SONAX HOT CAR WASH AMTS TUNING SHOW 2017. AMTS – Automobile & Tuning Show – is Hungary’s main automotive event which has been created by the collaboration of many famous exhibitions and shows of the country. The season opening festival takes place at the Budapest Fair Center – Hungary’s largest exhibition venue. AMTS has more than 2.000 unique exhibited vehicles of 15 countries on more than 100.000 sq metres of exhibition area. During the three days of the show.