I have now tried and observed a lot. I have observed the following with my 170hp gasoline automatic (MY 07, 44000km). The engine runs generally nicely round and evenly. Stand-up gas also. No change if climate on or off. Also cruise control has no influence. NUN to the actual. I have the impression if I give only minimal gas the impression that the engine is jerking and stockerich(?) runs. Especially if I drive for example so 120 then go off the gas and so at approx. 100km give only minimal gas again d the gas so stop. I mean that I have this bumpy engine run even when I have gone off the gas. Similar to a carburetor motor which is too lean. But the engine willingly picks up gas and accelerates cleanly. Even with stronger gas position you don’t notice anything. Only if you give gas very gently and leave it in “sleep position” so to speak. I then opened the air filter box and knocked out the filter. The air filter box was quite different. The LMM looked clean. I am not exactly a professional when it comes to this engine and also petrol injections. I would be interested in which factors to intervene in the control system or if this is possibly simple and simply normal for the engine. What about the valve play? That can also be such effect. How am I supposed to narrow down the problem if it should be one at all?