MERCEDES A2769060260 Engine Motor Left Cylinder Head Benz X166 4.6L M278
fits model: Gl450, 550. make: Mercedes. year: 2013–2016.
( Manufacturer Part Number: A2769060260 ), ( Type: Cylinder Head ), ( Manufacturer Warranty: 6 Months ), ( Material: Aluminum ), ( Vintage Part: No ), ( Finish: Gloss ), ( Country Of Origin: Germany ), ( California Prop 65 Warning: Motor Vehicles California Requires The Following Notice, Oils And Fluids, Battery Posts, Terminals And Related Accessories Which Contain Lead And Lead Compounds And Other Chemicals Known To The State Of California To Cause Cancer, Birth Defects And Other Reproductive Harm. These Chemicals Are Found In Vehicles, Vehicle Parts And Accessories, Both New And As Replacements. When Being Serviced, These Vehicles Generate Used Oil, Waste Fluids, Grease, Fumes And Particulates, All Known To The State Of California To Cause Cancer, Birth Defects, And Reproductive Harm. )
Review MERCEDES benz 4.6l Engine Motor Left Side Cylinder Head fits GL450 550 2013–2016
The **Mercedes-Benz A2769060260** is an original, high-performance cylinder head designed specifically for the **GL-Class (G550 X166) models produced between 2013 and 2016**, which are powered by the legendary **4.6-liter (4,593 cc) M278 V8 engine**. This component is a critical part of the engine s combustion system, responsible for housing the intake and exhaust valves, spark plugs, and camshafts, all of which work in unison to deliver the iconic power and refinement for which Mercedes-Benz is renowned. Crafted from precision-engineered aluminum alloy, the cylinder head is machined to exacting tolerances to ensure optimal airflow, thermal efficiency, and structural integrity under the demanding conditions of high-performance driving. The **M278 engine**, known for its robust design and smooth operation, relies on this cylinder head to maintain peak performance, whether cruising at highway speeds or navigating tight corners with the precision of a luxury grand touring vehicle. This particular part is essential for maintaining the engine s original performance characteristics, including its **367 horsepower (273 kW) and 369 lb-ft (501 Nm) of torque**, which propel the GL550 through winding roads with effortless grace. Whether used for restoration, maintenance, or performance upgrades, the **A2769060260 cylinder head** ensures that the heart of the M278 continues to beat with the same reliability and elegance that Mercedes-Benz has perfected over decades of engineering excellence.
### **Pros and Cons of Buying a Mercedes-Benz GL450 (2013 2016) with a 4.6L M278 Engine (Left Cylinder Head Issue)**
#### **Overview of the Vehicle**
The **Mercedes-Benz GL450 (W166)** from 2013 2016 is a luxury SUV powered by the **4.6L V8 M278 engine**, known for its smooth performance and refined interior. However, this model has faced **cylinder head and valve cover gasket failures**, particularly on the **left cylinder head**, which can lead to significant mechanical and electrical issues.
---
### **Pros**
1. **Strong Engine Performance**
- The **4.6L V8 M278** produces **333 367 hp** (depending on model year) and **369 lb-ft of torque**, providing a **luxurious yet capable** driving experience.
- The engine is **reliable for its class** when properly maintained, offering **good acceleration and towing capacity** (up to **7,716 lbs** in some trims).
2. **Luxury and Comfort**
- The **interior is high-end**, with **premium materials, leather seats, and advanced infotainment** (MBUX in later models).
- **Quiet cabin, smooth ride, and excellent sound insulation** make long drives comfortable.
- **Heated/ventilated seats, panoramic sunroof, and ambient lighting** enhance the luxury experience.
3. **Reliability of the M278 Engine (When Well-Maintained)**
- The **M278 is a proven engine** in Mercedes-Benz vehicles (also used in the **E550, S550, and C63 AMG**).
- **No major design flaws** beyond the **cylinder head and gasket issues**, which are **repairable** if addressed early.
- **Durable transmission (7G-Tronic)** with smooth shifting when serviced properly.
4. **Resale Value and Brand Prestige**
- Mercedes-Benz retains **strong resale value** compared to many competitors.
- The **GL450 is a desirable model**, especially in **luxury SUV markets**, which can help if selling later.
5. **Safety and Technology**
- Equipped with **modern safety features** (depending on year):- **ESP, stability control, multiple airbags, and advanced driver aids** (adaptive cruise, lane-keep assist in later models).
- **Bluetooth, USB ports, and premium audio systems** (some with **Bose or Burmester sound**).
6. **Potential for Modifications & Upgrades**
- The **V8 engine allows for tuning** (though not as common as smaller engines).
- **Aftermarket parts and upgrades** (suspension, exhaust, interior) are widely available.
---
### **Cons**
1. **Left Cylinder Head and Valve Cover Gasket Failures (Most Critical Issue)**
- **Common problem:** The **left cylinder head (bank 1) often develops cracks or leaks**, leading to:- **Oil leaks** (burning oil, smoke from exhaust).
- **Coolant mixing with oil** (white smoke, overheating).
- **Electrical issues** (due to gasket failure affecting sensors).
- **Symptoms:**- **Check Engine Light (P0011, P0016, P0017, P0018, P0019)** for misfires.
- **Oil burning** (blue/gray smoke from exhaust).
- **Overheating** (coolant in oil or oil in coolant).
- **Electrical gremlins** (random sensor failures).
- **Repair Cost:**- **Replacing the left cylinder head gasket** can cost **$3,000 $6,000** (labor-intensive, requires engine removal in some cases).
- **Full cylinder head replacement** (if cracked) can exceed **$5,000 $8,000**.
- **Valve cover gasket replacement** (less severe but still costly at **$1,500 $3,000**).
