Hello All.

Last Monday I paid the first deposit on a new Cayenne S which should be ready in September apparently. In four months (ish) I will have to pay the remainder of the deposit and confirm the options. I apologise if I'm displaying poor forum etiquette but I have a couple of questions that I could use some help with as this is my first time being a Porsche owner.

These are some of the options I've specified:

21" Turbo II wheel with Wheel Arch Extension
PTV Plus
Air suspension including PASM
Servotronic power steering
Porsche Entry & Drive

My questions are:
1. Are the 21" wheels particularly prone to buckling/warping? My brother had 19" Audi wheels which needed to be replaced after 4 months.
2. Does PTV Plus offer a noticeable difference to handling?
3. Does the Servotronic steering feel distinctly unnatural?
4. Has the Entry & Drive system suffered from any electrical gremlins?

5. Is there any issue that I should be aware of and is there any optional equipment that must/must not be included?

Apologies for such a long winded post and thank you in advance for any guidance you could provide.