MERCEDES Accelerator Pedal 234.MB1U77 Benz
fits model: 450sl, R107. make: Mercedes. year: 1973–1980.
( Manufacturer Part Number: 450SL ), ( Conditions Options: A, Accel Pedal ), ( Genuine Oem: Yes ), ( Ipn: 234.mb1u77 ), ( Make: Mercedes-benz ), ( Year: 1977 ), ( Manufacturer Warranty: 60 Day ), ( Items Included: Pedals ), ( Type: Accelerator Pedal )
Review MERCEDES benz Accelerator Pedal fits 450SL R107 1973–1980
The **Mercedes-Benz 450SL (W116/R107) Accelerator Pedal** from the **234.MB1U77** era spanning the model years **1973 through 1980** represents a critical yet often overlooked component of one of the most iconic and enduring sports cars in automotive history. This pedal, integral to the **R107 450SL**, the final iteration of the legendary SL roadster before the transition to the W124 generation, embodies the seamless blend of German engineering precision and the unmistakable driving character that defined Mercedes-Benz s luxury sports heritage. Crafted for the **M117 6.3L V8 engine**, one of the most powerful and refined air-cooled Mercedes-Benz powerplants of its time, this accelerator pedal was designed to deliver effortless, linear throttle response while maintaining the structural integrity and durability demanded by high-performance driving. The **1973 1980 R107 450SL** was a masterpiece of automotive design, featuring a lightweight aluminum body, a rear-engine layout, and a suspension tuned for both comfort and sportiness, making this pedal a vital link between driver intent and the engine s exhilarating 286 306 horsepower output, depending on the year and tuning. Whether paired with the **4.5L M116** or the **6.3L M117**, this pedal ensures smooth, progressive acceleration, allowing the driver to modulate power with the same finesse as the car s legendary road-holding capabilities. For collectors and enthusiasts, restoring or replacing an original **234.MB1U77 accelerator pedal** is not just a mechanical necessity but a nod to the craftsmanship and attention to detail that made the R107 450SL a timeless classic. Whether sourced from a meticulously preserved showroom-quality example or a carefully restored project car, this pedal is a testament to Mercedes-Benz s commitment to performance, elegance, and enduring engineering excellence.
### Pros and Cons of Buying a Mercedes-Benz 450SL (R107, 1973 1980) with a Focus on the Accelerator Pedal
The Mercedes-Benz 450SL (R107) is a classic grand tourer known for its luxury, performance, and timeless design. However, like any vintage vehicle especially one from this era it comes with distinct advantages and challenges, particularly regarding mechanical components such as the accelerator pedal system. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.
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### **Pros of Owning a 450SL (R107)**
1. **Luxury and Comfort**
The R107 is renowned for its opulent interior, featuring high-quality materials, hand-stitched leather, and refined craftsmanship. The ride is smooth and quiet, making it ideal for long-distance cruising. The convertible top, while not as reliable as modern systems, adds to the car s charm when functioning properly.
2. **Performance and Power**
The 450SL is powered by a 6.9L (450 cubic inch) inline-six engine (M117) producing around 250 270 horsepower, depending on the year and modifications. This engine is robust, torquey, and capable of handling high speeds with ease. The car accelerates well for its size and era, and the manual transmission (or optional automatic) offers engaging driving dynamics.
3. **Reliability of the Core Engine and Chassis**
The M117 engine is one of the most reliable Mercedes-Benz inline-sixes, known for its durability if properly maintained. Many examples with low mileage (under 50,000 miles) can run indefinitely with basic upkeep. The chassis is sturdy, and the suspension is well-tuned for a balance of comfort and handling.
4. **Classic Status and Collectibility**
The R107 is highly sought-after among classic car enthusiasts, particularly the later models (1977 1980), which feature minor refinements like revised bumpers and improved interior materials. Well-preserved examples appreciate in value, especially those with originality or rare options (e.g., wood trim, special paint schemes).
5. **Driving Experience**
The car handles well for its weight, with precise steering and a stable ride. The convertible top, when in good condition, enhances the open-air driving experience. The manual transmission (if fitted) provides a satisfying connection between driver and engine.
6. **Aftermarket Support**
There is a strong aftermarket community for the R107, offering parts, restoration services, and performance upgrades. Engines, transmissions, and even complete cars are available for purchase, making repairs and modifications more accessible than for rarer classics.
7. **Versatility**
The 450SL can serve as both a daily driver (with some compromises) and a weekend cruiser or show car. Its size (19 feet long) makes it comfortable for longer trips, though parking and maneuverability in tight spaces can be challenging.
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### **Cons of Owning a 450SL (R107)**
1. **Accelerator Pedal Issues (Primary Concern)**
The most significant drawback of the R107, particularly in older examples, is the **accelerator pedal system**. This car uses a **cable-operated accelerator**, which is prone to wear, fraying, and failure over time. Common problems include:
- **Sticking or erratic throttle response**: The cable can bind, causing the engine to rev unevenly or stall.
- **Pedal play or detachment**: The pedal itself may become loose or detach from the cable, leading to loss of throttle control.
- **Rust and corrosion**: Older cables can corrode, especially if the car has been stored in damp conditions.
- **Difficulty in adjusting**: Unlike modern cars, the throttle cable cannot be easily adjusted from the driver s seat; it often requires removal of the dash or floor mats.
**Fixes**: Replacing the throttle cable is relatively straightforward but requires disassembly. Some owners opt for an **electronic throttle control (ETC) conversion**, which replaces the cable with a modern electronic system. This is a significant modification but addresses the issue permanently and improves reliability.
