The explanation was not as follows: “Yes, the measuring instrument shows too high values” but rather as follows: “Hello, yes, something is wrong somehow, we had to do 2 times new filters on the measuring instrument, there comes somehow totally a lot of water from the exhaust.” I then ask “yes and how were the values” “yes, the CO2 was much too high.” Could it be that a car at this bad tempera can I prevent the water in the exhaust after such a short distance drive? Can it also be that the catalyst does not change properly when there is still water in the exhaust? Then the shop wants me to change the catalyst and medium/muffler again. They are already worse and partly rusty, but somehow not so bad that they have to be changed. They said there were holes in it and they were leaking, but they never saw holes in it when I last looked down on the lift. Atu’s then thought they’d call me back if the real Tüv had looked at me. But didn’t. Does anyone know such a behavior? Whether they’ve done something wrong or something wrong? But most importantly, what can I do against the water in the exhaust? What do you have so He Do you always have to warm the car before, so that the exhaust gas examination did not fail? Who has ever done the exhaust gas examination in “winter”? And what do they mean by “wrong air”? They said something about false air. Are you talking about false air when the engine pulls false air inside, which confuses the regulation, or are you talking about false air when there is a hole in the exhaust, and the measuring device therefore measures false values?