Moin Moin in the round We own a Mercedes T1 309D with motorhome structure. The OM617 is built. A 3 liter 5cylinder with 88hp… I register here in the W123 forum because the same engine was installed in the W123 300D… The engine has run 195000km. I think about changing the injection nozzles… At the cold start it shakes 2-3 times. Then is good. But most of all I think about it because it no longer has the full steam… Previously it ran on a straight level with viieel inrun 110-115k m/h according to Tacho… In the meantime, he doesn’t do more than 90-95km/h on the plain… He just manages to climb the 100km/h… Is it worth changing the injection nozzles after 35 years and 195,000 KM? Can one say about how much power a few old injection nozzles take? Valves I will also adjust in the same course… Would buy outdated injection nozzles for 265€… Have a leak on the injection system… Does that come from the nozzles? . I’m a car-technically really smart but I don’t know about the injection system… Hang up some pictures… Greetings Thomas