1. Lock Hardware Deals
  2. sku: 31848413977912773
  3. MERCEDES C300

MERCEDES Rh Rear Door Lock Actuator Wrnty 643.MB1B18 Benz 1YR

fits model: C300. make: Mercedes. year: 2018.

643.mb1b18 Mercedes-benz Rh Rear Door Lock Actuator Oem 2018 C300 1yr Wrnty

( Part Type: Actuator Door Lock ), ( Conditions Options: Rh Rear Door Lock Actuator ), ( Genuine Oem: Yes ), ( Ipn: 643.mb1b18 ), ( Make: Mercedes-benz ), ( Manufacturer Warranty: 1 Year ), ( Partout Id: A-119855433 )

Review MERCEDES benz Rh Rear Door Lock Actuator Oem 1yr Wrnty fits C300 2018

The **Mercedes-Benz 643.MB1B18 RH Rear Door Lock Actuator** is a precision-engineered component designed exclusively for the **2018 Mercedes-Benz C300 (C205 chassis)**, ensuring seamless integration with the vehicle s advanced electrical and mechanical systems. This high-performance actuator is a critical part of the rear door locking mechanism, delivering smooth, reliable operation while maintaining the iconic Mercedes-Benz standard of durability and refinement. Crafted from robust, corrosion-resistant materials, the actuator is built to withstand the demands of daily driving, from urban commutes to highway travel, without compromising on performance. Its compact yet sturdy design allows for effortless installation, fitting perfectly within the confined space of the rear door panel, while its optimized motor and gearing system ensures quiet, precise locking and unlocking with minimal wear over time. The actuator is fully compatible with the **2018 C300 s keyless entry system**, central locking, and remote control functions, providing a seamless user experience that aligns with the vehicle s premium features. Backed by a **one-year warranty**, this genuine Mercedes-Benz part guarantees long-term reliability, reducing the risk of premature failure and ensuring that your vehicle maintains its intended functionality and safety standards. Whether replacing a worn-out actuator or upgrading for enhanced performance, this component is an essential investment for preserving the integrity of your Mercedes-Benz s sophisticated door locking system.

**Pros and Cons of purchasing a Mercedes-Benz 643.MB1B18 Rear Door Lock Actuator (2018 C300, 1-Year Warranty)**

### **Pros:**

1. **Direct Compatibility** The part is specifically listed for the 2018 Mercedes-Benz C300, ensuring it fits without modification. This reduces the risk of incorrect installation and potential damage to the vehicle s electrical or mechanical systems.

2. **Warranty Coverage** The inclusion of a 1-year warranty provides some protection against manufacturing defects or premature failure. This can offer peace of mind, especially if the part is new or sourced from a reputable supplier.

3. **Potential Cost Savings** Purchasing directly (rather than through a dealership) may be cheaper than OEM parts or labor costs at an authorized service center. This can be particularly advantageous if the owner is comfortable with DIY repairs or has access to a trusted mechanic.

4. **Availability and Convenience** If the part is readily available from the seller (e.g., an online marketplace, specialty auto parts store, or aftermarket supplier), it avoids long wait times for OEM replacements, which can sometimes take weeks or months.

5. **Preventative Maintenance** Replacing a faulty or worn-out rear door lock actuator before it fails entirely can prevent inconvenience (e.g., stuck doors) and potential secondary damage (e.g., wiring issues from repeated failure).

---

### **Cons:**

1. **Quality Concerns with Aftermarket Parts** While the part may be compatible, it could be a non-OEM (aftermarket) replacement. Aftermarket actuators may lack the durability, precision, or long-term reliability of genuine Mercedes-Benz components, leading to earlier failure or inconsistent performance.

2. **Installation Complexity** The rear door lock actuator is part of the vehicle s electrical and mechanical door-locking system. Improper installation such as incorrect wiring, misalignment, or failure to reset the door lock control module can result in the door not locking/unlocking properly, requiring additional troubleshooting or even a return visit to the mechanic.

3. **Warranty Limitations** The 1-year warranty may not cover labor costs or indirect issues (e.g., if the actuator fails due to a pre-existing problem not related to manufacturing). Some sellers warranties also exclude damage from improper installation or misuse.

4. **Potential for Counterfeit Parts** If the part is purchased from an unverified seller, there is a risk of receiving a counterfeit or substandard replica. Counterfeit parts may not meet Mercedes-Benz s engineering standards, leading to poor performance or safety hazards.

5. **No Long-Term Support** Unlike OEM parts, aftermarket replacements may not have the same level of technical support or access to updated firmware/software if the actuator requires calibration or programming (some modern Mercedes actuators do).

6. **Resale Impact** If the vehicle is later sold, a non-OEM actuator might raise questions about maintenance history or quality, potentially affecting its resale value or perceived condition.

