hello , I was for preliminary inspection at Boschdienst because of AU , the Lamber values were in order respectively perfect . But unfortunately the CO values were too high .. the examiner said in stand should be the value at 0.2 and at run 0.3 .. only the problem is mine was in stand 0.5 and in run 0.8 . That meant that could be the CAT , which only makes me stucco that he has tested the value under 4 cylinders 4stroke engine and I have a 2.3 NG 5 cylinder Cabriolet type 89 . Now my question I have j etzt eine neue KAT kaufen , ist das jetzt mit dem KAT kommt so kommt / muss er jetzt so gerne durch ???? Or is there any trick as I can try it out. Now my second question: What should I build a cold running controller or minicoat ?? to lower the controls. and should I do this before the TÜV or after the TÜV ??? love greetings and thank you nicely in advance =) P.S: Does anyone have a care that is still in good standing to sell ??