I test drove a 2016 A4 at Big Motoring World on Sunday. When I asked about both the SD Card and second key, I was told that if they had them they were kept at their collection centre but they made no guarantees that they were present and they had no mechanism in place to check. If I bought the car, the first time I would know if it had both keys and sat nav card would have been when I collected it. I wasn't prepared to take a £15k gamble and bought from a Main Dealer on Monday. £900 pounds more, but with all the Audi used car benefits - Warranty, road side assistance etc and both keys and SD Card.