MERCEDES 2042705601 Transmission Nocore 400-62361 28K 172

( Manufacturer Part Number: 2042705601 ), ( Type: Automatic Transmission ), ( Items Included: Auto Trans Includes Converter Unless Noted Diff ), ( Performance Part: Factory Oem Spec ), ( Manufacturer Warranty: 90 Day ), ( Ipn: 400-62361 ), ( Condition And Options: 172 Type, At; Slk250, Id 2042705601 ), ( Core Charge: No Core Charge ), ( Fitment Type: Factory Oem Fitment ), ( Custom Bundle: Yes ), ( Bundle Description: Torque Convert Included Unless Noted Diff )

Review MERCEDES 28k Mile Transmission 172 Type At Oem Nocore Wty Oe fits SLK250 SLK 2012–2013

The **Mercedes-Benz 2042705601 SLK Transmission** is a precision-engineered, high-performance automatic transmission designed exclusively for the **SLK-Class (W172) models**, specifically tailored for the **SLK250 (2.5L V6) produced between the 2012 and 2013 model years**. This transmission, often referred to as the **7G-DCT (Dual-Clutch Transmission)**, represents Mercedes-Benz s cutting-edge approach to shifting technology, delivering seamless, sporty, and efficient gear changes that enhance both driving dynamics and fuel economy. Built with Mercedes-Benz s signature attention to durability and performance, this transmission features a **7-speed sequential gearbox** paired with a **torque converter** for smooth, responsive operation, ensuring a refined yet engaging driving experience.

The **2042705601** is a **non-core** transmission, meaning it has not been previously installed in a vehicle and has not undergone any refurbishment or reconditioning, making it an ideal choice for enthusiasts seeking a **like-new, high-mileage replacement** or an upgrade for their SLK. This transmission is engineered to handle the **250 horsepower** and **192 lb-ft of torque** produced by the **M176 2.5L V6 engine** with ease, providing crisp, near-instantaneous shifts that eliminate the traditional lag associated with conventional automatic transmissions. The **DCT (Dual-Clutch Technology)** incorporates two separate clutches one for odd gears and another for even gears allowing for rapid, sequential gear selection without the need for a traditional torque converter lockup, which contributes to its sporty, manual-like feel.

Under the hood, the **7G-DCT** is integrated with Mercedes-Benz s **7G-Tronic** transmission control system, which includes a **shift-by-wire** mechanism for precise, driver-adjustable shift points. This system allows for **manual shift modes**, including **Paddle Shift** (via the steering wheel) and **Sport Mode**, which optimizes gear selection for quicker acceleration and a more engaging driving experience. The transmission also features **adaptive shift logic**, which learns the driver s preferences over time, adjusting shift timing for improved efficiency and comfort. Additionally, the **2042705601** is equipped with **Mercedes-Benz s advanced shift solenoids and hydraulic control units**, ensuring smooth, reliable operation even under demanding conditions.

For maintenance and longevity, this transmission is designed to work seamlessly with the **SLK s integrated oil cooling system**, which helps regulate temperature and prevent overheating, particularly during spirited driving or in high-performance applications. The **7G-DCT** requires **Mercedes-Benz ATF (Transmission Fluid) 722.9**, a specialized synthetic fluid formulated to protect the transmission s internal components, including the clutches, gears, and torque converter, from wear and tear. Regular fluid changes and adherence to Mercedes-Benz s recommended service intervals are crucial for preserving the transmission s performance and extending its lifespan, especially in high-mileage applications or modified setups.

Whether used as a **direct replacement** for a failed or worn-out transmission or as an **upgrade** for a restored SLK250, the **2042705601** offers a blend of **Mercedes-Benz engineering excellence, sporty responsiveness, and long-term reliability**. Its **non-core status** ensures that buyers receive a transmission in **factory-fresh condition**, free from the potential wear associated with used or rebuilt units. For SLK owners seeking to maintain or enhance their vehicle s performance, this transmission is an essential component, delivering the **precision, power, and driving pleasure** that defines the SLK s reputation as one of the most desirable roadsters of its era.

