MERCEDES 0025452214 Accelerator Kick Down Switch Benz V10
fits model: R129, Sl500. make: Mercedes. year: 1990–2002.
( Manufacturer Part Number: 0025452214 ), ( Part Type: Switch Down ), ( Country Of Origin: Germany ), ( Manufacturer Warranty: 1 Month )
Review MERCEDES benz Accelerator Kick Down Switch Oem V10 fits R129 SL500 1990–2002
The **Mercedes-Benz 0025452214 Accelerator Kick-Down Switch (V10, R129 SL500, 90-02)** is a precision-engineered component designed exclusively for the iconic **Mercedes-Benz SL500 (W129) models produced between 1990 and 2002**, featuring the legendary **5.0-liter V10 engine**. This high-performance switch is a critical part of the vehicle s throttle control system, enabling the driver to engage the **kick-down function**, which temporarily boosts engine power for aggressive acceleration ideal for spirited driving or overtaking maneuvers. Crafted from durable, corrosion-resistant materials, the switch is built to withstand the rigorous demands of high-performance driving while maintaining seamless operation over the long term. Its robust construction ensures reliable performance, even under the stress of frequent throttle inputs, making it a vital upgrade or replacement for owners seeking to restore or enhance their SL500 s original driving dynamics. The **0025452214** designation confirms its exact compatibility with the **R129 chassis**, ensuring a perfect fit with the vehicle s electrical and mechanical systems. Whether used in a restoration project or as a proactive maintenance measure, this switch exemplifies Mercedes-Benz engineering blending precision, durability, and performance to deliver the refined yet exhilarating driving experience the SL500 is renowned for.
### **Pros and Cons of Buying a Mercedes-Benz R129 SL500 (1990 2002) with a Faulty Accelerator Kick-Down Switch (V10 Engine)**
#### **Pros**
1. **Luxury and Prestige**
The R129 SL500 is an iconic Mercedes-Benz sports car, known for its sleek design, premium interior, and strong brand reputation. Owning one carries a sense of prestige and exclusivity, especially among classic car enthusiasts.
2. **V12 Engine Performance**
The 5.0L V12 engine (M117) produces **306 hp (SAE gross)** and **333 lb-ft of torque**, delivering smooth, linear power and a thrilling driving experience. The V12 s smoothness and high-revving nature make it a joy to drive, particularly on open roads.
3. **Classic Mercedes Reliability (With Proper Maintenance)**
Early R129 models (1990 1995) were generally well-built, and with regular maintenance, many last well beyond 200,000 miles. The V12 is robust if kept in good condition, though later models (post-1997) had some refinements.
4. **Strong Aftermarket Support**
The R129 has a dedicated fanbase, meaning parts (especially for the V12) are widely available. Tuning options (e.g., cold air intakes, exhaust upgrades) can enhance performance and sound.
5. **Classic Car Investment Potential**
Well-preserved R129 SL500s, especially in lower mileage or restored condition, appreciate in value over time. A properly maintained example can be a sound long-term investment.
6. **Convertible Top Mechanism (If Intact)**
The manual soft top is a standout feature, offering the thrill of driving with the top down. If the mechanism is in good condition, it adds significant enjoyment.
7. **Comfort and Ride Quality**
The SL500 s suspension and ride are refined for both sportiness and comfort, making it suitable for daily driving (if maintained properly).
---
#### **Cons**
1. **Faulty Accelerator Kick-Down Switch**
The kick-down switch (used for full throttle in overdrive) is a known weak point in the R129. If it fails, the car may not engage full power in certain gears, leading to poor acceleration. Replacement switches are available but require some mechanical knowledge to install.
2. **High Maintenance Costs**
- **V12 Engine:** While robust, the V12 requires regular oil changes (high-quality synthetic oil), valve adjustments (every 30,000 50,000 miles), and potential timing chain/valvetronic issues.
- **Electrical System:** Early R129s had some electrical quirks (e.g., faulty sensors, wiring issues), which can be costly to diagnose and repair.
- **Transmission:** The 7G-T automatic (or 722.6 in later models) can develop leaks or shift roughly over time, requiring fluid changes and potential rebuilds.
3. **Common Wear Items**
- **Brakes:** The SL500 s weight (3,200 3,500 lbs) means heavy brake pads and rotors wear out quickly, especially if driven aggressively.
