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Bosch P3743WS - Cabin Air Filter
Product Overview
The Bosch Cabin Air Filter P3743WS is designed to provide superior filtration for your Mercedes-Benz, ensuring a clean and healthy cabin environment. Engineered to meet or exceed OEM standards, this filter effectively traps harmful airborne particles, including dust and pollen, allowing you to breathe fresh air while driving. With its activated charcoal technology, the Bosch P3743WS enhances protection by capturing odors and pollutants, making it an essential component for maintaining air quality in European vehicles. Regular replacement is recommended every 12 months or 12,000 miles for optimal performance. Choose Bosch P3743WS for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Bosch P3743WS is equivalent to or replaces the following part numbers: 2118300018
Vehicle Compatibility
- Mercedes-Benz CLS550 5.5 V8 (2006–2011)
- Mercedes-Benz CLS63 AMG 6.3 V8 (2006–2011)
- Mercedes-Benz E320 Bluetec 3.0 V6 (2006–2009)
- Mercedes-Benz E350 3.5 V6 (2006–2011)
- Mercedes-Benz E550 5.5 V8 (2006–2011)
- Mercedes-Benz E63 AMG 6.3 V8 (2007–2011)
- Mercedes-Benz E500 5.0 V8 (2006–2007)
- Mercedes-Benz E55 AMG 5.5 V8 (2005–2007)
This may also fit other applications. Please use the vehicle selector tool to verify fitment.
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
- Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Established Trust: Serving the European auto community since 2000.
Frequently Asked Questions
What does the Bosch P3743WS Cabin Air Filter do?
The Bosch Cabin Air Filter plays a vital role in the vehicle's HVAC system, filtering out dust, pollen, and other harmful particles from the air entering the cabin. This ensures that passengers breathe clean air, enhancing comfort and health during travel.
How do I know if my Cabin Air Filter needs replacement?
Common indicators that your cabin air filter may need replacement include unpleasant odors emanating from the HVAC system, reduced airflow from the vents, and an increase in dust or pollen inside the vehicle. Regular inspection is recommended to maintain air quality.
Can I install the Bosch P3743WS myself?
What are the symptoms of a faulty Cabin Air Filter?
Symptoms of a faulty cabin air filter include reduced air quality within the vehicle, musty odors, and decreased airflow from vents. Regular maintenance and replacement are essential to prevent these issues.
Why should I choose Bosch for my Cabin Air Filter needs?
Choosing Bosch ensures that you receive a high-quality, factory-correct replacement that restores safety and performance. Order Bosch P3743WS today for a dependable solution that enhances your driving experience.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandBosch
- ManufacturerBosch
- MPNP3743WS
- Part TypeCabin Air Filter
- OE Part Numbers2118300018
- FeaturesActivated Carbon Pre-Filter For Odor Removal : No
Automotive Item Type : OEM Standard Part
Automotive Material : Foam
Cabin Filter Type : Particulate
Cases Per Pallet (ORLY) : 40
Filter Media Material : Spunbound Polyester Along With Synthetic Meltblow Fibers
Filter Quantity : 1
HEPA Filter : No
Height : 1.023622
Previously cataloged as # : P3743
Prop 65 Warning Label Required? : No
Recommended Replacement Interval : 12000 mi
Unit(s) per Car Qty (ORLY) : 1
Width : 10.07874
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2003 | Mercedes-Benz | E320 | 4Matic (3.2 V6 GAS) | Engine: 112.949, Notes: Fresh Air Cabin Filter |
| 2003 | Mercedes-Benz | E320 | Base (3.2 V6 GAS) | Engine: 112.949, Notes: Fresh Air Cabin Filter |
| 2003 | Mercedes-Benz | E500 | Base (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2003 | Mercedes-Benz | E55 AMG | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2004 | Mercedes-Benz | E320 | 4Matic (3.2 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2004 | Mercedes-Benz | E320 | Base (3.2 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2004 | Mercedes-Benz | E500 | 4Matic (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2004 | Mercedes-Benz | E500 | Base (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2004 | Mercedes-Benz | E55 AMG | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2005 | Mercedes-Benz | E320 | 4Matic (3.2 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2005 | Mercedes-Benz | E320 | Base (3.2 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2005 | Mercedes-Benz | E320 | CDI (3.2 L6 DIESEL) | Notes: Fresh Air Cabin Filter |
| 2005 | Mercedes-Benz | E500 | 4Matic (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2005 | Mercedes-Benz | E500 | Base (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2005 | Mercedes-Benz | E55 AMG | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2006 | Mercedes-Benz | CLS500 | Base (5.0 V8 GAS) | |
| 2006 | Mercedes-Benz | CLS55 AMG | Base (5.5 V8 GAS) | |
| 2006 | Mercedes-Benz | E350 | 4Matic (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2006 | Mercedes-Benz | E350 | Base (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2006 | Mercedes-Benz | E320 | CDI (3.2 L6 DIESEL) | Notes: Fresh Air Cabin Filter |
| 2006 | Mercedes-Benz | E500 | 4Matic (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2006 | Mercedes-Benz | E500 | Base (5.0 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2006 | Mercedes-Benz | E55 AMG | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2007 | Mercedes-Benz | CLS63 AMG | Base (6.3 V8 GAS) | |
| 2007 | Mercedes-Benz | E63 AMG | Base (6.3 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2007 | Mercedes-Benz | CLS550 | Base (5.5 V8 GAS) | |
| 2007 | Mercedes-Benz | E350 | 4Matic (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2007 | Mercedes-Benz | E350 | Base (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2007 | Mercedes-Benz | E550 | 4Matic (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2007 | Mercedes-Benz | E550 | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2007 | Mercedes-Benz | E320 | Bluetec (3.0 V6 DIESEL) | Notes: Fresh Air Cabin Filter |
| 2008 | Mercedes-Benz | CLS550 | Base (5.5 V8 GAS) | |
| 2008 | Mercedes-Benz | CLS63 AMG | Base (6.3 V8 GAS) | |
| 2008 | Mercedes-Benz | E320 | Bluetec (3.0 V6 DIESEL) | Notes: Fresh Air Cabin Filter |
| 2008 | Mercedes-Benz | E350 | 4Matic (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2008 | Mercedes-Benz | E350 | Base (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2008 | Mercedes-Benz | E550 | 4Matic (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2008 | Mercedes-Benz | E550 | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2008 | Mercedes-Benz | E63 AMG | Base (6.3 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2009 | Mercedes-Benz | CLS550 | Base (5.5 V8 GAS) | |
| 2009 | Mercedes-Benz | CLS63 AMG | Base (6.3 V8 GAS) | |
| 2009 | Mercedes-Benz | E320 | Bluetec (3.0 V6 DIESEL) | Notes: Fresh Air Cabin Filter |
| 2009 | Mercedes-Benz | E350 | 4Matic (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2009 | Mercedes-Benz | E350 | Base (3.5 V6 GAS) | Notes: Fresh Air Cabin Filter |
| 2009 | Mercedes-Benz | E550 | 4Matic (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2009 | Mercedes-Benz | E550 | Base (5.5 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2009 | Mercedes-Benz | E63 AMG | Base (6.3 V8 GAS) | Notes: Fresh Air Cabin Filter |
| 2010 | Mercedes-Benz | CLS550 | Base (5.5 V8 GAS) | |
| 2010 | Mercedes-Benz | CLS63 AMG | Base (6.3 V8 GAS) | |
| 2011 | Mercedes-Benz | CLS550 | Base (5.5 V8 GAS) | |
| 2011 | Mercedes-Benz | CLS63 AMG | Base (6.3 V8 GAS) |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.