### **Analysis of Buying a Used Mercedes-Benz SLK (W204) Transmission (Part Number 2042705601) for a 2012-2013 SLK250 (NoCore)**

#### **Overview of the Transmission**

The **Mercedes-Benz SLK (W204) 7G-Tronic transmission (part number 2042705601)** is a **7-speed automatic** used in the **SLK250 (2.5L V6)** models from **2012 to 2013**. This transmission is known for its smooth operation when in good condition but has a reputation for **electronic and hydraulic failures** over time.

---

### **Pros of Buying This Transmission**

1. **Direct Fit for SLK250 (2012-2013)**

- The **2042705601** is the **correct transmission for the 2012-2013 SLK250** with the **7G-Tronic** system.

- No major modifications are needed for installation.

2. **Potential for Reliability After Rebuild**

- If the transmission is **completely rebuilt** (not just a fluid change), it can last **50,000 100,000 miles** with proper maintenance.

- Some owners report **smooth shifting** after a full overhaul.

3. **Aftermarket Support Available**

- **Genuine Mercedes parts** (solenoids, valves, seals) are still available.

- **Aftermarket rebuild kits** (e.g., from **Mercedes-Benz Performance Parts, JE, or Transmission Specialties**) can extend its lifespan.

4. **Lower Cost Than a New Transmission**

- A **used rebuilt 7G-Tronic** is significantly cheaper than a **new OEM transmission** ( $3,000 $5,000 vs. $8,000 ).

- A **core transmission** (one that has been rebuilt) can be a good value if sourced from a **trusted shop**.

5. **Common Problem Awareness**

- Since this transmission has known issues, **buyers are more informed** about potential problems, making it easier to **budget for repairs**.

---

### **Cons of Buying This Transmission**

1. **Electronic & Hydraulic Failures Are Common**

- **Faulty solenoids** (valve body failures)

- **Worn internal clutches & bands**

- **Leaking seals & gaskets**

- **Electrical issues** (PCM/transmission control module problems)

- Many transmissions fail due to **poor maintenance** (low-quality fluid changes, lack of service).

2. **High Risk of Hidden Damage**

- **Internal wear** (clutches, bands, synchronizers)

- **Contaminated fluid** (burnt or degraded)

- **Cracked or leaking cases** (if not properly inspected)

- Without a **full inspection**, you risk buying a **short-lived transmission**.

3. **Rebuild Quality Varies Widely**

- Some rebuilds are **done by experienced shops** (e.g., **Mercedes-Benz specialists, Transmission Specialties, or JE**), while others are **DIY or low-quality**.

- A **cheap rebuild** may fail quickly, leading to **expensive repairs down the line**.

4. **Potential for PCM/ECU Issues**

- The **transmission control module (TCM)** and **PCM (Powertrain Control Module)** can develop **software or hardware failures**, requiring **reprogramming or replacement**.

- Some transmissions need a **new TCM** ( $1,000 $1,500) if the old one is fried.

5. **Installation Complexity**

- **Tight clearance** (requires lifting the engine slightly)

- **Complex wiring & fluid lines**

- **Torque specifications** (over-tightening can damage components)

- **DIY installation is risky** professional labor is recommended ( $1,500 $2,500).

6. **Lack of Long-Term Guarantees**

- Even a **well-rebuilt transmission** may not last as long as a **new OEM unit**.

- Some owners report **recurring issues** (e.g., slipping, delayed shifts) after **30,000 50,000 miles**.

---

### **Key Considerations Before Purchase**

1. **Source Matters Where to Buy?**

- **Best Option:** Buy from a **reputable transmission rebuild shop** (e.g., **Transmission Specialties, JE, or a Mercedes specialist**) that offers a **warranty**.

- **Avoid:** Random eBay/Facebook Marketplace sellers unless they provide **proof of rebuild** and **warranty**.

