My new A3 didn't have the folding mirror option, but I was able to get the passenger mirror dip on reverse VCDS coding carried out, following the advice on this forum. When the mirror selector switch is in the 'left' position, the passenger mirror does indeed dip on reverse. However, when moving forward again, the mirror returns to its normal position and travels a little further each time. After a few times I have to adjust the mirror's position to bring it back to the normal setting. Has anyone else who has carried out this mod encountered this problem, or has any idea what the problem might be?