Audi TTS purchase advice...

[...]

Hi guys. My friend (no really) is looking to buy a TTS. He's found an approved used one in Oxford he wants to take a look at tomorrow afternoon.
Is there any big problems/expensive failures he needs to look out for? Obviously being approved used it will carry some warranty, but he's asked me if there's anything I know of about these so thought I'd ask on here first.

Should also add he's dead set on an auto.

The car...

https://usedcars.audi.co.uk/usedcar/audi/tts/tts-r...