I've just traded my S5 Cab in for a TTS and now have a Mods4cars STLFAI2 smart top available . These retail for 269 euros (not including posting) on the Mod4cars website. You can pick them up for £299 on eBay.
You can remotely open and close the roof from the fob using 3 clicks. you also get one touch operation on the interior button, it's so much more intuitive than holding your finger down for 15 seconds! You can also configure it to leave windows up, or have them down when the roof is lowered. I've had it for around 18 months, and it has worked flawlessly.
Took me 10 minutes to fit - VERY EASY!
The unit comes in excellent condition and instructions for fitting are here:
MODS4CARS - YOUR SPECIALIST IN SmartTOP HIGH-END ELECTRONICS FOR CONVERTIBLE TOP AND REMOTE CONTROLS
I'm after £150 including P&P. I have advertised elsewhere.
I can accept paypal (gift) or bank transfer.
UK only please!
Any questions, please feel free to ask.