MERCEDES 2760105720 Left Cylinder Head 306-59423 3.5L M276

( Manufacturer Part Number: 2760105720 ), ( Part Type: Cylinder Head ), ( Donor Year: 2013 ), ( Oe/oem Part Number: 2760105520, A2760105520 ), ( Ipn: 306-59423 ), ( Miles: 143, 520 ), ( Tag: V54355 )

Review MERCEDES 3.5l Left Cylinder Head fits C350 E350 E400 GLK350 ML350 R350 SLK350 2012–2015

The **Mercedes-Benz 2760105720 3.5L M276 Left Cylinder Head** is a precision-engineered component designed exclusively for the high-performance lineup of Mercedes-Benz vehicles, including the **C350, E350, E400, GLK350, ML350, R350, and SLK350** models equipped with the legendary **3.5-liter M276 inline-six engine**. This cylinder head is a critical part of the engine s combustion system, responsible for housing the intake and exhaust valves, spark plugs, and camshaft components, all of which work in harmony to deliver the iconic blend of power, efficiency, and refinement that Mercedes-Benz is renowned for. Crafted from high-grade cast iron or aluminum (depending on the specific application), this cylinder head is engineered to withstand the extreme thermal and mechanical stresses of high-performance driving, ensuring optimal airflow, combustion efficiency, and long-term durability. The **M276 engine**, known for its smooth operation and robust construction, relies on this cylinder head to maintain precise valve timing, proper sealing, and efficient heat dissipation key factors in achieving the engine s signature balance of torque and responsiveness. Whether installed in the sporty **SLK350** for spirited driving or the versatile **GLK350** for daily adventures, this component plays a vital role in preserving the engine s performance, reliability, and the signature Mercedes-Benz driving experience. For enthusiasts and professionals alike, sourcing an **OEM-quality 2760105720 cylinder head** ensures compatibility with the original engine specifications, maintaining the vehicle s performance standards while offering a cost-effective alternative to full engine replacements.

### **Pros and Cons of Buying a Mercedes-Benz M276 3.5L Engine (C350, E350, E400, GLK350, ML350, R350, SLK350) with a Left Cylinder Head Issue**

The **Mercedes-Benz M276 3.5L V6 engine** (used in models like the C-Class, E-Class, GLK, ML, R-Class, and SLK from 2011 2015) is a powerful and refined powerplant, but it has known reliability concerns particularly with the **left cylinder head (LCH) failure**. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the M276 Engine**

1. **Strong Performance**

- The M276 is a **naturally aspirated 3.5L V6** that produces **265 306 hp** (depending on model and year), delivering smooth power delivery and good acceleration.

- It is well-suited for daily driving and highway cruising, offering a **luxurious, quiet cabin** typical of Mercedes-Benz.

2. **Proven Durability (When Maintained Properly)**

- With **regular oil changes (every 5,000 7,500 miles or as recommended)** and proper maintenance, the M276 can last **200,000 miles**.

- The **turbocharged versions (e.g., M276 DE 350 CDI)** are more efficient but still reliable if serviced correctly.

3. **High Resale Value & Prestige**

- Mercedes-Benz retains strong resale value, especially for well-maintained examples.

- The **luxury brand appeal** makes these models desirable for buyers who prioritize comfort and status.

4. **Available in Multiple Body Styles**

- The M276 powers a variety of models, including **sedans (C350, E350), SUVs (GLK350, ML350), coupes (SLK350), and wagons (R350)**, offering versatility.

5. **Good Fuel Economy (For a V6)**

- Naturally aspirated versions (e.g., E350) achieve ** 20 22 MPG city / 28 32 MPG highway**, which is reasonable for a V6 luxury car.

- Diesel variants (e.g., E350 CDI) offer **better fuel efficiency ( 25 30 MPG combined)** but require more maintenance.

6. **Comfortable & Refined Ride**

- Mercedes **air suspension (on higher trims)** and **sound insulation** provide a smooth, quiet driving experience.

- The **interior quality** is excellent, with premium materials and advanced features (depending on trim).

---

### **Cons of the M276 Engine (Especially with Left Cylinder Head Issues)**

1. **Left Cylinder Head (LCH) Failure The Major Concern**

- The **most critical issue** with the M276 is **left cylinder head cracking or warping**, typically occurring between **80,000 120,000 miles**.

- **Blue smoke from exhaust** (indicating oil burning due to cracked head gaskets).

- **Overheating** (due to coolant leaks from cracked heads).

- **Misfires, rough idle, or loss of power** (as cylinders fail).

- **Coolant in oil or oil in coolant** (visible in dipstick or radiator).

- **Repair cost:** **$3,000 $5,000 ** (labor-intensive, requiring removal of the engine from the vehicle in many cases).

- **Prevention:** Some owners have had success with **specialized cylinder head gaskets (e.g., Fel-Pro or Mopar) and proper torque specs**, but this is not a guaranteed fix.

2. **High Maintenance Costs**

- **Oil changes must be done on time** using the wrong oil (e.g., synthetic blends instead of full synthetic) can **void warranties and accelerate wear**.

