Mercedes E Klasse Diesel Power Loss and Smoke

Addressing your query regarding the Mercedes E Klasse, specifically the symptoms of reduced power and smoke upon acceleration, a defective diesel particulate filter (DPF) certainly appears to be a strong possibility. Before considering filter replacement, have you checked the engine control unit for any stored diagnostic trouble codes? Were any sensor faults recorded which could potentially influence DPF performance and regeneration cycles? What is the typical driving pattern - predominantly short journeys, or longer, sustained runs, as this can greatly affect DPF functionality?

I did pull the codes. There was a code related to DPF pressure sensor. Is it possible a faulty sensor would cause these symptoms, or is it more likely the DPF is genuinely clogged and needs replacement? Is DPF cleaning a more realistic option than I thought?

Confirming a DPF pressure sensor fault supports the initial assessment. While sensor malfunction can indeed trigger the observed symptoms, it frequently indicates an underlying issue within the DPF itself. The sensor may be reporting accurately on an already compromised filter. Given the vehicle's mileage and the presence of smoke, signifying particulate overload, scheduling a thorough diagnostic evaluation at a reputable workshop is advisable. They can accurately assess the DPF's condition, the exhaust system and ascertain whether cleaning or complete filter replacement is the optimal solution to restore fuel efficiency.

Appreciate the advice. I took it to a workshop, as you suggested. Turns out the DPF was toast, as expected. The sensor was fine, just reporting the inevitable. I ended up going for a filter replacement; cost me around 1550€. It runs like a dream now.