Most forum members are aware that VW has been offering a refrigerator for the 4 seat Phaetons since 2004. This is a rather large coolbox, you can see photos of it on this thread: Retrofitting a refrigerator to a Phaeton.
VW is now offering a refrigerator for the 5 seat Phaetons as a factory installed accessory. This refrigerator is a bit smaller (interior volume) than the 4 seater model, and takes up considerably less trunk space. It can be retrofitted to any existing 5 seat Phaeton. Here are some photos.
NOTE: This is a 5 seater - it just looks like a 4 seater because of the two colour leather used.
Here are the parts used, in case anyone wants to order the parts for a retrofit.