We just got our S last week. Yes I know it is small, but we live in NYC and we need backup sensors.

It is a non-nav S. Any suggestion for an aftermarket system?

 

Google 'MINI cooper aftermarket backup sensor' and you'll find this:
http://www.andysautosport.com/back-u...ni_cooper.html
Hope you can make it work. Limited rear visibility by virtue of the cabrio layout, the BU system is a valuable asset as I'm sure it will be for you.

BTW, spend some time checking out the Vendor Directory. You will find a gold mine of possibilities there. Some of them I have saved into my MINI favorites folder. One you won't find there that everybody should have available is http://soopercooperinfo.com/ It has thousands of links to everything MINI you can think of.

 

There must be a bluetooth setup that is out there, i can't find one

 

Must have option in NYC not only for parking, but for Stupid persons walking behind your car while u are trying to back in

 

You won't. The signal is electrical and hard wired to a beeper not RF transmitted.
Here's another link that may be of help.
http://www.realoem.com/bmw/partgrp.d...id=52684&hg=66

 

I saw one for the countryman the other day on EBAY. It's a rear view mirror replacement with a built in monitor for a camera that goes in the back of the car. It was a complete kit.