- **Timing chain & tensioner replacement** is often needed around **100,000 120,000 miles** ( $1,500 $2,500).

- **Water pump, thermostat, and serpentine belt** replacements are also common ( $800 $1,500).

- **Transmission issues** (especially in **7G-Tronic automatic models**) can add to repair costs.

3. **Electrical & Infotainment Reliability**

- Older Mercedes models (pre-2015) suffer from **software glitches, touchscreen freezes, and Bluetooth connectivity issues**.

- **Parking sensors and lane-keeping assist** can be finicky.

- **Battery drain** is a common complaint, requiring frequent jump-starts.

4. **Recall & Software Updates**

- Some M276 models were affected by **recalls for fuel pump failures, airbag issues, and software updates** buyers should verify if the vehicle has pending recalls.

5. **Depreciation & Reliability Concerns**

- While Mercedes retains value, **reliability issues** (especially the LCH problem) make some buyers hesitant.

- **Insurance costs** may be higher due to repair complexity.

6. **Turbocharged Versions (M276 DE 350 CDI) Have Additional Issues**

- **Turbo lag and hesitation** are common.

- **DPF (Diesel Particulate Filter) clogging** in diesel models can be expensive to clear ( $1,000 ).

- **Exhaust manifold cracks** are a known issue.

---

### **Conclusion**

The **Mercedes-Benz M276 3.5L engine** is a **strong, capable powerplant** that offers **luxury, comfort, and decent performance** when properly maintained. However, the **left cylinder head failure is a major flaw** that can turn a **$30,000 $50,000 car into a $6,000 $10,000 repair project** if neglected.

- **Check maintenance records** proof of **regular oil changes (every 5K 7.5K miles) and cylinder head inspections** is crucial.

- **Get a pre-purchase inspection (PPI) from a Mercedes specialist** they should check for **cracked heads, oil leaks, and timing chain condition**.

- **Budget for potential repairs** especially if the car has **over 100,000 miles**.

- **Consider a warranty or extended service plan** to cover major components.

- You **risk a catastrophic engine failure**, making the car **unreliable and expensive to own**.

---

### **Final Recommendation**

You **find a well-documented example** with **proven cylinder head maintenance** (e.g., recent head gasket replacement).

You **budget for potential future repairs** (especially timing chain, water pump, and transmission).

You **prioritize luxury and comfort** over long-term reliability.

You **plan to keep it for 100,000 miles** with **strict maintenance**.

You **cannot afford major repairs** (LCH failure is the biggest risk).

The **seller cannot provide full maintenance history**.

You **find blue smoke, overheating, or misfires** (these are **red flags**).

You **prefer a more reliable alternative** (e.g., BMW N55, Audi 3.0T, or Toyota V6).

- **BMW N55 (330d, 530d)** More reliable turbo V6, but still has some issues.

- **Audi 3.0T (V6 TDI)** Strong diesel option with better long-term reliability.

- **Lexus GS 350 / Toyota Camry V6** More dependable, lower maintenance costs.

- **Mercedes M272 (2.0L turbo, post-2015 models)** More modern, but still has some reliability quirks.

The **M276 is a great car if you find a well-maintained example and accept the risks**. If you **cannot verify its history or afford repairs**, it may not be worth the gamble. **Always prioritize a thorough inspection before buying.**

Details:

SHIPPING DEALS: Review our shipping details before you purchase. The more actions option. Left-Hand Drive Vehicles. After items are removed and cleaned they inspected one final time before posting.

Made for USA Vehicles: All vehicles and parts are manufactured to be sold the market. The pictures are the ACTUAL PICTURES OF THE ITEM FOR SALE. Emissions standards, side of road vehicles drive on, etc. Weather patterns cold vs. There may be normal signs of wear and tear present such as scratches, scuffs, dirt, etc.

On return this item. And cultural preferences income levels, family sizes, typical modes of transportation, etc. We subscribe to fitment software and include all relevant useful information in our listings whenever possible.: Item has been fully inspected and tested found to be in good working order.

Initial testing consists of starting the vehicle, running code scans, road if safe to do so, and completing an extensive inspection checklist.

part #: 2760105720 prices

• $349.95-$1757.50

specifications cylinderheapar:

• for models: C350, E350, E400, Glk350, Ml350, R350, Slk350
• for makes: Mercedes
• for years: 2012-2015
• mpn: 2760105720
• part type: Cylinder Head
• donor year: 2013
• oe/oem part number: 2760105520, A2760105520
• ipn: 306-59423
• miles: 143, 520
• tag: V54355

seller cylinderheapar:

• city: Oroville, California
• rating: 99.9%
• # reviews: 30724

returns cylinderheapar:

• policy: Returns Accepted
• paid by: Seller
• time: 60 Days

offer cylinderheapar:

• options: Ship-to-home
• sold: 0
• quantity: 1
• started: May 5, 2026
• availability: In Stock

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

payments cylinderheapar:

• wallet: Paypal
• other
• credit card: Visa

shipping cylinderheapar:

• class: Standard
• type: Fixed
• transit: 2-6 Days
• service: Standard
• cost: $0.00

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