Hello, I open the thread extra because there are so many different situations and so many different opinions, but would like to ask you a question. Have a Laguna 2 Ph.1 Built 02. 1.8L motor gasoline. Situation: Come from the Westerwald and always have to go to Koblenz to the university. The ride goes rather downhill and back uphill. Ride always so about 100km/h. At the end, if I have reset before, I have so about 9L/100km in the onboard computer. Ride really gently and “brattel” rather there. not big through town, just looking for some parking space. If I drive from village to village, I come quickly over the 10L. In the diagnostic menu or test menu it says: “_ _ _ t”. I remember that what had to do with the injection. Spark plugs and air filters looked still good, (laien opinion) and would rather prevent new ones to be installed, at least now. Climate I have of course out and windows too in the weather. I expect of course no consumption of 5L but have The Mercedes I had before was the 93, 2,2L engine and 150hp, and also came on 9L when driving. (Had only no BC of course) You have suggestions. Greetings