Hello dear Mercedes-community, I am actually from the Audi area and have now lost my way to you due to a grief. My father unfortunately died far too early and leaves a cared for w123 which he inherited from his father. Unfortunately, now apart from me no one really wants to burden himself with the car and my father would certainly not have wanted him to leave the family not even a year after his death, which is why I want to take care of now. Now to the car it is a 200 petrol truck with carburettor and retrofitted catalyst BJ 1982. During the lifetime of my father and his father the car was only serviced in the Mercedes-Benz car dealership. Now the TÜV was at the also bravely passed only unfortunately not the AU. According to the test program the car should deliver a CO value of 0.1, but delivers in idle mode proud 4.9 as well as under load 1.9. Now I can fetch it myself only next week, I had hoped because of the good condition The TÜV would be a pure formality. Now my question: the car was now almost a year ago. Before that he was driven only very little there is the hope that a longer exit than the 20km to the TÜV the car again “free to run”. Then again with glowing engine to the TÜV? Maybe again carburetor cleaner fill in and fresh fuel? Does someone possibly have a similar error picture and can give me a good tip, like Lambda probe temperature sensor or similar? Am for each n Tip grateful and best regards