2. **Convertible Top Problems**
The soft-top mechanism is notorious for wear, particularly in older cars. Common issues include:- **Stiff or sagging fabric**: The vinyl can crack or stretch over time.
- **Failing springs or cables**: The top may not retract smoothly or at all.
- **Water leaks**: Even with a new top, seals can degrade, leading to interior dampness.
Replacing the top is expensive (typically $3,000 $6,000 for a quality aftermarket top) and labor-intensive.
3. **Electrical System Reliability**
The R107 s electrical system is outdated by modern standards and can be finicky. Issues often include:- **Faulty wiring**: Corrosion or broken connections can cause intermittent problems (e.g., lights, gauges, or accessories failing randomly).
- **Alternator wear**: The alternator may struggle to keep the battery charged, especially if the car is driven infrequently.
- **Ignition switch failures**: The switch can wear out, requiring replacement (a common and costly repair).
Regular electrical diagnostics and maintenance are essential.
4. **Fuel System Challenges**
The carbureted engine (later models switched to fuel injection in 1977) can develop issues such as:- **Dirty or leaking carburetors**: Requires periodic cleaning or replacement.
- **Fuel pump failures**: The mechanical pump can fail, causing stalling or difficulty starting.
- **Vapor lock**: In hot climates, the fuel system may struggle to deliver fuel consistently.
5. **Maintenance and Repair Costs**
While parts are available, labor costs can be high due to the car s complexity and the need for specialized mechanics. Common repairs include:- **Suspension components**: Bushings, shocks, and struts wear out over time.
- **Brakes**: Drum brakes (on early models) or disc brakes (later models) require frequent attention.
- **Exhaust system**: Rust and leaks are common, especially on the underside.
- **Transmission**: The automatic transmission (if equipped) can be finicky and may require fluid changes and adjustments.
6. **Size and Practicality**
The R107 is large (19 feet long) and heavy, making it impractical for:- **Urban driving**: Parking, tight turns, and narrow roads can be challenging.
- **Fuel efficiency**: The engine is thirsty, consuming around 15 20 MPG in mixed driving (worse in stop-and-go traffic).
- **Modern infrastructure**: Some garages or parking structures may not accommodate the car s length.
7. **Environmental and Legal Considerations**
- **Emissions**: Older models may not meet modern emissions standards, limiting where they can be driven in some regions.
- **Insurance**: Classic car insurance is available but can be expensive, especially for high-value or restored examples.
- **Roadworthiness**: In some countries, annual inspections may flag the car for modifications (e.g., ETC conversion) or wear items (e.g., brakes, lights).
8. **Finding a Reliable Example**
Many R107s have been poorly maintained or restored with subpar parts. Buyers must carefully inspect:- **Engine condition**: Look for signs of oil leaks, compression, and valve train wear.
- **Body rust**: The floor pans, rocker panels, and rear quarter panels are common rust spots.
- **Documentation**: A service history is invaluable; without it, hidden problems may lurk.
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### **Conclusion**
The Mercedes-Benz 450SL (R107) is a magnificent classic car that offers a blend of luxury, performance, and timeless appeal. Its inline-six engine, comfortable ride, and elegant design make it a joy to own for enthusiasts who appreciate vintage automobiles. However, the **accelerator pedal system** is a critical weak point that can turn ownership into a frustrating experience if not addressed. Other challenges, such as the convertible top, electrical issues, and maintenance costs, further complicate ownership.
For the right buyer someone who is prepared for mechanical challenges, willing to invest in repairs or modifications (like an ETC conversion), and who values the car s character over convenience the R107 can be an incredibly rewarding project. It is best suited for:
- Enthusiasts who enjoy restoring and maintaining classic cars.
- Those who prioritize driving experience and luxury over practicality.
- Owners who can store the car in a dry, secure location and drive it regularly to prevent deterioration.
If the accelerator pedal issue is not resolved (either via cable replacement or ETC conversion), the car s reliability will be compromised, making it less enjoyable to own. Similarly, neglecting the convertible top or other wear items will lead to higher long-term costs.
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### **Recommendation**
1. **If You Are Serious About Buying:**- **Prioritize the accelerator pedal**: Ensure the throttle cable is in good condition or budget for an ETC conversion. This is the most critical repair to make the car driveable and enjoyable.
- **Inspect the convertible top**: If the top is failing, factor in the cost of a new one (or consider
Details:
specifications pedalspadsaz:
- for models: 450sl, R107
- for makes: Mercedes
- for years: 1973-1980
- mpn: 450sl
- conditions options: A, Accel Pedal
- genuine oem: Yes
- ipn: 234.mb1u77
- make: Mercedes-benz
- year: 1977
- manufacturer warranty: 60 Day
- items included: Pedals
- type: Accelerator Pedal
payments pedalspadsaz:
- other
- credit card: Discover
- wallet: Apple-pay
shipping pedalspadsaz:
- transit: 3-7 Days
- service: Standard
- class: Standard
- type: Fixed
- cost: $20.00
seller pedalspadsaz:
- # reviews: 20349
- rating: 99.3%
- city: Rancho Cordova, California
returns pedalspadsaz:
- paid by: Buyer
- policy: Returns Accepted
- time: 60 Days
general pedalspadsaz:
- condition: Used
- Car Truck Parts Accessories > Interior Parts Accessories > Pedal Assemblies, Pads Parts
offer pedalspadsaz:
- options: Ship-to-home
- quantity: 1
- sold: 0
- availability: In Stock
- started: March 2, 2026
- best offers: True
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