1. Engine Crankshafts Products
  2. sku: 20294425556309751
  3. MERCEDES 1170300506

MERCEDES 1170300506 Crank Harmonic Balancer Balance Disc Benz 72-89

fits model: R107, 450sl. make: Mercedes.

1170300506 Mercedes-benz Crank Harmonic Balancer Balance Disc 72-89 R107 450sl

( Manufacturer Part Number: 1170300506 ), ( Part Type: Crank Balancer ), ( Country Of Origin: Germany )

Review MERCEDES benz Crank Harmonic Balancer Balance Disc 72-89 fits R107 450SL

The **Mercedes-Benz 1170300506 Crank Harmonic Balancer Balance Disc** is a precision-engineered component designed exclusively for the iconic **R107 450SL (1972 1989)** model, serving as a critical element in maintaining the smooth operation and structural integrity of the engine s crankshaft assembly. This high-performance balance disc, often referred to as a harmonic balancer, is crafted from durable cast iron and features a robust, machined surface that ensures optimal vibration dampening, reducing engine noise and preventing excessive stress on the crankshaft and connected components. The disc is meticulously balanced during manufacturing to eliminate any residual imbalances, which is essential for preserving the longevity of the engine and enhancing driving comfort. Its robust construction includes a central mounting hub with a precision-bored hole, designed to fit seamlessly onto the crankshaft s splined end, while the outer rim is reinforced to withstand the dynamic forces generated during high-performance operation. This component is particularly vital for the **450SL s legendary AMG-developed M116 6.9-liter V8 engine**, which, despite its raw power, relies on this balancer to mitigate torsional vibrations and ensure smooth power delivery. Whether installed in a classic restoration project or as part of a thorough engine rebuild, this **OEM-quality harmonic balancer** is a must-have for maintaining the performance and reliability of one of Mercedes-Benz s most legendary roadsters. Its compatibility with the **R107 chassis** a model celebrated for its timeless design and engineering makes it an indispensable part of preserving the integrity of this automotive masterpiece.

### **Pros and Cons of buying a Mercedes-Benz 1170300506 Crank Harmonic Balancer (Balance Disc) for a 72-89 R107 450SL**

#### **Pros:**

1. **Authentic OEM Quality** This is a genuine Mercedes-Benz part, ensuring proper fitment, durability, and compatibility with your engine. Aftermarket parts may not match the original specifications, leading to potential drivability issues or premature failure.

2. **Reliability and Longevity** The R107 450SL s crank harmonic balancer is a critical component that helps dampen engine vibrations and reduce stress on the crankshaft. A high-quality OEM part will last the life of the engine if properly maintained, reducing the risk of catastrophic failure.

3. **Prevents Engine Damage** A failing harmonic balancer can lead to severe engine damage, including cracked crankshafts or bent connecting rods, due to excessive vibration and torque fluctuations. Replacing it with an OEM part ensures proper function and protects your engine.

4. **Better Performance** A properly functioning harmonic balancer improves smoothness and reduces harshness in engine operation, especially at higher RPMs. This is particularly noticeable in the 450SL s high-revving M117 engine.

5. **Easier Installation (Compared to Aftermarket)** OEM parts are designed to fit seamlessly with the original engine components, reducing the risk of installation errors that could occur with non-genuine alternatives.

6. **Resale Value Preservation** Keeping your 450SL stock or with high-quality OEM parts helps maintain its value, especially if you plan to sell it in the future. Potential buyers often prefer vehicles with original or well-maintained components.

7. **Warranty Coverage (If Purchased New)** If you buy this part new from an authorized Mercedes-Benz dealer or a reputable supplier, it may come with a warranty, providing peace of mind against defects.

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#### **Cons:**

1. **High Cost** OEM harmonic balancers are significantly more expensive than aftermarket alternatives. The price can range from **$300 to $600 **, depending on the source, condition, and whether it s new or used. This is a major upfront investment, especially for a classic car where budget constraints may apply.

2. **Limited Availability (Used Market)** Finding a high-quality used OEM balancer can be challenging. Many suppliers may sell counterfeit or reconditioned parts that aren t truly OEM. You ll need to verify the part s authenticity carefully.

3. **Installation Complexity** Replacing a harmonic balancer requires removing the timing cover, flywheel, and sometimes the clutch (if applicable), which can be labor-intensive. If you re not experienced with engine work, you may need to pay a mechanic, adding to the cost.

