MERCEDES A-221-720-15-35 Rear Left Driver Door Lock Wire Benz

( Manufacturer Part Number: A-221-720-15-35 ), ( Part Type: Wire Driver Door Lock ), ( Placement On Vehicle: Front, Left ), ( Manufacturer Warranty: 1 Month )

Review MERCEDES benz Rear Left Driver Door Lock Wire Oem fits W221 S550 S450 2007–2013

The **Mercedes-Benz 2217201535 (07-13 W221 S550/S450 Rear Left Driver Door Lock Wire)** is a precision-engineered electrical component designed exclusively for the luxury W221 generation of Mercedes-Benz S-Class sedans, including the S550 and S450 models produced between the 2007 and 2013 model years. This high-quality door lock wire harness is a critical part of the vehicle s electrical system, ensuring seamless operation of the rear left driver-side door lock mechanism while maintaining the integrity of the original wiring layout. Crafted to meet or exceed OEM specifications, this wire is built with durable, corrosion-resistant materials to withstand the demanding conditions of daily driving, from extreme temperatures to moisture exposure, thereby preventing signal degradation or electrical failures. The harness is meticulously routed to align with the factory wiring diagram, guaranteeing a perfect fit without the need for excessive trimming or modification, which helps preserve the vehicle s aesthetic and structural integrity. Whether replacing a damaged wire due to wear and tear, a failed electrical connection, or an accident-related tear, this component is an essential upgrade for restoring full functionality to the door lock system. Its compatibility with the S-Class advanced keyless entry and push-button start features ensures that the door lock operates smoothly in tandem with the vehicle s sophisticated security and convenience systems. For enthusiasts and owners seeking to maintain or restore their Mercedes-Benz to its original performance standards, this wire is an indispensable part of any repair or maintenance project, offering reliability, longevity, and the uncompromising quality expected from Mercedes-Benz engineering.

### **Analysis of Buying a Mercedes-Benz W221 Rear Left Driver Door Lock Wire (Part Number: 2217201535, Model Years: 2007 2013)**

#### **Pros of Purchasing This Part**

1. **Direct Compatibility**

- The part number **2217201535** is specifically designed for the **Mercedes-Benz W221 S-Class (2007 2013)**, including the **S550 and S450 models**. This ensures a precise fit without modifications, reducing the risk of installation issues.

2. **OEM Quality**

- If sourced from a reputable supplier (e.g., an authorized Mercedes-Benz dealer, Genuine Parts Program, or a trusted aftermarket provider like **Bosch, Dorman, or OE Parts Direct**), this part will meet Mercedes-Benz s original engineering standards. This can improve reliability compared to generic aftermarket alternatives.

3. **Prevents Electrical or Mechanical Failures**

- A faulty door lock actuator or wiring harness can cause **intermittent locking/unlocking, remote key failure, or complete door lock malfunction**. Replacing the wire harness (if the issue is electrical) or the actuator itself (if mechanical) resolves these problems, restoring functionality.

4. **Potential Cost Savings vs. Full Door Replacement**

- If the door lock mechanism itself is still functional but the wiring is damaged (e.g., from corrosion, wear, or a short circuit), replacing just the wire harness is far cheaper than replacing the entire door assembly (which can cost **$800 $2,000 ** in labor and parts).

5. **Easy Installation (For Skilled DIYers)**

- The door lock wire harness is relatively accessible, especially in the **S-Class**, where the doors are designed for serviceability. With basic tools (screwdrivers, wire cutters/strippers, and possibly a multimeter for diagnostics), a mechanically inclined person could install it in **1 3 hours**.

6. **Warranty Coverage (If Purchased from Authorized Sources)**

- Some suppliers offer **limited warranties** (e.g., 1 2 years) on OEM or high-quality aftermarket parts, providing peace of mind against early failure.

7. **Prevents Further Damage**

- Ignoring a failing door lock wire can lead to **corrosion spreading to adjacent wiring**, affecting other electrical components (e.g., window regulators, power seats, or central locking system). Addressing it early mitigates broader issues.

---

#### **Cons of Purchasing This Part**

1. **Potential Counterfeit or Low-Quality Parts**

- The aftermarket for Mercedes-Benz parts is flooded with **counterfeit or substandard replicas**, especially on eBay, Amazon, or unregulated online marketplaces. These parts may:

- Fail prematurely (e.g., brittle wiring, poor soldering).

- Not match the original pinout, causing **electrical issues** (e.g., short circuits, intermittent connections).

- Lack proper Mercedes-Benz certification, voiding warranty claims.

- **Mitigation:** Purchase from **verified suppliers** (e.g., **Mercedes-Benz Parts Store, APDE Parts, or local dealerships**) and check for **authentication stickers or serial numbers**.

2. **Diagnostic Uncertainty**

- If the **symptoms** (e.g., door not locking/unlocking, warning lights, or remote key failure) are not clearly linked to the wire harness, the issue might be elsewhere (e.g., **central locking control module, battery voltage issues, or a faulty actuator motor**). A **professional diagnosis** (via **Mercedes-Benz diagnostic tool like STAR or ISTA**) may be required before purchasing, adding to costs.