2. **High Maintenance and Repair Costs**
- Mercedes-Benz is **notoriously expensive** to maintain.
- **Dealer labor rates** are **2 3x higher** than independent shops.
- **Common issues beyond the engine:**- **Transmission problems** (7G-Tronic shifts roughly over time).
- **Electrical gremlins** (infotainment glitches, sensor failures).
- **Suspension wear** (struts, bushings, control arms).
- **Exhaust leaks** (common in V8 models).
3. **Fuel Economy is Poor**
- The **4.6L V8 averages 12 15 MPG city / 16 18 MPG highway**, making it **one of the least efficient luxury SUVs**.
- **High fuel costs** add up over time.
4. **Depreciation and Market Demand**
- While the **GL450 holds value better than some competitors**, it is **not as sought-after as newer luxury SUVs** (e.g., BMW X5, Audi Q7, Lexus LX).
- **Used market is competitive**, and buyers may expect **discounts** due to the **cylinder head risk**.
5. **Rust and Body Issues (Especially in Snowy Climates)**
- Some **2013 2016 GL450s** develop **rust in wheel wells, rocker panels, and undercarriage** if not properly maintained.
- **Check for corrosion** before purchasing.
6. **Comfort and Practicality Trade-offs**
- **Narrow rear seats** (not ideal for tall passengers or third-row seating).
- **Small cargo space** compared to competitors (e.g., Cadillac Escalade, Lincoln Navigator).
- **Heavier than some rivals**, affecting fuel efficiency and handling.
7. **Software and Infotainment Issues**
- **MBUX (later models) can be glitchy** (freezing, lagging).
- **Bluetooth and phone connectivity issues** are common.
- **No Apple CarPlay or Android Auto** (until 2017 models).
---
### **Key Considerations Before Buying**
1. **Verify the Cylinder Head Condition**
- **Get a pre-purchase inspection (PPI) from a Mercedes specialist.**
- **Check for:**- **Oil leaks** (under the engine, around the valve cover).
- **Coolant in oil** (test oil for milky residue).
- **Check Engine Light codes** (P001x codes indicate timing chain or cylinder head issues).
- **Engine compression test** (if available).
- **If the left cylinder head has been replaced, ask for service records.**
2. **Transmission Health**
- **Listen for rough shifting** (7G-Tronic can wear out over time).
- **Check for delayed engagement or slipping.**
3. **Electrical System**
- **Test all sensors, lights, and infotainment.**
- **Look for random warning lights or sensor failures.**
4. **Service History**
- **Ensure the vehicle has had:**- **Regular oil changes** (Mercedes recommends **10,000-mile intervals**).
- **Timing chain inspection** (M278 has a **lifetime chain**, but guides should be checked).
- **No history of neglect** (especially oil changes).
5. **Cost of Repairs vs. Value**
- **If the cylinder head is failing, weigh the repair cost against the vehicle s remaining value.**
- **A fresh cylinder head job can cost more than the car is worth** in some cases.
- **If the issue is minor (gasket only), it may be worth fixing.**
6. **Alternative Options**
- **Consider newer GL models (2017 ) with the **M279 V8 (turbocharged, more efficient)** or **hybrid options (GL550e).**
- **If you need a V8, look at **BMW X5 50i or Audi Q7 3.0T**, which may have better reliability.**
---
### **Final Recommendation**
#### **Buy If:** **You find a well-documented GL450 with:**- **No history of cylinder head issues.**
- **Full service records (oil changes, timing chain inspection).**
- **A recent pre-purchase inspection confirming no leaks or electrical problems.**
**You are prepared for:**- **Higher maintenance costs** (budget **$1,500 $3,000/year** for upkeep).
- **Potential cylinder head repairs** (if bought used, **inspect thoroughly**).
**You prioritize luxury, comfort, and V8 power over fuel efficiency.**
**You plan to keep the vehicle for 3 5 years (not long-term).**
#### **Avoid If:** **The seller cannot provide:**- **Clear service history.**
- **Proof that the cylinder head has been inspected/replaced.**
Details:
part #: a2769060260 prices
- $249.99-$5700.00
specifications cylinderheapar:
- for models: Gl450, 550
- for makes: Mercedes
- for years: 2013-2016
- mpn: A2769060260
- type: Cylinder Head
- manufacturer warranty: 6 Months
- material: Aluminum
- vintage part: No
- finish: Gloss
- country of origin: Germany
- california prop 65 warning: Motor Vehicles California Requires The Following Notice, Oils And Fluids, Battery Posts, Terminals And Related Accessories Which Contain Lead And Lead Compounds And Other Chemicals Known To The State Of California To Cause Cancer, Birth Defects And Other Reproductive Harm. These Chemicals Are Found In Vehicles, Vehicle Parts And Accessories, Both New And As Replacements. When Being Serviced, These Vehicles Generate Used Oil, Waste Fluids, Grease, Fumes And Particulates, All Known To The State Of California To Cause Cancer, Birth Defects, And Reproductive Harm.
general cylinderheapar:
- condition: Used
- Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
offer cylinderheapar:
- best offers: True
- quantity: 1
- options: Ship-to-home
- sold: 0
- availability: In Stock
- started: March 15, 2026
returns cylinderheapar:
- policy: No Returns
payments cylinderheapar:
- credit card: Diners-club
- wallet: Apple-pay
- other
shipping cylinderheapar:
- type: Calculated
- class: Standard
- transit: 4-8 Days
- service: FedEx Ground / FedEx Home Delivery
- cost: $40.13
- carrier: FedEx
seller cylinderheapar:
- # reviews: 182
- city: Altoona, Pennsylvania
- rating: 99.1%
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