Well it has taken Audi 20 months, but out of the blue they have finally delivered the towbar for my S5 Avant - which I wanted and enquired about at day one! Cambridge Audi have the car and are fitting it today and tomorrow. Having had great success using my old S4 Avant for towing on occasions when I needed to move one of my old cars on a trailer, I partly chose the S5 for its high towing capacity - but for the last year and 8 months I have had to rent a truck instead because Audi could not supply (though they have been fitting them on the production line all this time). The cost is a little under £2,000 fitted, which is pretty steep, but you can't fit an aftermarket one (e.g. from Witter) because apparently it will not be compatible with the software! I had a detachable Witter one on my S4 and naively thought I didn't need to wait 4 or 5 months for a special order S5 with Audi towbar from the factory. Supposedly the software does clever things, like not jamming on the brakes when you try to reverse with this vehicle (i.e. trailer) detected by the radar as an object you are about to hit! We'll see, though I don't know when I will next have to use it as I have sold the car I most often had to transport. Still waiting for the next (4th) software update to solve outstanding gremlins. And need to replace all the tyres - worn out after just 11,000 miles. I used to get 25,000 to 30,000 miles from the S4's tyres. Good to hear you are all enjoying yours. I do too, mostly, but in more sober moments realise I would have been better to buy the Volvo alternative.