ENVIOclev Posted 15 hours ago Share Posted 15 hours ago How frequently does the DPF in your OM642 regenerate? Mine appears to occur quite regularly.I have not verified, but I would estimate approximately every 300 miles. I have not been engaging in long-distance activities recently, which will not be beneficial. Does anyone know the average mileage between regenerations? Does anyone have an explanation for why it may regenerate excessively? The DPF fill levels are within typical parameters, and there are no defects detected on the ICarsoft. I have heard that intake air leaks can lead to excessive regenerations. Is there anything else? I am not really concerned, as she is already driving proficiently without any concerns; yet, it would be reassuring to have confirmation. Thank you in advance. Quote Link to comment Share on other sites More sharing options...
colinallcars Posted 15 hours ago Share Posted 15 hours ago In 18 years and 181,000 miles, I have never observed our vehicle performing a regeneration. Original DPF, albeit temperature and pressure sensors have been updated over the years. Quote Link to comment Share on other sites More sharing options...
ENVIOclev Posted 15 hours ago Author Share Posted 15 hours ago It must have performed this action numerous times across 181,000 miles; otherwise, it would be completely obstructed. The sole indication that my engine is regenerating is a somewhat elevated idle speed (100 to 150 rpm) and a subtly rougher exhaust sound during vigorous acceleration. May be easily overlooked. Quote Link to comment Share on other sites More sharing options...
trikey Posted 15 hours ago Share Posted 15 hours ago My ISTR would regenerate approximately every third or fourth tank full, translating to a distance of between 1,500 and 2,000 miles; but, as I sold the car 11 years ago, my memory may be inaccurate. Additionally, my everyday journey occurred on rapid A- and B-roads, which may have facilitated more frequent regenerative braking without my awareness. Quote Link to comment Share on other sites More sharing options...
Flexfer Posted 15 hours ago Share Posted 15 hours ago Direct excerpt from the E Class handbook: "Vehicles equipped with a diesel particulate filter: if the vehicle is predominantly operated over short distances, malfunctions may arise during the automatic regeneration of the diesel particulate filter." This may result in fuel accumulation in the engine oil, potentially leading to engine failure. Consequently, if you regularly drive small distances, you ought to undertake a 20-minute journey on a freeway or rural road at least every 500 kilometres. It is essential to sustain a continuous speed, avoiding stop-and-go driving in urban areas; thus, the preference for motorways or rural roads. Quote Link to comment Share on other sites More sharing options...
ENVIOclev Posted 15 hours ago Author Share Posted 15 hours ago Indeed, I perform that action, and regeneration is successfully completed; but, it appears to occur more frequently than necessary. Quote Link to comment Share on other sites More sharing options...
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