2020 Mercedes-Benz CLS-Class Air Filter in Sudbury, MA

The engine air filter sits in a sealed airbox within the engine bay, ahead of the 3.0L turbocharged inline-6 intake tract.

This design protects the intake system while ensuring the engine gets a clean, measured airflow. On the 2020 Mercedes-Benz CLS-Class, the airbox cover is secured with clips or screws and uses a gasket to keep debris out. If you’re unsure about access or sealing, we can verify fitment and document the service at Mercedes-Benz of Sudbury. You can schedule service online anytime.

• Airbox cover typically uses clips/screws for access
• Check the perimeter seal for cracks or gaps
• Inspect for leaves/sand before installing the new filter

The cabin air filter is typically behind the glove box in the HVAC housing on the 2020 Mercedes-Benz CLS-Class.

Access commonly involves removing the glove box liner or a side access panel, then sliding out the filter cassette. This filter traps dust, pollen, and road particulates that are common in Greater Boston commuting. If you want OE fitment and correct airflow orientation, book an appointment with Mercedes-Benz of Sudbury and we’ll handle installation and disposal.

• Verify airflow arrows when installing the new filter
• Consider activated-carbon media for odor reduction
• Schedule service for professional fitment

The engine air filter protects the 3.0L turbo inline‑6 from debris, while the cabin air filter cleans the air passengers breathe through the HVAC system.

The engine filter is a high-flow panel that lives in the sealed airbox and helps maintain performance and fuel economy. The cabin filter is a particulate (often carbon-enhanced) element inside the HVAC housing that reduces dust, pollen, and odors. Both are separate parts with different service needs, and both are available as Mercedes‑Benz Genuine Parts at our Sudbury location.

• Engine filter: panel media in the intake airbox
• Cabin filter: particulate/activated‑carbon media in HVAC
• Each has its own service interval and access

Common signs include reduced power or MPG, rough idle, weak HVAC airflow, and musty cabin odors.

The turbocharged engine in the 2020 Mercedes-Benz CLS-Class is sensitive to intake restriction, so a dirty engine filter can dull throttle response. A clogged cabin filter can limit fan output and allow stale smells to linger, especially after heavy pollen periods. If you notice any of these symptoms, book a check at Mercedes-Benz of Sudbury; we’ll inspect both filters and related seals.

• Sluggish acceleration and lower fuel economy
• HVAC airflow weak on all fan speeds
• Persistent musty or dusty odors in the cabin

Yes—engine filters are often DIY-friendly, but cabin filters may require trim removal; dealer service adds OEM parts, intake/MAF checks, and documentation.

If you’re comfortable with basic tools, you can usually replace the engine filter on the 2020 Mercedes-Benz CLS-Class. The cabin filter’s access can be tighter, and correct airflow orientation matters. Our technicians verify seals, inspect the MAF sensor area, and record the service for maintenance history. Prefer professional help? Schedule service online.

• DIY needs Torx/Phillips tools and care with clips
• Dealer checks intake ducts, gaskets, and MAF area
• OEM-spec filters fitted and disposed of properly

Yes—Mercedes‑Benz of Sudbury installs Mercedes‑Benz Genuine Parts filters that meet factory specifications.

OEM filters match the CLS-Class airbox and HVAC housing dimensions and media requirements, supporting performance and cabin air quality. Factory-spec materials help maintain proper sealing and sensor readings on the 3.0L turbo inline‑6. Check our current service specials, then schedule service for professional installation.

• Factory-correct fit, media, and airflow
• Installed by brand-trained technicians
• Documented on your service record

Follow the interval in your owner’s manual for the 2020 Mercedes-Benz CLS-Class, checking more often during high‑pollen seasons.

Driving in Greater Boston traffic and seasonal pollen can load the cabin filter faster. If you notice reduced airflow or odors, replace sooner. For an interval check and proper fitment, use our online tool to schedule service at Mercedes-Benz of Sudbury.

• Inspect at each oil service visit
• Replace early if airflow weakens or odors persist
• Consider activated‑carbon media for odor control

Follow the factory maintenance schedule in the owner’s manual for the 2020 Mercedes-Benz CLS-Class, inspecting more often in dusty or stop‑and‑go conditions.

The 3.0L turbo inline‑6 benefits from a clean, low‑restriction intake to support performance and fuel economy. If your driving includes construction zones, winter road grit, or long commutes, check the filter earlier. For guidance and OEM parts, review our service specials and schedule service.

• Inspect at each multi‑point check
• Replace sooner if visibly dirty or deformed
• Record the date/mileage for maintenance history

Our service begins with verification of the correct Mercedes‑Benz Genuine Parts for your 2020 Mercedes-Benz CLS-Class. We inspect the intake housing, clips, and gaskets for damage, then remove and replace the engine air filter, ensuring the sealing surfaces are clean and properly seated. For the cabin air filter, we access the HVAC housing (typically behind the glove box), remove the used element, and install a fresh filter with the correct airflow direction. A visual check of the MAF sensor area and intake ducting helps catch early issues. We road‑test if needed and document the work for your records. See current service specials and schedule service online for a convenient appointment.

The 2020 Mercedes-Benz CLS-Class uses a high‑flow panel engine air filter inside a sealed airbox feeding its 3.0L turbocharged inline‑6. The cabin air filter is a multi‑layer particulate element, with an available activated‑carbon variant to help manage odors and fine particles. Mercedes‑Benz Genuine Parts provide precise fitment and media density calibrated for factory intake and HVAC performance. Follow the maintenance schedule in your owner’s manual for replacement timing, and consider more frequent inspections if you drive through dust, road work, or seasonal pollen. A clean engine filter supports throttle response and fuel economy; a fresh cabin filter maintains HVAC airflow and in‑cabin air quality. Bring your 2020 Mercedes-Benz CLS-Class to Mercedes-Benz of Sudbury in Sudbury for OEM-spec filter service — schedule service.

Mercedes-Benz of Sudbury serves Sudbury, Concord, Framingham, Wellesley, and the Greater Boston area with OEM-spec air filter service for the 2020 Mercedes-Benz CLS-Class. Local driving can expose filters to seasonal pollen and typical road debris, which gradually restricts airflow. Our certified technicians inspect both engine and cabin filters, verify sealing surfaces, and ensure proper fitment to preserve performance and comfort. You can find us at 141 Boston Post Road, Route 20, Sudbury, Massachusetts. Review our current service specials and schedule service online for a time that fits your day. If you prefer clear documentation for your maintenance history, we’ll record parts and labor on your service file and answer any follow‑up questions.