Hello, with the Smart (Smart smart fortwo coupe pure micro hybrid drive, 999 cc / 61 hp) which I want to buy, the yellow engine control lights up and starts to flash after a certain time. The dealer says that head gasket is defective. White smoke or stinking exhaust gases are not available. Also no cooling water drops in the oil. Oil is very good. Also no smell in the cooling water. Further there is the uncertainty whether the cylinder treads have a damage. Since I want to buy the Smart first, I can of course not say anything what happened with the car before. I am a trained engine builder and would like to direct the Smart. Would be nice if the repair went WITHOUT engine expansion. First and most important question: is the head gasket change possible WITHOUT engine expansion? Thank you!