---

### **Conclusion:**

Buying the **Mercedes-Benz 643.MB1B18 rear door lock actuator (2018 C300) with a 1-year warranty** can be a practical and cost-effective solution if the part is sourced from a trusted supplier (e.g., a well-reviewed aftermarket parts dealer or an authorized Mercedes-Benz parts distributor). It offers direct compatibility, warranty protection, and convenience, which are significant advantages for DIYers or those seeking to avoid dealership markups.

However, the risks particularly related to aftermarket quality, installation challenges, and long-term reliability must be carefully considered. If budget allows, opting for an **OEM or high-quality aftermarket part (e.g., from a brand like ACDelco, Dorman, or a Mercedes-Benz-approved supplier)** may justify the higher cost for greater confidence in durability. Additionally, ensuring professional installation (or thorough DIY research) is critical to avoid creating new problems.

**Recommendation:**

- **If cost is the priority and the seller is reputable (e.g., has positive reviews, clear return policies, and verifiable sourcing),** proceed with the purchase, but verify the part s authenticity and compatibility before buying.

- **If reliability and long-term performance are concerns,** prioritize an OEM or premium aftermarket part, even if it means paying more. Consider having a mechanic inspect the installation to reset the door lock control module and ensure proper function.

- **For DIY installation,** follow Mercedes-Benz service manuals or trusted online guides (e.g., from Haynes or Chilton) to avoid common pitfalls. Test the actuator thoroughly after installation to confirm it operates smoothly in all modes (manual, keyless, remote).

- **Always back up the vehicle s door lock control module settings** (if possible) before replacement, as some actuators require reprogramming to sync with the car s system.

Ultimately, the decision depends on balancing immediate needs (e.g., fixing a malfunction) with long-term considerations (e.g., part quality and ease of repair). When in doubt, consulting a Mercedes-Benz specialist or dealership for guidance on the part s suitability is advisable.

Details:

Warranty HASSLE-FREE 1 YEAR WARRANTY: All parts are warrantied for a period of 12 months or year from the purchase date. Free shipping only applies to items you keep. Image shown may be the vehicle from which part was pulled, or a generic image representing typical stock, rather than unique item being sold. Easy to find parts that don't require a mechanics knowledge.

Quality, Assured Parts All are Quality Tested Inspected. Very happy customer, excellent value and service. Shipping Damage:: Damages and evidence of tampering on the outer packaging must be noted delivery receipt by driver. C300 2018 Lock Actuator 10720465: RH REAR DOOR LOCK ACTUATOR Included: Hassle-free 1 Year Warranty Our Part #: 10720465.

If something is wrong with an order, we certainly do want to help you. Please compare part numbers BEFORE purchasing. Please disregard other fitment charts they may not be correct. More Parts: 1 Year Warranty.

specifications carlockiio:

  • for models: C300
  • for makes: Mercedes
  • for years: 2018
  • part type: Actuator Door Lock
  • conditions options: Rh Rear Door Lock Actuator
  • genuine oem: Yes
  • ipn: 643.mb1b18
  • make: Mercedes-benz
  • manufacturer warranty: 1 Year
  • partout id: A-119855433

returns carlockiio:

  • paid by: Buyer
  • policy: Returns Accepted
  • time: 60 Days

general carlockiio:

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

shipping carlockiio:

  • cost: $20.00
  • type: Fixed
  • class: Freight
  • service: Flat Rate Freight

offer carlockiio:

  • best offers: True
  • availability: In Stock
  • options: Ship-to-home
  • started: May 29, 2026
  • quantity: 1
  • sold: 0

seller carlockiio:

  • city: Rancho Cordova, California
  • rating: 97.4%
  • # reviews: 23663

payments carlockiio:

  • other
  • credit card: Discover
  • wallet: Paypal
for models: c300, for makes: mercedes, for years: 2018, part type: actuator door lock, conditions options: rh rear door lock actuator, genuine oem: yes, manufacturer warranty: 1 year, partout id: a-119855433,
manufacturer: mercedes-benz, category: auto parts > car truck parts accessories > exterior parts accessories > exterior locks lock hardware, sku: 31848413977912773,
Mercedes C300 Is Similar To:
carlockiio logo
5 offers $125.00–$125.00 USD
  • Used. Offer #1 priced at $125.00 + $20.00 shipping estimate = $145.00* total. *OPEN FOR IMPORTANT FITMENT INFO*.+$20.00 shipping
  • Used. Offer #2 priced at $125.00 + $20.00 shipping estimate = $145.00* total. +$20.00 shipping
  • Used. Offer #3 priced at $125.00 + $20.00 shipping estimate = $145.00* total. +$20.00 shipping
  • Used. Offer #4 priced at $125.00 + $20.00 shipping estimate = $145.00* total. +$20.00 shipping
  • Used. Offer #5 priced at $125.00 + $20.00 shipping estimate = $145.00* total. +$20.00 shipping

Copyright © carlockiio.com