrects things before messing around with dampers and motors etc. but not sure exactly how to do it via VAG.com.