what changes were made to cayenne diesel from 2013 to 2014 models?

 

Between the MYs, nothing that I'm aware of directly. The late 13s (11/2012 and later) builds had some minor tweaks like PCM changes and color tweaks that were changed on all models. In mid-14 the plain diesel was replaced with the Platinum edition which is just a package of options as well as a custom color and set of wheels.

 

Only differences I noticed were a couple of controls that were moved around on the center stack, and I think the interior overhead lights are now LED instead of incandescent, they are much brighter and whiter.

 

The central lock button at the center console is deleted on 14s, you need to use the ones on the door handles.