Mercedes B-Class Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on Mercedes B-Class diesel vehicles is a key exhaust system component designed to trap fine soot particles produced by diesel combustion. It is a ceramic filter installed after the catalytic converter to reduce harmful emissions and comply with stringent regulations.

The DPF collects soot particles from the exhaust and periodically burns them off to prevent clogging. It works through two types of regeneration:

• Passive Regeneration: Occurs automatically during high-temperature driving (e.g., highway speeds) at 550-600°C, burning soot into harmless ash.
• Active Regeneration: Initiated by the vehicle's ECU when conditions for passive regeneration aren't met. It injects additional fuel to raise the exhaust temperature and burn accumulated soot.

A pressure differential sensor monitors the filter, measuring the pressure difference before and after the DPF to detect soot buildup.

Signs of DPF issues in Mercedes B-Class diesels include:

• Diagnostic trouble codes like P2463 related to excessive soot loading (over 200% to 291% fill rate)
• Illuminated or flashing DPF or engine warning lights
• Loss of power due to exhaust backpressure
• Failed or impossible regeneration if soot load surpasses around 50g

These symptoms indicate the filter is becoming blocked and requires cleaning or regeneration.

DPF diagnosis involves connecting an OBD scanner to read soot loading and error codes. If soot levels exceed 200%, the DPF is likely clogged. The differential pressure sensor should also be tested and replaced during servicing to avoid false readings or leaks.

• Passive regeneration: Takes place automatically during long highway drives with adequate exhaust temperatures.
• Active or forced regeneration: Can be triggered via an OBD diagnostic tool that commands extra fuel injection to burn off soot when passive regeneration conditions aren’t met.

Maintenance tips include using high-quality diesel fuel and engine oil to minimize soot production and regularly driving the vehicle on longer trips to enable proper regeneration.

Yes, there are specialized DPF cleaning additives designed to be added via the differential pressure sensor or fuel system that help reduce soot buildup without dismantling the unit. For example, products like Xenum DPF Cleaner have proven effective for Mercedes OM651 engines with code P2463 issues after running the engine at certain RPMs (around 2500 rpm) during cleaning.

However, always follow product instructions carefully and avoid allowing cleaning products to reach the sensors or cause damage to the system.

Removing and replacing the DPF on a Mercedes B-Class (e.g., B 220 CDI 2013 model) involves:

• Raising the vehicle to access the exhaust system under the chassis
• Unbolting and carefully removing the DPF after securing the vehicle height
• Cleaning or replacing the filter unit as needed
• Reinstalling a new or refurbished pressure differential sensor and hoses to prevent leaks
• Performing a road test to verify restoration of power and improved fuel economy

Tutorial videos are available for guidance, covering diagnostics, disassembly, sensor replacement, and cleaning procedures specific to Mercedes B-Class models.

The DPF should be replaced when it is irreversibly clogged or damaged, meaning it cannot regenerate properly and soot load exceeds approximately 50 grams without improvement despite cleaning attempts.

• Replacement filters for Mercedes B-Class diesel typically cost around €305, depending on the model and supplier.
• Preventive care by regular long drives, high-quality fuel, and proper sensor maintenance can extend DPF life, delaying costly replacement.

Always consult professional diagnostics or your Mercedes garage for specific advice based on your vehicle’s model year and engine variant.

Krosfou offers brand-new, high-performance DPFs manufactured in Europe with a 3-year warranty and certified quality equal or superior to original parts. These filters are constructed from stainless steel INOX 409 and high-grade ceramic monoliths treated with advanced coatings to ensure durability and optimal emission reduction.

Benefits of choosing genuine Krosfou DPF include:

• Compliance with stringent European regulations and manufacturer specifications
• Direct factory shipping with professional technical support
• Free returns within 30 days for unused products
• Available for most European vehicle models including Mercedes B-Class diesel variants
• Options for PRO account holders with discounts and loyalty programs

For guaranteed authentic parts and reliable performance, purchasing from reputable European manufacturers like Krosfou is strongly recommended.