Mercedes GLC-Class Diesel Particulate Filter DPF (2015-2022)

The Diesel Particulate Filter (DPF) in Mercedes GLC-Class vehicles, mainly diesel but also direct injection petrol engines, is a post-exhaust treatment component that traps harmful particles such as soot, hydrocarbons, and sulfates from combustion emissions to reduce pollution. It is positioned after the catalytic converter and is made of ceramic material for diesel engines, requiring regular regeneration to burn off accumulated soot.

The DPF operates by trapping particulates at low temperatures, especially during city driving or idle. Regeneration is the process of burning these trapped soot particles to clean the filter:

• Passive Regeneration: Occurs naturally at 550-600°C during steady driving on highways; easier on petrol engines due to hotter exhaust gases. Diesel systems use additives to lower this temperature to around 450°C.
• Active Regeneration: When passive regeneration is insufficient, the vehicle’s ECU injects extra fuel into the exhaust to raise the temperature and burn the soot.

Regular driving for 24-26 minutes at 60-80 km/h helps optimize regeneration and remove ash deposits.

Common symptoms of DPF issues include:

• Power loss and visible smoke during acceleration, especially on diesel GLC 250d models from 2020 onwards due to clogging.
• Warning light activation and vehicle going into limp mode indicating regeneration failure or excessive soot build-up.
• Increased fuel consumption and reduced engine performance, often linked to frequent short trips or city driving preventing proper regeneration.

These signs typically point to an accumulation of soot in the DPF requiring attention.

Typical replacement details are:

• DPF part cost averages around £543 including VAT.
• Labour time is generally about 2 hours and 3 minutes for most models, with quicker replacements (about 1 hour 20 minutes) for specific models like the GLC 300e 4Matic.
• Total replacement cost including parts and labour ranges approximately between £707 and £919 including VAT.

The procedure involves removing the exhaust line, fitting the new DPF, and possibly recalibrating the engine control unit. Professional manuals and step-by-step videos are available for guidance.

To keep your DPF in good condition and prevent clogging:

• Avoid frequent short trips and city driving that do not allow full regeneration.
• Regularly drive at motorway speeds to facilitate passive regeneration at high exhaust temperatures.
• Use diagnostic OBD scanners to monitor DPF pressure and soot levels.
• Consider periodic engine decoking (decalcification) to reduce ash build-up inside the engine and exhaust.

The DPF typically lasts 100,000 to 200,000 km depending on driving habits and vehicle use.

Krosfou manufactures premium-quality Diesel Particulate Filters and catalytic converters designed for optimal performance in Mercedes-Benz vehicles, including the GLC class:

• Constructed from high-grade INOX 409 stainless steel for durability and corrosion resistance.
• Equipped with advanced ceramic monoliths coated with rare metals for superior filtration and longevity.
• Certified by TÜV SÜD, ensuring technical characteristics equal or superior to original parts and compliance with European regulations.
• 3-year warranty covering usage up to 100,000 km.
• Manufactured in Europe with leading-edge technology and continuous quality improvement.

These products often enhance horsepower slightly while reducing exhaust emissions effectively.

Krosfou offers direct factory sales of new, high-performance DPFs and catalytic converters suitable for most European vehicle models including Mercedes GLC-Class:

• Orders placed before noon are shipped the same day with free standard UK delivery available within 3 to 8 working days.
• Express delivery options (24-48h) with established carriers like UPS and DHL.
• Technical support including installation manuals and pre- and post-sale assistance provided via email.
• Special discounts, loyalty points, and recycling buy-back services for used parts are available for professional customers.

Contact the supplier or visit their official website for detailed catalogues, compatibility checks by VIN, and seamless purchase experience.

Incomplete DPF regeneration can cause soot buildup and trigger fault codes, leading to loss of power and warning lights. You can attempt forced regeneration by:

• Driving continuously at a steady speed of around 60-80 km/h for 24-26 minutes to reach necessary exhaust temperatures.
• Using diagnostic tools that communicate with the vehicle’s ECU to activate regeneration cycles manually (professional tools recommended).
• Monitoring sensors such as the exhaust pressure sensor for irregularities indicating filter clogging.

Forcing regeneration without proper equipment or conditions can be unsafe, so professional servicing is advised if problems persist.

Regular servicing that includes checking the DPF function helps maintain safe and efficient operation of your Mercedes GLC diesel engine.