In most Mercedes-Benz E350 models, the cabin air filter is located behind the glove box on the passenger side. To replace it, drop the glove box or remove the access panel, swap in a new activated-carbon filter with the airflow arrows pointing toward the blower, then reassemble. Plan on about 15 to 30 minutes.
The cabin air filter helps remove pollen, dust and odors from the air entering the HVAC system and supports overall interior air quality and system performance. Access can vary by model year and trim, so consult your owner's manual for the exact procedure for your car. The guide below covers the two common access routes and includes tips to ensure a proper seal and appropriate replacement timing.
Accessing the cabin air filter
Glove box access (most common on recent E350 models)
Use this route if your E350’s filter sits behind the glove box. This method works for many mid-2010s to present E-Class configurations.
- Turn off the engine and clear the glove box of contents.
- Open the glove box completely; locate the glove box stops or a dampers on the side.
- Gently squeeze the sides or release the damper to allow the glove box to drop, giving access to the filter housing behind it.
- Unclip or unscrew the filter cover; slide out the old filter, noting the orientation of the airflow arrows.
- Clean the filter housing with a clean cloth and inspect for moisture, mold or debris.
- Insert the new cabin air filter with the arrows pointing toward the blower; reseat and secure the filter cover.
- Reposition the glove box and re-engage the stops or damper; ensure the glove box opens and closes smoothly.
Concluding note: If the glove box method doesn’t work for your car, or the glove box won’t drop fully, proceed to the under-dash access described below for an alternative route.
Under-dash or passenger-side dash panel access (alternative)
Some E350 variants or older configurations may use an access panel near the passenger footwell or beneath the lower dash. Use this path if the glove box route isn’t feasible.
- Turn off the engine and HVAC; ensure no electrical components are active.
- Locate and remove the access panel on the passenger side footwell or under the dash using a screwdriver or trim tool as needed.
- Expose the filter housing; remove the old filter, noting its orientation with the airflow arrows.
- Clean the housing and install the new filter with arrows toward the blower; reseal the housing and reattach the access panel.
- Verify the panel is securely fastened and test the HVAC to ensure airflow is normal.
Concluding note: If you’re unsure which route your E350 uses, consult the owner's manual or a service guide specific to your model year, or ask a dealer or qualified technician for guidance.
What you’ll need
Before you start, gather these items so you can complete the job in one session:
- Replacement cabin air filter designed for your E350 (activated carbon/pollen filter as recommended by Mercedes).
- Basic tools: a screwdriver set and, if needed, a trim tool to relieve panels without damage.
- Clean cloth for dust removal and a quick visual inspection of the filter housing.
Note: Use a quality OEM or aftermarket filter that matches your vehicle’s specifications. Avoid forcing a filter into a housing that is too tight, and ensure a proper seal around the housing after installation.
Maintenance timing and tips
Maintenance timing for cabin air filters varies by environment. A general guideline is to inspect and replace the filter every 12–24 months or roughly every 15,000–30,000 miles, with more frequent changes in dusty or urban settings or if you notice reduced airflow or odors. After replacement, check that the HVAC system operates with strong airflow and no unusual smells.
Summary
Most E350s place the cabin air filter behind the passenger-side glove box, with an alternative access route under the dash in some configurations. Follow the step-by-step instructions to remove the old filter, insert a new activated-carbon filter with the correct orientation, and reassemble. Regular replacement keeps interior air clean and the HVAC system functioning at its best. If in doubt, refer to your owner’s manual or seek professional assistance.