Honestly it was the worst experience.
An ESP light came on whilst on his way home, so he brought it back to me. I said I will plug in with my VAGCOM but he just panicked and demanding I give him his money back. He had already filled the V5 in so I have added another 2 owners (changing it back to me). He phoned me the next day and offered me £2500, he said it was more than likely the ABS unit and module and they are at least £500. He had spoken to his friend and that’s what he has had told him.
it was an £11 brake light switch from TPS.