- **Suspension:** Bushings, shocks, and struts degrade over time, requiring frequent replacements.
- **Soft Top:** If not properly maintained, the convertible top can develop leaks, sagging, or mechanical failures.
4. **Fuel Economy**
The V12 is thirsty, averaging **12 15 MPG highway** and **10 12 MPG city**. High fuel costs can add up, especially if the car is driven often.
5. **Depreciation and Insurance**
- Classic cars depreciate, but the R129 holds value better than most. However, insurance for a high-performance luxury car can be expensive, especially for younger or inexperienced drivers.
- Theft risk is higher than average due to its desirability.
6. **Driving Challenges**
- **Weight:** The SL500 is heavy, making it less nimble than lighter sports cars.
- **Aging Technology:** Early models lack modern safety features (no ABS until 1995, no stability control), which can be a concern for modern drivers.
- **Parking and Maneuverability:** The long wheelbase and convertible top make parking and tight-space driving difficult.
7. **Potential Hidden Issues**
- **Water Pump:** The V12 s water pump can fail, leading to overheating.
- **Valvetronic Actuators:** Electronic throttle control issues may require recalibration.
- **Rust:** Some early models (especially in snowy climates) suffer from rust in wheel wells and undercarriage.
---
### **Conclusion**
The **Mercedes-Benz R129 SL500 (V12) is a fantastic classic car** for enthusiasts who appreciate luxury, power, and driving pleasure but it comes with **significant maintenance demands and potential reliability concerns**, particularly with the accelerator kick-down switch and aging mechanical/electrical components.
If you **prioritize driving enjoyment, prestige, and are willing to invest time/money in maintenance**, this car can be an incredible ownership experience. However, if you **seek a low-maintenance, modern luxury vehicle**, it may not be the best choice.
### **Recommendation**
- **Buy Only If:**- You have **mechanical experience** or access to a trusted mechanic.
- You are prepared for **regular maintenance** (oil changes, valve adjustments, brake work, etc.).
- The car has a **clean service history** and **no major structural/rust issues**.
- You **enjoy classic cars** and don t mind occasional repairs as part of the ownership experience.
- You **test-drive thoroughly** and inspect the kick-down switch, transmission, and suspension before purchasing.
- **Avoid If:**- You want a **plug-and-play, low-maintenance** luxury car.
- You **cannot afford unexpected repairs** (budget **$3,000 $6,000/year** for maintenance).
- You **don t have a garage** (rust and weather exposure accelerate deterioration).
- You **prioritize fuel efficiency** over performance.
**Final Verdict:** The R129 SL500 is a **fantastic project car for dedicated Mercedes enthusiasts**, but it is **not a beginner-friendly purchase**. If you re serious about owning one, **inspect it meticulously, get a pre-purchase inspection, and be ready for the long-term commitment**. For those who love the V12 s roar and the SL s elegance, the rewards far outweigh the challenges but only if you re prepared for them.
Details:
This part is essential for controlling the accelerator pedal in car, ensuring smooth and responsive acceleration. Made by Mercedes-Benz, a trusted and reputable brand, this switch is designed to meet the highest standards of quality performance. It comes with a 1-month manufacturer warranty and has the part number. The product is an OEM accelerator kick down switch for a Mercedes-Benz R129 SL5 manufactured in Germany.
part #: 0025452214 prices
- $10.00-$150.00
specifications pedalspadsaz:
- for models: R129, Sl500
- for makes: Mercedes
- for years: 1990-2002
- mpn: 0025452214
- part type: Switch Down
- country of origin: Germany
- manufacturer warranty: 1 Month
general pedalspadsaz:
- Car Truck Parts Accessories > Interior Parts Accessories > Pedal Assemblies, Pads Parts
- condition: Used
seller pedalspadsaz:
- # reviews: 1943
- city: Clearwater, Florida
- rating: 100.0%
payments pedalspadsaz:
- wallet: Google-pay
- credit card: Diners-club
- other
shipping pedalspadsaz:
- service: Standard
- class: Standard
- cost: $0.00
- type: Fixed
- transit: 5-10 Days
offer pedalspadsaz:
- options: Ship-to-home
- best offers: True
- availability: In Stock
- quantity: 2
- sold: 0
- started: February 15, 2026
returns pedalspadsaz:
- time: 30 Days
- policy: Returns Accepted
- paid by: Seller
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