My 2013 Cayenne diesel with auto dimming mirrors do not have the distortion in the drivers mirror, so it may have been a bad manufacture batch as noted above. As long as the service folks notice and agree with you, they should be willing to replace the mirror under warranty as the distortion could be a safety issue in some driving conditions, at least that is what I'd claim and have them note it on the service form.

 

I will try also but I have done some much hi way driving both day and night I would have thought I would have noticed.
Upon second thought objects stay in the mirrors for such a short time, I may never get the chance to test

 

I just tried the same test sitting in my Durango and no waviness. It has a 9" wide mirror.

 

On your 2013 Cayenne, how did you remove the stock side mirror?

 

I used the method illustrated here:

http://www.toolworks.com/bilofsky/boxster/mirrors.html

This one was published in 1998, but doesn't look like things have changed much. Basically tilt the mirror as far down and towards the vehicle as it will go. I worked near the mounting point to get it to release which is more top than side. If needed, work a trim tool between the mirror back and the mount to get it to release. However, both of mine came off with steady finger pressure.

 

Then my observation won't be of any use to you in that regard.

 

HA!