MERCEDES A2075420120 Front Left Right High Tone Horn Signal W207-W212-E350-E500 Benz B449

( Manufacturer Part Number: A2075420120 ), ( Type: Horn ), ( Ipn: W207 W212 E350 E500 ), ( Oe/oem Part Number: E-class E Class Mercedes Benz Mb Original Oem ), ( Manufacturer Warranty: 1 Month ), ( Color: Black ), ( Vintage Part: No ), ( Country Of Origin: Germany )

Review MERCEDES benz Class Front Left And Right High Low Tone Horn Signal fits 2010–2013

The **Mercedes-Benz A2075420120 (B449) Front Left/Right High-Tone Horn Signal** is a precision-engineered audio component designed exclusively for the **W207 generation of Mercedes-Benz C-Class sedans and coupes** produced between **2010 and 2013**. This high-performance horn assembly combines cutting-edge acoustics with robust durability, delivering a sharp, authoritative high-tone signal that enhances both safety and brand identity. Crafted from high-quality materials, including a reinforced metal housing and a durable polymer casing, this horn is built to withstand the rigors of daily driving while maintaining optimal sound projection. The **B449** designation ensures compatibility with the vehicle s integrated horn system, providing seamless integration with the existing electrical and mechanical infrastructure. Whether navigating tight urban streets or signaling in low-visibility conditions, this horn emits a crisp, resonant tone that commands attention without unnecessary volume, adhering to Mercedes-Benz s signature blend of sophistication and functionality. Ideal for owners seeking to restore or upgrade their vehicle s original horn system, this component is a direct OEM replacement, ensuring a perfect fit and reliable performance for years to come.

### **Pros and Cons of buying a Mercedes-Benz A2075420120 (W207, 2010 2013) Front Left/Right High-Tone Horn Signal (B449)**

1. **OEM Quality and Fit** This is an original Mercedes-Benz part, ensuring a perfect fit and seamless integration with the vehicle s electrical and mechanical systems. Aftermarket parts may not match as closely, potentially leading to misalignment or poor performance.

2. **Reliability and Durability** Mercedes-Benz parts are engineered to meet strict quality standards, reducing the risk of premature failure compared to generic or low-quality replacements. The B449 high-tone horn is designed to last for the lifespan of the vehicle if properly maintained.

3. **Sound Quality and Functionality** The high-tone horn is designed to produce a sharp, attention-grabbing sound, which is crucial for safety in urban driving or when navigating tight parking spaces. It is more effective than some aftermarket horns in alerting other drivers.

4. **Compatibility with Modern Systems** The B449 horn is compatible with the W207 s electrical system, including the horn control module and driver-assistance features (e.g., adaptive cruise control or collision warning systems that may interact with the horn).

5. **Resale Value and Authenticity** Using an OEM part preserves the vehicle s original condition, which can be beneficial if you plan to sell or trade-in the car later. It also avoids the risk of voiding warranties or causing issues with future inspections.

6. **Ease of Installation** Since it is an original part, wiring and mounting should align perfectly with the factory setup, reducing the complexity of installation compared to aftermarket alternatives that may require modifications.

7. **Warranty Coverage** If purchased from an authorized Mercedes-Benz dealer or a reputable supplier, the part may come with a warranty, providing peace of mind against defects.

---

1. **High Cost** OEM parts from Mercedes-Benz are significantly more expensive than aftermarket alternatives. The price of the A2075420120 horn (or a complete set for left/right) can be 2 3 times higher than a generic replacement, making it a substantial investment if the horn is the only issue.

2. **Limited Availability and Lead Times** OEM parts may not be readily available at local auto parts stores. Purchasing from an authorized dealer or online specialty suppliers (e.g., MBB, RockAuto, or eBay from verified sellers) could result in longer wait times, especially for discontinued models like the W207.

3. **Potential Overkill for Minor Issues** If the horn is the only failing component and the rest of the vehicle is in good condition, replacing it with an OEM part may be unnecessary. In such cases, a high-quality aftermarket horn (e.g., from Bosch, Denso, or a trusted brand) could suffice at a fraction of the cost.

4. **Risk of Theft or Counterfeit Parts** When buying online, there is a risk of receiving counterfeit or stolen parts, especially from unverified sellers. Always purchase from reputable sources with return policies or authentication guarantees.

5. **Installation Complexity** While the part fits perfectly, replacing a horn may require disconnecting the battery, removing the grille or bumper panels, and routing wires. If you lack mechanical experience, professional installation may be necessary, adding to the cost.

6. **Environmental and Ethical Concerns** Purchasing new OEM parts contributes to e-waste and resource consumption. If the horn is still functional but misplaced (e.g., from a salvaged vehicle), recycling or repurposing it could be a more sustainable option.

---

The **Mercedes-Benz A2075420120 (B449) high-tone horn** is a superior choice for owners seeking **authenticity, reliability, and optimal performance** in their W207 model. Its OEM status ensures compatibility, longevity, and peace of mind, particularly for those who prioritize maintaining the vehicle s original specifications. However, the **high cost and potential overkill for minor issues** make it less ideal for budget-conscious buyers or those only addressing a single component failure.

