Hello I hope I am right here with my question. I had bought a golf with sports exhaust, the seller also handed me an ABE to the exhaust of the exhaust is from ATU . Now I drive the car already a while, now the police hold me to I am asked if I have an ABE to the exhaust, the ABE I had then also handed over. Then I am asked where the number stands on the exhaust there must be a No. punched in or impressed the police can not find a No. the exhaust is z u According to that is not normal. the only thing I could find are the characters of ATU which are imprinted on the end tube. So now I should put that off otherwise there is the next time a defect card. I just stand a bit at a loss there what I should do now ?