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

It’s in the engine bay ahead of the 4.7L twin‑turbo V8 intake ducts, sealed inside the airbox.

Open the hood and you’ll find the airbox mounted forward in the bay, with clips or screws securing the lid. Replacing the element requires careful reseating of the perimeter seal to avoid unmetered air that can affect performance. If you’d prefer a professional install and inspection, you can schedule service at Mercedes-Benz of Sudbury.

• Access via airbox fasteners; avoid stressing nearby MAF wiring.
• Confirm the new filter’s orientation and gasket seating.
• Dispose of the old filter responsibly; check the housing for debris.

It’s typically behind the glove box on the passenger side, inside the HVAC housing.

The SL-Class uses a cabin microfilter to clean air entering the ventilation system for both occupants. Access often involves lowering the glove box and removing a trim cover to reach the rectangular filter slot. If you’d like a technician to handle fitment and reassembly, book a schedule service appointment.

• Remove glove box stops/cover to access the HVAC filter door.
• Align airflow arrows per the housing markings during install.
• Snap the access panel fully closed to prevent rattles or leaks.

The engine air filter protects the 4.7L V8’s combustion air, while the cabin filter cleans incoming HVAC air for passengers.

The engine filter helps the twin-turbo V8 deliver its rated 449 hp and 516 lb‑ft by keeping intake air clean. The cabin microfilter targets dust and allergens so the two-seat interior stays comfortable. Both should be replaced with OEM-spec media to ensure proper fit and flow.

• Engine filter location: sealed airbox in the engine bay.
• Cabin filter location: HVAC housing behind the glove box.
• Impact: performance/efficiency vs. occupant comfort/air quality.

Watch for fuel economy dropping below the EPA 17/25 mpg rating, slower acceleration, rough idle, weak HVAC airflow, or musty odors.

A dirty engine filter can mute the SL-Class’s turbo response and raise intake restriction; a dirty cabin filter reduces blower output and can cause foggy windows. If symptoms appear, replace the appropriate filter and have the intake tract inspected. You can schedule service or check service specials for offers.

• Visible debris or darkened pleats on the removed filter.
• HVAC set to high but airflow remains weak or noisy.
• Engine hesitation under load; inspect MAF and housing seal.

Engine filters are generally DIY-friendly via the airbox, while cabin filters may require glove box trim removal and delicate clips.

DIY works if you’re comfortable reseating seals and handling interior trim. Dealer service adds an intake housing check, a visual MAF inspection, and confirmation that the OEM-spec filter meets Mercedes-Benz requirements. If you want a quick, verified install, schedule service online.

• Basic hand tools needed; avoid prying on plastic tabs.
• Inspect ducts and gaskets for cracks or misalignment.
• Choose OEM-spec media to maintain proper flow and fit.

Yes—Mercedes-Benz of Sudbury installs OEM-spec Mercedes-Benz Genuine Parts filters sized for the SL-Class airbox and HVAC.

Factory-spec filtration helps protect the 4.7L twin-turbo V8 and keeps cabin air clean without overloading the blower. Using the correct media also ensures proper fit, sealing, and airflow. For OEM-spec parts and installation, schedule service or review service specials.

• Correct fitment for the SL-Class intake and HVAC housings.
• Meets Mercedes-Benz filtration and flow requirements.
• Installed by brand-trained technicians with model familiarity.

Follow the interval listed in your 2020 Mercedes-Benz SL-Class maintenance booklet for the 4.7L twin‑turbo V8.

Driving environments and mileage vary, so Mercedes-Benz specifies the correct service interval for your vehicle in its maintenance schedule. Inspect the filter at regular service visits and replace sooner if it shows heavy debris or damage. If you’d like a professional assessment, schedule service with Mercedes-Benz of Sudbury.

• Use OEM-spec media to maintain rated performance.
• Check for torn pleats or missing seals during inspection.
• Document replacements in your service records.

Replace it per the schedule in your SL-Class maintenance booklet, as the cabin microfilter is a time-and-usage item.

Cabin filter life depends on exposure to dust and contaminants; Mercedes-Benz provides the correct interval in the owner’s materials. If airflow weakens or odors develop, replace it sooner. For a quick inspection and replacement, use our schedule service tool.

• Monitor HVAC airflow and odor between service visits.
• Install with arrows aligned to the housing’s airflow.
• Consider OEM-spec charcoal media for odor control.

Mercedes-Benz of Sudbury services 2020 Mercedes-Benz SL-Class models for drivers in Sudbury, Concord, Framingham, Wellesley, and the Greater Boston area. Our dealership at 141 Boston Post Road, Route 20, offers online scheduling and current service specials to make maintenance straightforward. Professional installation helps keep the SL-Class’s intake sealed and its HVAC breathing freely, supporting performance and comfort in this two-seat convertible. If you’re planning a visit, use our schedule service tool to choose a time that fits your day and arrive via Route 20 directly to our service entrance. We’ll confirm parts fitment for your VIN and complete the job with an intake and HVAC check before you leave.

Our air filter service addresses both filtration circuits on your 2020 Mercedes-Benz SL-Class. A technician will remove the engine airbox cover, inspect and replace the engine air filter, and check the intake housing for debris or seal damage. The cabin microfilter is inspected and replaced as needed, with attention to airflow direction and proper latching of the HVAC access door. We also perform a visual check of the mass airflow sensor and intake ducting for secure connections. All old filters are properly disposed of. To book your visit, use our online schedule service tool, and don’t forget to review current service specials before checkout.

The 2020 Mercedes-Benz SL-Class features a 4.7L V (4663 cc) twin‑turbocharged gasoline engine (premium unleaded required) rated at 449 hp at 5,500 rpm and 516 lb‑ft at 1,800 rpm. A properly fitted engine air filter supports airflow and protects turbochargers and the MAF sensor. The cabin microfilter cleans incoming HVAC air for the two-passenger interior (EPA class: Two Seaters). Always use OEM-spec filters sized for the SL-Class airbox and HVAC housing to maintain sealing and flow. If you’re unsure about your maintenance schedule, our team can check the required interval and part specification for your VIN. Bring your 2020 Mercedes-Benz SL-Class to Mercedes-Benz of Sudbury in Sudbury for OEM-spec filter service — schedule service.