For most owners, the **pros outweigh the cons** if the horn is a critical concern (e.g., a safety hazard or part of a full restoration). If the horn is the only failing part and the vehicle is otherwise sound, a **high-quality aftermarket alternative** could be a cost-effective compromise without sacrificing performance.

---

- You are restoring or maintaining the vehicle to factory specifications.

- The horn is part of a larger electrical or safety system upgrade.

- You value long-term reliability and warranty coverage.

- You have the budget to invest in genuine Mercedes-Benz parts.

- The horn is the only failing component, and the vehicle is otherwise in good condition.

- You are on a tight budget and can find a reputable aftermarket horn (e.g., Bosch 199, Denso, or a Mercedes-compatible brand) that meets your sound and durability needs.

- You are comfortable with installation and willing to research compatible parts.

- **Authorized Mercedes-Benz Dealers** (most reliable but expensive).

- **Specialty Online Retailers** (e.g., MBB, RockAuto, eBay from verified sellers with positive feedback).

- **Salvage Yards or Junkyards** (if the part is available for recycling/reuse at a lower cost).

- Disconnect the battery before working on electrical components.

- Follow the wiring diagram in the W207 service manual to ensure correct connections.

- Test the horn after installation to confirm proper function and sound quality.

Ultimately, the decision depends on your **priorities, budget, and the vehicle s overall condition**. For a W207 owner who values consistency and performance, the OEM horn is the best choice. For others, a well-researched aftermarket option can deliver similar results at a lower cost.

Details:

part #: a2075420120 prices

• $32.20-$50.00

specifications steeringwheelsiiz:

• for makes: Mercedes
• for years: 2010-2013
• mpn: A2075420120
• type: Horn
• ipn: W207 W212 E350 E500
• oe/oem part number: E-class E Class Mercedes Benz Mb Original Oem
• manufacturer warranty: 1 Month
• color: Black
• vintage part: No
• country of origin: Germany

returns steeringwheelsiiz:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

seller steeringwheelsiiz:

• rating: 99.9%
• city: Sacramento, California
• # reviews: 7905

offer steeringwheelsiiz:

• quantity: 1
• availability: In Stock
• sold: 0
• best offers: True
• started: March 9, 2026
• options: Ship-to-home

shipping steeringwheelsiiz:

• type: Fixed
• class: Standard
• service: Standard
• cost: $0.00
• transit: 3-7 Days

payments steeringwheelsiiz:

• wallet: Paypal
• credit card: Discover
• other

general steeringwheelsiiz:

• Car Truck Parts Accessories > Interior Parts Accessories > Steering Wheels Horn Buttons
• condition: Used

Mercedes A2075420120 Is Similar To:

• 000-460-1803-9e38 Mercedes-benz W205 C-class And Glc-class (37.7% similar) No scratches or dents. Brand new at a great price 9E38. New never used without original box. Dont miss out. This is an original mercedes benz part...(February 11th, 2017)
• 000-460-40-03-3d16 Mercedes Benz Class Amg Steering Wheel (32.7% similar) Willing to sell black with red stitching steering wheel out from 2016 mercedes benz C450 Agm oem part number: 3D16...(February 4th, 2019)
• 0004622323 Mercedes Benz Steering Wheel Column Cover (24.3% similar) This item came out of a 2003 mercedes C320 RWD 4DR sedan. Mercedes benz W203 steering wheel column cover. Please reference the item number to help you find out if it is right part for listed. This item will come as it is pictured...(May 12th, 2018)
• 00246017037n31 Mercedes-benz Mercedes Oem 14-17 (26.6% similar) Est, mon to Fri...(November 12th, 2017)
• 002952 Hella Electric Horn Mercedes Benz Grey Vehicle Car Sedan New (29.4% similar) I want to make you happy and fix the issue.the horn uses 24 volts and 335HZ. This is military surplus. The part number is and Nan. The horn is new and ready to be used. The horn is for a mercedes-benz. For sale is a new hell electric horn. I want to help...(May 19th, 2018)
• 0045429520 Genuine Horn Mercedes-benz Oem (21.9% similar) ...(November 17th, 2014)
• 0055307-am80s-r Fits Mercedes Benz Horn (23.7% similar) Please refer to pictures for item condition...(June 6th, 2018)
• 0055423420 A0055423420 A 005 542 34 20 3420 Mercedes Amg Left Driver Side Horn High Note Tone (30.7% similar) Accessories sold separately for engines include alternators, starters, compressors, steering pumps, coil packs, turbos, super chargers, distributors, throttle bodies, engine wiring harnesses and intake manifolds. Wash hands after handling. What you see is get unless stated otherwise. Greyhound is ...(January 8th, 2019)
• 0055426520 Genuine Oem Horn Mercedes-benz (19% similar) ...(September 4th, 2014)
• Mercedes-benz 0055426920 Horn Oem Genuine (39.4% similar) ...(September 4th, 2014)
• Mercedes-benz Oem 0065425820 Horn Genuine (39.4% similar) ...(September 4th, 2014)