I bought a used 2015 e-tron 2 months ago and I'm happy with everything except the brakes. They are fine for normal driving when you more or less only use the regen braking but the few times I've really needed to brake hard the response is terrible. There is absolutely no bite in the brakes at all. So my question is what is your experience with the brakes? Are they normally relatively soggy or should I consider bringing it in even though it just had been serviced before I bought it?