MERCEDES M274 Engine Piston Set 1705305697112 304-998372 W205 W213 R171 X254 2.0L

( Part Type: Engine Piston ), ( Donor Year: 2017 ), ( Donor Model: C300 ), ( Ipn: 304-998372 ), ( Miles: 144, 352 ), ( Tag: V54528 ), ( EAN: 1705305697112 )

Review MERCEDES 2.0l Engine Piston Set fits GLC SLC SLK 2015–2022

The **Mercedes-Benz 1705305697112 Engine Piston Set (2.0L M274, W205/W213/W254/R171)** is a high-performance, precision-engineered replacement component designed exclusively for the **M274 DE20LA** inline-four engine found in select Mercedes-Benz models, including the **GLC (X204), SLC (R171), SLK (R171), and the W205 C-Class (facelift)** produced between **2015 and 2022**. This piston set is a critical upgrade for engines experiencing excessive wear, compression loss, or mechanical failure, ensuring restored power, efficiency, and longevity. Crafted from **high-grade aluminum alloy (typically A390 or A392)**, these pistons are engineered to withstand the extreme thermal and mechanical stresses of modern turbocharged direct-injection (TDI) and gasoline engines, delivering superior heat dissipation and structural integrity. The set includes **four precision-machined pistons**, each featuring **optimized ring grooves** for improved oil control and reduced friction, paired with **high-quality piston rings** (compression and oil control) that enhance sealing performance and minimize blow-by. The **wrist pins** are often included as part of the kit, ensuring a complete rebuild solution, while some variants may incorporate **forged or coated pistons** for enhanced durability in high-performance or modified applications. Whether addressing **ring wear, piston scuffing, or catastrophic failure**, this piston set is a direct-fit replacement that adheres to OEM specifications, guaranteeing seamless integration with the **M274 s cylinder bore** (typically **82.5mm**) and **connecting rod journals**. Ideal for professional mechanics and DIY enthusiasts alike, this component is a cornerstone of a thorough engine overhaul, helping restore the **GLC, SLC, SLK, or C-Class** to peak performance with reliability and efficiency.

### **Pros and Cons of Buying a Mercedes-Benz GLK/CLK/SLK (W205/W213/R171) with a 2.0L M274 Engine and Piston Set (VIN: 1705305697112, 2015 2022)**

#### **Overview of the Vehicle**

This is a **Mercedes-Benz GLK (W205), CLK (W213), or SLK (R171)** model equipped with the **2.0L M274 inline-four engine**, which was used across these platforms between 2015 and 2022. The **piston set** mentioned suggests that the engine has undergone at least one major internal overhaul, which can be a positive or negative indicator depending on the condition and work done.

---

### **Pros**

1. **Reliability of the M274 Engine (When Well-Maintained)**

- The **M274** is a robust engine when properly serviced. It is known for its **durability in turbocharged applications** if oil changes, timing belt, and other critical components are regularly maintained.

- **Turbocharged (2.0T) version** provides **good power output** ( 258 hp in GLK, 282 hp in SLK) and decent torque, making it suitable for daily driving and light towing (GLK models).

- **Direct injection** improves efficiency, though it can contribute to carbon buildup if not properly maintained.

2. **Comfortable and Refined Ride (Especially GLK & CLK)**

- The **W205 GLK** is a **luxury SUV crossover** with a smooth ride, good handling, and a spacious interior ideal for families or those who want a premium SUV experience.

- The **W213 CLK** is a **coupe/Sedan** with a sportier feel, offering a more engaging driving experience than typical sedans.

- The **R171 SLK** is a **convertible roadster** with a **lightweight, nimble chassis**, making it enjoyable for spirited driving when the top is down.

3. **Modern Features & Technology (Depending on Trim)**

- **Comfort Access (keyless entry), MBUX infotainment (in later models), adaptive cruise control, and advanced driver aids** (if equipped).

- **Good sound system and premium interior materials** (especially in higher trims like **GLK 350, CLK 53 AMG, or SLK 55 AMG**).

- **Available 4MATIC all-wheel drive** (on GLK/CLK) improves traction in adverse conditions.

4. **Resale Value (Compared to Competitors)**

- Mercedes-Benz retains **strong resale value** compared to many luxury brands, though it has declined slightly in recent years.

- **Lower-mileage examples (under 60,000 km/year) hold value better** than high-mileage ones.

5. **Potential for Modifications (SLK & CLK)**

- The **SLK (R171)** is a **popular platform for modifications**, including **engine swaps (e.g., AMG M136), suspension upgrades, and exhaust tuning**.

- The **CLK (W213)** can also be tuned for better performance, though it is less common than the SLK.

6. **Piston Set Indicates Engine Work Was Done**

- A **piston set** suggests that the **engine was disassembled and rebuilt**, which is a **positive sign** if done professionally.

- **New pistons, rings, and bearings** can extend the engine s lifespan if the rest of the engine (valvetrain, turbo, oil pump) was also serviced.

- **Warning:** Ensure the **timing belt, water pump, and oil pump** were replaced during the overhaul failure in these areas can be catastrophic.

7. **Availability of Parts & Mechanics**

- Mercedes-Benz has a **wide network of dealerships and independent mechanics** familiar with these models.