3. **Labor Costs if Professional Installation is Needed**

- While DIY installation is possible, **dealer or specialist labor** for the S-Class can range from **$150 $400 per hour**, depending on location. If the technician identifies additional issues (e.g., corroded connectors, a failing actuator), the total repair cost could exceed **$500 $1,200**.

4. **Age of the Vehicle May Affect Longevity**

- **Oxidized terminals** (common in older Mercedes wiring).

- **Cracked or brittle insulation** (from heat or UV exposure).

- **General wear** from repeated flexing.

- Even a new harness may fail sooner if the **underlying electrical system is compromised** (e.g., weak battery, corroded ground connections).

5. **Potential for Additional Hidden Issues**

- **Corroded or damaged connectors** in the door lock system (requiring cleaning or replacement).

- A **failing door lock actuator** (which would need replacement alongside the wire).

- **Software glitches** in the central locking system (requiring a reset or reprogramming).

- These **unexpected costs** could inflate the total repair budget.

6. **Limited Availability of OEM Parts**

- Longer **wait times** for delivery (weeks to months).

- Higher **resale value** for used OEM parts, increasing costs.

- Aftermarket alternatives (e.g., **Bosch, Dorman, or OE Parts Direct**) are usually sufficient but may not have the same longevity.

7. **Risk of Voiding Warranty (If Applicable)**

- If the vehicle is **still under factory warranty**, attempting a DIY repair (or using non-OEM parts) could **void coverage** for electrical issues. Mercedes-Benz warranties often require **dealer service** for electrical repairs.

---

### **Conclusion**

- The **symptoms clearly point to a wiring issue** (e.g., intermittent locking, blown fuses, or visible damage to the harness).

- The **part is sourced from a trusted supplier** to avoid counterfeits.

- The **budget accounts for potential additional repairs** (e.g., actuator replacement, connector cleaning).

- The **installation is either DIY-friendly or handled by a qualified mechanic**.

- The **diagnosis is unclear** and other components (e.g., control module, actuator) might be faulty.

- The **vehicle has extensive electrical corrosion** or a weak battery.

- The **supplier is untrusted**, risking poor-quality parts.

- The **cost exceeds the vehicle s value**, making repair uneconomical.

### **Recommendation**

1. **Verify the Issue First**

- Use a **multimeter** to test for **continuity and voltage** in the door lock wiring.

- Check for **fuse blowouts** (e.g., fuse 12 or 13 in the S-Class fuse box).

- Inspect the **harness for burns, corrosion, or physical damage**.

- If unsure, take the car to a **Mercedes-Benz specialist** for a **diagnostic scan** (ISTA/DAS) to confirm the exact problem.

2. **Purchase from a Reputable Source**

- **Authorized Dealership:** Most reliable but expensive.

- **Mercedes-Benz Parts Store (online):** Guaranteed OEM quality, but may have long lead times.

- **Trusted Aftermarket Supplier:** Brands like **Bosch, Dorman, or OE Parts Direct** offer high-quality alternatives. Avoid **eBay or unknown sellers** unless they have **verified feedback and return policies**.

- **Used OEM Parts:** Cheaper but riskier inspect for **physical damage and test before buying**.

3. **Budget for Potential Additional Repairs**

- If the **actuator is failing**, budget **$200 $500** for its replacement.

- If **connectors are corroded**, plan for **$50 $150** in cleaning or replacement.

- If the **battery is weak**, address it first (a **$100 $300** investment can prevent future electrical issues).

4. **Consider Professional Installation**

- While DIY is possible, the **S-Class wiring can be tricky**, especially if the harness is routed through tight spaces. A **dealer or Mercedes specialist** ensures proper installation and avoids damaging other components.

5. **Evaluate Vehicle Value**

- If the car is **high-mileage (150,000 miles) or in poor condition**, weigh whether the repair is **worth the cost**. For **low-mileage, well-maintained S-Class models**, this is a **necessary and cost-effective fix**.

### **Final Verdict**

- The diagnosis confirms a **wiring harness issue**.

- The **source is reliable** (OEM or high-quality aftermarket).

- The **budget includes contingencies** for related repairs.

- The

Details:

Item may show light scuffs, scratches or other imperfections as a result of this being used part. All electronics are tested before removed from vehicle. All the parts are tested either before or after removal from vehicle. Shipping prices for ground apply only to the continental USA.

specifications carlockiio:

• for models: W221, S550, S450
• for makes: Mercedes
• for years: 2007-2013
• mpn: A-221-720-15-35
• part type: Wire Driver Door Lock
• placement on vehicle: Front, Left
• manufacturer warranty: 1 Month

offer carlockiio:

• options: Ship-to-home
• sold: 0
• best offers: True
• started: February 17, 2026
• availability: In Stock
• quantity: 1

seller carlockiio:

• city: Yuba City, California
• rating: 99.9%
• # reviews: 12455

shipping carlockiio:

• type: Fixed
• service: USPS Priority Mail
• class: Expedited
• carrier: USPS
• cost: $0.00
• transit: 3-7 Days

returns carlockiio:

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

general carlockiio:

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

payments carlockiio:

• credit card: Mastercard
• wallet: Apple-pay
• other
• money order

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