Santa Fe decays under the hands

Hello community, have here the problem that my Santa Fe, 2.4 Benz., but langasm certainly decays. In particular, that means that the steering wheel dissolves and the clear varnish dissolves. (looks great with a black car with the hand plate size white lacquer islands) The car is year 2002 and the whole thing is. HyundaiGermany apparently normal that their boxes collapse at 5-6 years. I probably bought three times a Hyundai, the first, the last and the only time. With this car and the Hyundai’s service is made a laughing stock. Who already had the same problem, according to an oral statement of a dealer, these problems (lenkrad, clear varnish removal) are known for ages at Hyundai and will remain silent. A layer thickness measurement of the bonnet showed that the hood has already been painted. Lt. statement of the dealer in the first year, but why can he not say despite electronic diary in the system. Even the previous owner cannot remember. (Is there really something being kept secret here??)