I bought a 4 year old QP in july with only 67.000 km on the clock. Already after 2 weeks a radiator hose deep down in the engine bay blew. 11 hours work was charged from the garage, it was a very difficult job. Eary october one more blew , also located deep down in the engine bay but the mechanic told me that at least now there where no more hoses to replace in this area of the motor bay. Yesterday another hose blew, was not able to locate the hose but it seems it´s in the upper part of the engine bay and therefor will be easier to replace. So now is my question: It seems that the only thing I can do is to get ALL hoses replaced. What material are these hoses made of? I am sure this does´t happen to 4 year od Mercs and BMWs. I have read several treads about this problem and I ask myself: Have all other owners the same problem. Must you change all hoses every 4 years? I love the car, it looks fine and drives fine but this is just not acceptable for a luxury car in the 21st century.