GENUINE DOOR LOCK VACUUM ACTUATOR 68KFSP

( Brand: Genuine Door Lock Vacuum Actuator ), ( Manufacturer Part Number: 68KFSP ), ( Part Type: Vacuum ), ( Compatible Make/model: Mercedes 240d ), ( Compatible Years: 1982 1983 1981 1977 1978 1979 1980 82 83 81 77 78 79 80 ), ( Fitment Info: Door Lock Vacuum Actuator From Chassis 254516 ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review GENUINE DOOR LOCK VACUUM ACTUATOR Mercedes fits 240D 1977–1983

The **Mercedes-Benz 68KFSP door lock vacuum actuator** from the **W123 240D (1977 1983)** era is a precision-engineered component designed to seamlessly integrate with the vehicle s hydraulic door lock system, ensuring smooth and reliable operation of the power locks. This actuator is a critical part of the **vacuum-operated locking mechanism**, which was standard on many Mercedes-Benz models during this period, offering a quiet, efficient alternative to traditional electric actuators. Crafted from durable materials, including high-grade metal and reinforced rubber seals, the 68KFSP is built to withstand the demands of daily use while maintaining long-term functionality. Its compact yet robust design allows it to fit snugly within the door panel, where it connects to the door lock linkage via a flexible cable or rod, translating vacuum pressure into mechanical motion to lock and unlock the door with minimal effort. The actuator operates by drawing vacuum from the engine bay s intake manifold or a dedicated vacuum source, creating a differential pressure that moves the internal piston, which in turn actuates the door lock mechanism. This system was favored for its simplicity and reliability, though it does require a steady supply of vacuum pressure to function correctly any leaks or failures in the vacuum line can result in erratic or complete lock failure. For restoration or replacement purposes, this actuator is an essential OEM part, ensuring an authentic fit and feel that matches the original equipment specifications. Whether restoring a classic Mercedes-Benz or addressing a malfunction in an existing system, the **68KFSP vacuum actuator** remains a dependable choice for enthusiasts and mechanics seeking both performance and historical accuracy.

### **Pros and Cons of Buying a Door Lock Vacuum Actuator (68KFSP) for a Mercedes 240D (1977 1983)**

1. **Direct Compatibility** The 68KFSP actuator is a known replacement part for the Mercedes-Benz 240D (W123) from 1977 to 1983, ensuring a proper fit without modification.

2. **Reliability** Vacuum actuators are durable if maintained, and this specific part is widely used, meaning it has been tested over time.

3. **Ease of Installation** Many mechanics and DIYers find these actuators straightforward to install, especially if the wiring and mounting points are intact.

4. **Cost-Effective Alternative** Replacing a faulty actuator is often cheaper than overhauling the entire door lock mechanism or buying a used door assembly.

5. **Prevents Further Damage** A failing actuator can lead to door lock malfunctions, which may worsen over time if ignored. Replacing it early avoids more extensive repairs.

6. **Widely Available** Since this is a common part for older Mercedes, finding replacements is easier than for rare or discontinued components.

7. **Standardized Design** The vacuum actuator operates on a simple principle (vacuum pressure to engage the lock), making troubleshooting easier if issues arise.

1. **Vacuum System Dependency** The actuator relies on a functional vacuum source (often from the engine s intake manifold). If the vacuum line is damaged or the engine s vacuum system fails, the actuator won t work, requiring additional diagnostics.

2. **Potential for Leaks** Over time, vacuum hoses or seals can degrade, leading to air leaks that weaken the actuator s performance. This may require periodic inspection.

3. **Wiring Issues** If the wiring harness or connectors are corroded or damaged, the actuator may not receive proper power or signals, necessitating additional repairs.

4. **Limited Lifespan** While durable, vacuum actuators can wear out, especially if exposed to moisture or extreme temperatures. Replacement may still be needed after several years.

5. **DIY Difficulty** If you re not experienced with electrical or mechanical work, installing the actuator could be challenging, especially if the door panel needs removal.

6. **Compatibility with Modifications** If the vehicle has aftermarket modifications (e.g., turbocharged engines, altered vacuum systems), the actuator may not function as intended.

7. **Used vs. New Trade-Off** While new actuators are reliable, used ones may have hidden damage (e.g., cracked seals, corroded terminals), potentially leading to premature failure.

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### **Conclusion**

The **68KFSP door lock vacuum actuator** is a **practical and cost-effective solution** for restoring proper door lock function in a Mercedes 240D (1977 1983), provided the rest of the system (vacuum lines, wiring, and door mechanism) is in good condition. It is a **common, well-supported part** with a straightforward installation process, making it a **recommended choice** for most owners facing lock actuator failure.

- The vehicle s vacuum system is unreliable or modified.

- The wiring or door panel is damaged, requiring additional repairs.

- You lack mechanical/electrical experience, as improper installation could worsen the issue.

- **Buy a new or high-quality used actuator** from a trusted supplier (e.g., eBay, specialized auto parts stores, or Mercedes-Benz dealers).

- **Inspect the vacuum lines and wiring** before installation to ensure they are intact.

- **Test the actuator** after installation to confirm proper function.

- **Consider professional installation** if unsure about handling the wiring or door panel removal.

For most owners, **replacing the actuator is the most efficient fix** it s a **simple, proven solution** that avoids the higher cost and complexity of full door assembly replacement.

Details:

Years: Vehicle: Position: Rear Right, 1977 1983 Mercedes 240D. Years: Vehicle: Position: Front Right, 1977 1983 Mercedes 240D. Genuine Door Lock Actuator fits Mercedes 240D 1977 1983 68KFSP: Brand: condition: New Notes: Vacuum from chassis # 254516, Detailed Applications Years: Vehicle: Position: Rear Left, 1977 1983 Mercedes.

part #: 68kfsp price

• $164.86

specifications carlockiio:

• for makes: Mercedes
• for years: 1977-1983
• brand: Genuine Door Lock Vacuum Actuator
• mpn: 68kfsp
• part type: Vacuum
• compatible make/model: Mercedes 240d
• compatible years: 1982 1983 1981 1977 1978 1979 1980 82 83 81 77 78 79 80
• fitment info: Door Lock Vacuum Actuator From Chassis 254516
• manufacturer warranty: 12 Month Warranty
• attention: Read Full Description To Confirm Fitment
• cs-sku: 400

seller carLockiio:

• city: Westport, Massachusetts
• rating: 99.1%
• # reviews: 23732

offer carLockiio:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• sold: 0
• started: April 3, 2026

general carLockiio:

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

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shipping carLockiio:

• type: Fixed
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