- **Aftermarket support is strong**, especially for the **SLK (R171)**, which has a dedicated tuning community.

---

### **Cons**

1. **High Maintenance Costs**

- Mercedes-Benz is **notoriously expensive to maintain**, especially for **non-AMG models**.

- **Timing belt & water pump replacement** ( $1,000 $1,500 every **60,000 100,000 km**).

- **Turbocharger failures** (M274 can suffer from **oil starvation or carbon buildup**, leading to expensive replacements).

- **Suspension & steering components** (struts, bushings, rack & pinion) wear out quickly.

- **Electrical issues** (infotainment glitches, sensor failures, keyless entry problems).

- **Independent mechanics may charge less, but dealerships often require OEM parts.**

2. **Reliability Concerns (If Neglected)**

- The **M274 is not bulletproof** **carbon buildup, oil consumption, and turbo failures** are common if maintenance is skipped.

- **Oil leaks** (valve cover gasket, oil filter housing gasket) are frequent issues.

- **Transmission problems** (especially in **7G-Tronic automatic**) can be expensive to repair ( $3,000 $5,000 for a rebuild).

- **Water pump failures** (if not replaced with the timing belt) can lead to **engine overheating and catastrophic damage**.

3. **Depreciation & Resale Value Drop**

- Mercedes-Benz **depreciates faster than some luxury competitors** (e.g., Lexus, Audi).

- **Higher-mileage examples (over 120,000 km) lose value quickly** unless well-documented.

- **SLK (R171) and CLK (W213) have lower long-term retention** compared to SUVs like the GLK.

4. **Fuel Economy is Average for a Luxury Car**

- **M274 2.0T gets 10 12 L/100km in real-world driving** (worse than a **BMW 330i or Audi A4 2.0T**).

- **Diesel alternatives (OM654) are more efficient** but have their own reliability issues.

5. **SLK (R171) Specific Issues**

- **Soft top reliability** (seals, cables, and mechanisms wear out over time).

- **Rear suspension wear** (ball joints, bushings) leads to **clunking noises**.

- **Electrical gremlins** (windows, mirrors, infotainment lag).

- **Less practical than a coupe or SUV** (no rear seats, limited cargo space).

6. **GLK (W205) Specific Issues**

- **Rear differential whine** (common in early models).

- **Infotainment lag** (especially in **MBUX-equipped models**).

- **Rear suspension wear** (similar to SLK, but more noticeable due to SUV weight).

7. **CLK (W213) Specific Issues**

- **Rear axle whine** (common in early models).

- **Soft top (if equipped) reliability** (if not well-maintained).

- **Less refined ride than a GLK** (stiffer suspension).

8. **Potential for Scams (Used Market Risks)**

- **VIN 1705305697112** should be **verified for accident history, flood damage, or salvage title** (use **Carfax, Autocheck, or Mercedes-Benz s own history report**).

- **Odometer fraud** is possible check for **inconsistencies in service records**.

- **Fake piston set work** ensure the **engine was fully rebuilt** (not just pistons replaced without other critical components).

---

### **Key Considerations Before Buying**

1. **Service & Maintenance History**

- **Timing belt & water pump replacements** (critical for M274).

- **Oil changes** (synthetic, high-quality oil recommended).

- **Turbo servicing** (if turbo has been replaced, ask why).

- **Transmission fluid changes** (7G-Tronic needs fresh fluid).

- **Carbon buildup** (if the engine has high mileage, consider **port cleaning**).

2. **Engine Condition After Piston Set**

- **Was the entire engine rebuilt?** (Not just pistons check if **valvetrain, turbo, oil pump, and seals** were replaced).

- **Oil consumption test** (run the engine for 10 15 minutes, check oil level **excessive consumption is a red flag**).

- **Compression test** (if possible, to ensure pistons/seals are sealing properly).

3. **Transmission & Drivetrain**

- **Listen for unusual noises** (whining, grinding in automatic transmissions).

Details:

SHIPPING DEALS: Review our shipping details before you purchase. Initial testing consists of starting the vehicle, running code scans, road if safe to do so, and completing an extensive inspection checklist. 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.

Made for USA Vehicles: All vehicles and parts are manufactured to be sold the market. Left-Hand Drive Vehicles. The more actions option. After items are removed and cleaned they inspected one final time before posting.

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

The pictures are the ACTUAL PICTURES OF THE ITEM FOR SALE.

part #: 1705305697112 prices

• $175.00-$249.99

specifications pistonringro:

• for models: Glc, Slc, Slk
• for makes: Mercedes
• for years: 2015-2022
• part type: Engine Piston
• donor year: 2017
• donor model: C300
• ipn: 304-998372
• miles: 144, 352
• tag: V54528
• ean: 1705305697112

returns pistonringro:

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

offer pistonringro:

• options: Ship-to-home
• sold: 0
• started: May 4, 2026
• availability: In Stock
• quantity: 1

seller pistonringro:

• rating: 99.9%
• city: Oroville, California
• # reviews: 30679

general pistonringro:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings

payments pistonringro:

• other
• credit card: Diners-club
• wallet: Google-pay

shipping pistonringro:

• type: Fixed
• transit: 3-8 Days
• cost: $0.00
• class: Standard
• service: Standard

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