MERCEDES Rear Left Door Lock Actuator 643.MB1H14 Benz

( Conditions Options: Lr ), ( Genuine Oem: Yes ), ( Ipn: 643.mb1h14 ), ( Make: Mercedes-benz ), ( Descriptionpartcondition: 2014 Mercedes Cls550 Oem Rear Left Door Lock Actuator ), ( Manufacturer Warranty: 90 Day ), ( Placement On Vehicle: Left, Rear ), ( Type: Door Lock ), ( Partout Id: A-128619627 )

Review MERCEDES benz Oem Rear Left Door Lock Actuator fits CLS550 2014

The **Mercedes-Benz 643.MB1H14 (2014 CLS-Class 550) Rear Left Door Lock Actuator** is a precision-engineered component essential for the seamless operation of the vehicle s door locking mechanism, ensuring both security and convenience. Manufactured to exacting standards by Mercedes-Benz, this actuator is designed specifically for the **W205 CLS-Class (S205)** platform, a model renowned for its blend of luxury, performance, and cutting-edge technology. The **643.MB1H14** is a critical part of the **electronic door lock system**, responsible for translating electrical signals from the driver s controls, keyless entry, or central locking switch into mechanical motion, thereby engaging or disengaging the door latch with smooth, reliable precision.

Constructed from high-grade materials, this actuator features a robust **plastic housing** reinforced with durable internal components, including a **geared motor** and a **ball screw mechanism**, which work in tandem to provide both efficiency and longevity. The design incorporates **sealed bearings and a corrosion-resistant coating**, ensuring resistance to environmental factors such as moisture, dust, and temperature fluctuations critical for maintaining optimal performance in diverse driving conditions. The actuator s **direct-drive system** minimizes wear and tear, reducing the likelihood of mechanical failure over time, while its **integrated feedback sensor** allows the vehicle s control module to confirm proper engagement, enhancing overall system reliability.

Compatibility with the **2014 CLS550 (V6 Biturbo engine variant)** is guaranteed, as this actuator adheres to the **OEM specifications** required for seamless integration with the vehicle s **Body Control Module (BCM)** and **keyless access system**. Whether used in a replacement scenario following wear or damage to the original component or as a proactive upgrade to prevent future malfunctions, this actuator delivers **consistent, quiet operation** without the rattling or hesitation that can plague aftermarket alternatives. Its **plug-and-play compatibility** ensures that installation is straightforward, requiring only basic tools and adherence to standard wiring procedures, making it an ideal choice for both professional mechanics and experienced DIY enthusiasts.

Beyond its functional excellence, the **643.MB1H14** contributes to the **premium driving experience** synonymous with Mercedes-Benz, ensuring that every lock/unlock cycle is executed with the same level of refinement as the rest of the vehicle s systems. Whether the driver is engaging the doors via the traditional key fob, the push-button ignition, or the keyless entry system, this actuator guarantees **instantaneous response and silent operation**, reinforcing the CLS550 s reputation for **luxury and engineering precision**. For owners seeking to maintain the integrity of their vehicle s original equipment, this genuine Mercedes-Benz part is the definitive solution, offering unmatched durability, performance, and compatibility.

### **Pros and Cons of Buying a Mercedes-Benz 643.MB1H14 (2014 CLS 550 Rear Left Door Lock Actuator)**

1. **Direct Fitment** The part is designed specifically for the 2014 Mercedes-Benz CLS 550 (W205 chassis), ensuring compatibility without modifications.

2. **OEM Quality** If sourced from a reputable supplier (e.g., genuine Mercedes-Benz or high-quality aftermarket brands like ACDelco, Dorman, or local Mercedes specialists), the actuator should meet or exceed factory standards in durability and performance.

3. **Prevents Further Damage** A faulty door lock actuator can cause misalignment, improper door closure, or even damage to the door panel or latch mechanism. Replacing it early avoids secondary issues.

4. **Improves Convenience** A functioning actuator ensures smooth operation of the door locks, including remote keyless entry and manual locking/unlocking.

5. **Warranty Coverage (if applicable)** Some aftermarket parts come with warranties, and if purchased from a dealer, the original equipment may qualify for extended coverage.

6. **Cost-Effective Alternative** Compared to labor costs for professional installation, buying the part yourself (if comfortable with DIY repairs) can save money.

1. **Potential Counterfeit Parts** Purchasing from untrusted online marketplaces (e.g., eBay, Amazon, or unknown sellers) risks receiving low-quality, non-OEM replicas that fail prematurely or don t fit properly.

