Mercedes ML-Class Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on Mercedes ML-Class diesel vehicles, such as the ML 350 BlueTEC 4-MATIC, is a critical component of the vehicle's exhaust system. It captures fine soot particles from diesel combustion, reducing harmful emissions that contribute to pollution and health risks. Installed after the turbocharger, it features a porous ceramic substrate that traps particulates while allowing gases to pass through.

The DPF functions by filtering exhaust gases to trap soot and solid particles, causing a monitored backpressure. Differential pressure sensors and temperature probes track the accumulation of soot. When soot buildup exceeds certain thresholds, indicated by engine warning codes such as P2463, regeneration processes are triggered to burn off the soot and clean the filter.

DPF regeneration is the process that burns off accumulated soot to maintain filter efficiency. There are two main types:

• Passive regeneration : Occurs naturally at high exhaust temperatures (above 600°C) where a catalytic converter helps burn the soot.
• Active regeneration : Engine control unit injects extra fuel to raise exhaust temperature to 600-650°C to incinerate soot.

This ensures the DPF remains functional and avoids clogging that can reduce engine performance and increase fuel consumption.

Common issues indicating DPF problems include:

• Illuminated engine warning light with error code P2463 indicating a clogged filter.
• High soot levels, sometimes reaching above 50g or 291% fill on sensor readings.
• Abnormal differential pressure readings, sometimes dropping to zero after cleaning.
• Loss of engine power and increased fuel consumption due to backpressure.

Prompt diagnosis and maintenance are essential to prevent damage and performance loss.

The DPF is placed in the exhaust line after the turbocharger, integrated with sensors such as differential pressure sensors. It is generally accessible via the right hose for maintenance or cleaning procedures.

Non-dismantling maintenance methods include:

• Injection of cleaning products such as Xenum DPF Cleaner through the differential pressure sensor hose, followed by forced regeneration at 2000-2500 RPM, effectively reducing soot levels from about 10.55g to near zero.
• Use of affordable DIY solutions like vinegar or chemical cleaners to dissolve soot and ash, combined with driving at sustained speeds to purge residues.
• Forcing regeneration via OBD diagnostics tools to ensure proper cleaning.

These methods help prevent DPF clogging without the risks and costs related to manual dismantling, though professional assistance is recommended for extensive service.

Preventive advice includes:

• Regularly drive on highways or at higher engine speeds to enable passive regeneration.
• Perform regular diagnostics with OBD tools to monitor soot accumulation and backpressure.
• Use low SAPS (sulfated ash, phosphorus, sulfur) engine oils to decrease ash accumulation in the filter.
• Avoid frequent short trips that prevent the engine and exhaust system from reaching optimal temperatures for soot burning.

These precautions help maximize DPF service life, reducing costly repairs or replacements.

Krosfou offers new, high-performance DPFs for Mercedes ML-Class diesel vehicles manufactured in Europe, built with premium stainless steel (INOX 409) and advanced ceramic substrates. These products:

• Meet or exceed OEM specifications and European E24-103R emission standards
• Are TÜV SÜD certified for quality and performance equivalent or superior to original parts
• Come with a 3-year warranty limited to 100,000 km usage
• Benefit from free returns within 30 days if unused and original packaging is intact
• Are supported by direct factory technical support and fast delivery logistics

Choosing Krosfou DPFs ensures reliable pollution reduction, compliance with European regulations, and sustainability for your Mercedes ML-Class diesel vehicle.