4. **Potential for Counterfeit Parts** The aftermarket for classic Mercedes parts is flooded with fakes, especially on eBay or untrusted sellers. A non-genuine balancer may fail prematurely or not fit correctly, leading to further damage.

5. **Maintenance Overhead** While the balancer itself doesn t require frequent maintenance, the process of replacing it involves stripping down part of the engine, which may expose other wear items (e.g., timing belt, water pump, seals). This could lead to additional unexpected repairs.

6. **Time-Consuming** If you re doing the work yourself, the job can take **4-8 hours**, depending on your skill level and the condition of surrounding components. This is a significant time commitment for a classic car owner.

7. **Alternative Solutions (Less Ideal)** Some owners consider using a **universal harmonic balancer** or a **rebuilt OEM balancer** to save money, but these are not ideal. Universal balancers may not match the exact weight and balance of the original, and rebuilt parts may not be as reliable.

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### **Conclusion:**

The **Mercedes-Benz 1170300506 crank harmonic balancer is the best choice** for your 72-89 R107 450SL if you prioritize **long-term reliability, engine protection, and authenticity**. While it is expensive and labor-intensive to replace, the risks of using a non-OEM part such as engine damage, poor performance, or premature failure far outweigh the benefits of cheaper alternatives.

However, if budget is a major concern, you should **thoroughly research the seller** to ensure you re getting a **genuine OEM part** (not a fake or reconditioned knockoff). If possible, purchase from an **authorized Mercedes-Benz parts dealer** or a **trusted classic car specialist** to avoid counterfeit items.

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### **Recommendation:** 1. **If You Can Afford It:**

- **Buy a new or high-quality used OEM part** from a reputable source (e.g., **Mercedes-Benz Classic Center, Classic Parts Warehouse, or a trusted local dealer**).

- **Have a mechanic inspect the surrounding components** (timing belt, water pump, seals) while the engine is disassembled to prevent future issues.

- **Consider professional installation** if you lack experience with engine work to ensure proper torque specifications and alignment.

2. **If Budget is Tight (But You Still Want Reliability):**

- **Look for a verified used OEM balancer** with proof of authenticity (e.g., original Mercedes-Benz packaging, serial number verification).

- **Avoid universal or aftermarket balancers** unless you re certain they match the exact weight and balance of the original.

- **Document the replacement** with photos and receipts to justify the cost if you ever sell the car.

3. **Preventative Tip:**

- If your balancer is **cracked, loose, or visibly worn**, replace it **immediately** delaying could lead to **catastrophic engine damage**.

- If you re unsure about the part s condition, **remove and inspect it** before purchasing. A healthy balancer should have **no cracks, proper weight distribution, and a tight fit on the crank**.

### **Final Verdict:**

**Worth the investment for long-term reliability.** The harmonic balancer is a **critical safety and performance component**, and using an OEM part ensures your 450SL remains in optimal condition. If you re working on a classic car, **cutting corners here is not recommended** the consequences of failure are severe.

Details:

Used, sold for parts or core exchange only. Timing marks visible and legible on the outer ring. Iron hub and disc are intact with no cracks or damage. The outer rubber damper layer shows cracking and deterioration not suitable for installation.

part #: 1170300506 prices

  • $25.00-$60.00

specifications cranshafengin:

  • for models: R107, 450sl
  • for makes: Mercedes
  • mpn: 1170300506
  • part type: Crank Balancer
  • country of origin: Germany

shipping cranshafengin:

  • carrier: USPS
  • cost: $10.60
  • transit: 4-10 Days
  • class: Standard
  • type: Calculated
  • service: USPS Ground Advantage

seller cranshafengin:

  • # reviews: 34
  • rating: 100.0%
  • city: Santa Ana, California

general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
  • condition: For parts or not working

returns cranshafengin:

  • policy: No Returns

offer cranshafengin:

  • sold: 0
  • availability: In Stock
  • started: May 11, 2026
  • options: Ship-to-home
  • quantity: 1

payments cranshafengin:

  • other
  • wallet: Apple-pay
  • credit card: Visa
for models: r107, 450sl, for makes: mercedes, part type: crank balancer, country of origin: germany,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 20294425556309751,
Mercedes 1170300506 Is Similar To:
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2 offers $25.00–$60.00 USD
  • For parts or not working. Offer #1 priced at $25.00 + $10.60 shipping estimate = $35.60* total. Timing marks visible and legible on the outer ring Used, sold for parts or core exchange only.+$10.60 shipping
  • Used. Offer #2 priced at $60.00 + $0.00 shipping estimate = $60.00* total. FREE SHIPPING

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