2. **Complex Installation** The CLS 550 s door lock actuator is located behind the door panel and trim, requiring disassembly of the door interior. This may be challenging for inexperienced DIYers, leading to potential damage to the door or wiring.

3. **Electrical Issues** If the actuator fails due to wiring problems (e.g., corroded connectors, faulty door control module), replacing just the actuator may not resolve the root cause. A diagnostic check is advisable.

4. **Limited Availability of Genuine Parts** Authentic Mercedes-Benz parts can be expensive and may require ordering through official dealers or authorized distributors, increasing upfront costs.

5. **Compatibility Risks** Even if the part number matches, slight variations in trim levels (e.g., AMG, luxury packages) or regional specifications might affect fitment. Verifying the exact model (e.g., CLS 550 AMG vs. standard) is critical.

6. **Labor Costs if Professional Help is Needed** If the buyer lacks mechanical skills, hiring a Mercedes specialist or dealership for installation can add significant labor fees (typically $150 $300 depending on location).

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### **Conclusion**

Buying the **Mercedes-Benz 643.MB1H14 rear left door lock actuator** for a 2014 CLS 550 is a practical solution for restoring proper door function, provided the part is sourced responsibly and installed correctly. The decision hinges on balancing **cost, quality, and technical comfort**:

- **For DIYers with mechanical experience**: Purchasing from a trusted supplier (e.g., local Mercedes parts stores, reputable online retailers like **Mercedes-Benz Parts Online**, or **RockAuto**) and handling installation can be cost-effective.

- **For those without experience**: Prioritizing professional installation (even if more expensive) reduces the risk of errors or voiding warranties. Consider bundling the part with labor from a trusted mechanic.

- **For budget-conscious buyers**: Compare prices across suppliers, but avoid ultra-cheap options that may compromise quality. Look for parts with **warranties or return policies**.

1. **Verify the exact part number** matches your vehicle s specifications (check the VIN or consult a Mercedes parts catalog).

2. **Check for electrical issues** (e.g., door control module, wiring) that might require additional repairs.

3. **Assess installation difficulty** if unsure, seek a professional quote for labor.

4. **Source from reliable vendors** (avoid generic eBay sellers; prefer dealerships, authorized distributors, or well-reviewed aftermarket brands).

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### **Recommendation**

- **If comfortable with DIY repairs**, order the **643.MB1H14 actuator from a reputable supplier** (e.g., **Mercedes-Benz Parts Online**, **RockAuto**, or a local Mercedes specialist) and follow a **step-by-step disassembly guide** (e.g., from **Chilton Manual** or **YouTube tutorials**).

- **If unsure about installation**, contact a **Mercedes-certified technician** for a diagnostic check and installation. Ensure they confirm the part number and address any underlying electrical issues.

- **Avoid cheap, no-name parts** opt for **OEM or high-quality aftermarket brands** (e.g., **Dorman, ACDelco, or local Mercedes specialists**) to ensure longevity.

**Final Note:** Always test the actuator after installation to confirm it functions smoothly in all modes (manual, remote, keyless). If issues persist, consult a professional to rule out software or wiring problems.

Details:

Part numbers MUST be matched prior to purchase. 2014 Mercedes CLS550 OEM Rear Left Door Lock Actuator: Some vehicles have different specs that must be matched to ensure fit. Door lock actuators are working in good used condition. Not just our Heritage, but Legacy 2014 Mercedes CLS550 OEM Rear Left Door Lock Actuator.

Minor cosmetic imperfections should be expected. Example: RR would be the passenger rear. Orders placed after 2:00 pm CST cannot be guaranteed shipping that day.

specifications carlockiio:

• for models: Cls550
• for makes: Mercedes
• conditions options: Lr
• genuine oem: Yes
• ipn: 643.mb1h14
• make: Mercedes-benz
• descriptionpartcondition: 2014 Mercedes Cls550 Oem Rear Left Door Lock Actuator
• manufacturer warranty: 90 Day
• placement on vehicle: Left, Rear
• type: Door Lock
• partout id: A-128619627

offer carlockiio:

• availability: In Stock
• options: Ship-to-home
• best offers: True
• quantity: 1
• started: May 18, 2026
• sold: 0

payments carlockiio:

• credit card: Visa
• wallet: Google-pay
• other

shipping carlockiio:

• cost: $15.00
• transit: 3-9 Days
• class: Standard
• type: Fixed
• service: Standard

returns carlockiio:

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

general carlockiio:

• Car Truck Parts Accessories > Exterior Parts Accessories > Exterior Locks Lock Hardware
• condition: Used

seller carlockiio:

• rating: 99.7%
• city: Mobile, Alabama
• # reviews: 63568

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