Hello together, I am faced with a mystery with my moose: When driving with an open window, it smells strongly of exhaust gas in the interior (especially on the back seat where the children are sitting, not at all good…). Two different workshops did a diagnosis and both tested the tightness of the exhaust system by flue gas, with the result: “Absolutely dense.” ????? In fact, Krummer/Flextube are only three years old and muffler/main pipe from last year. The cat is still “old” (from the previous owner). The power is OK (I am used to my elk in spite of its 126hp to 1400kg rather sluggishly), but the oil consumption for my feeling is quite high (about 1L on 2000km). In the error memory (Blink-OBD) is nothing. Curious is also that the smell really only occurs when the window is open. The ventilation always smells pleasantly neutral, therefore the topic was not a problem again in winter. Now I really have no idea anymore and would very much like good ideas when troubleshooting / troubleshooting f Here my vehicle data: PS: 126 Engine displacement: 1984 Drive type: Gasoline PollutantCl.: EURO-2 Body shape: Combi Gearbox: Hand shift Color: Green First registration: 1994 Thank you!