Mercedes X Klasse Diesel DPF Problem

My 2018 Mercedes X Klasse with a diesel engine is giving me some trouble. I've got about 250685 km on it. The warning light related to the DPF is on, and the engine power is noticeably reduced. I also see some smoke when accelerating, and there's a strong exhaust smell. Could this be related to DPF issues? I suspect it might be the exhaust back pressure sensor. Has anyone experienced similar DPF issues?

4 comment(s)

The symptoms you describe do suggest a potential DPF issue. I previously encountered a comparable situation with a different vehicle, a Volvo. Reduced power and smoke are common indicators. Your suspicion regarding the pressure sensor is reasonable. Has the vehicle undergone forced DPF regeneration recently? If not, that could contribute to the exhaust pressure issue. I would also verify the status of your vehicle's emission control system.

Thanks for the quick reply. I haven't had a DPF regeneration done recently. How can I check the status of the emission control system without specialized equipment?

Given the lack of recent DPF regeneration and your limited access to diagnostic tools, I suggest visiting a qualified workshop. While visual inspection might reveal leaks, accurate emission control diagnostics and pressure sensor evaluation require specialized equipment. It is likely the pressure sensor, but a full diagnostic will confirm. Ignoring it may cause additional costly issues.

Thanks for the advice. I took it to the workshop, and you were right. It was the exhaust back pressure sensor. The repair cost 245€, and the reduced power and warning light are now gone. I appreciate the help with this DPF issue.

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