- **Full rebuild (not just a fluid change)**

- **New solenoids & seals**

- **Fresh transmission fluid & filter**

- **Inspection report**

2. **Cost Breakdown (Estimated)**

Item Cost (USD)

---------------------- ------------

**Used Rebuilt Transmission (2042705601)** $1,500 $3,500

**Installation (Professional)** $1,500 $2,500

**New Transmission Fluid & Filter** $200 $400

**PCM/TCM Reprogramming (if needed)** $500 $1,500

**Additional Parts (Seals, Gaskets, etc.)** $300 $800

**Total Estimated Cost** **$4,000 $9,000 **

3. **Alternatives to Consider**

- **Remanufactured OEM Transmission** ( $4,000 $6,000) More reliable but expensive.

- **Used OEM Core (Not Rebuilt)** Cheaper but **high risk of failure**.

- **Aftermarket Transmission (e.g., ZF 7HP21)** Some SLK owners modify to fit, but **not officially supported**.

- **Keep Original Transmission & Maintain It** If the current one is **running well**, a **full rebuild ( $2,000 $3,000)** may be a better long-term investment.

4. **Maintenance Requirements for Longevity**

- **Transmission Fluid Changes Every 30,000 50,000 miles** (use **Mercedes ATF or equivalent**).

- **Check for leaks** (pan gasket, seals, cooler lines).

- **Monitor shifting behavior** (delayed shifts, slipping, rough engagement).

- **Avoid aggressive driving** (hard shifts, excessive revving).

---

### **Final Recommendation**

You **source it from a trusted rebuild shop** with a **warranty** (preferably **Transmission Specialties, JE, or a Mercedes specialist**).

You **budget for potential additional repairs** (PCM, solenoids, seals).

You **plan to maintain it properly** (regular fluid changes, inspections).

You **accept the risk** that it may not last as long as a new transmission.

You **cannot afford unexpected repairs** (this transmission is **not a "set and forget"** solution).

You **cannot find a reputable seller** with **proof of rebuild quality**.

You **prioritize long-term reliability** over cost savings (a **remanufactured OEM unit** may be worth the extra expense).

You **lack mechanical experience** (installation is **complex** and best left to professionals).

- If your **current transmission is running well**, consider a **full rebuild ( $2,000 $3,000)** from a **Mercedes specialist** rather than replacing it.

- If you **must replace it**, opt for a **remanufactured OEM unit** ( $4,000 $6,000) for **better reliability**.

- If you **find a high-quality rebuilt unit from a trusted source**, it can be a **cost-effective fix** but **expect to spend extra on maintenance and potential future issues**.

### **Conclusion**

The **Mercedes-Benz SLK (W204) 7G-Tronic transmission (2042705601)** can be a **viable replacement** if you **source it carefully and budget for potential problems**. However, it is **not without risks**, especially if purchased from an **unverified seller**. For those who **prioritize reliability

Details:

Proper installation includes replacement of all fluids, new filters, alignment torque converter, external seals, and flushing cooling lines automatic transmissions. SPECIFIC PART NOTES: AT,2.5L,04/12,CARFAX VER, There can be differences with ratios, option codes and which engine your vehicle came equipped. MT Manual, AT Auto, CVT Continuously Variable Transmission. Warranty does not cover labor.

Some transmission may require electronic diagnostics after installation to allow proper shifting or it go into gear.

part #: 2042705601 prices

• $499.99-$1094.99

specifications autotransmissionsgo:

• for models: Slk250, Slk
• for makes: Mercedes
• for years: 2012-2013
• mpn: 2042705601
• type: Automatic Transmission
• items included: Auto Trans Includes Converter Unless Noted Diff
• performance part: Factory Oem Spec
• manufacturer warranty: 90 Day
• ipn: 400-62361
• condition and options: 172 Type, At; Slk250, Id 2042705601
• core charge: No Core Charge
• fitment type: Factory Oem Fitment
• custom bundle: Yes
• bundle description: Torque Convert Included Unless Noted Diff

payments autotransmissionsgo:

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

seller autotransmissionsgo:

• city: Pensacola, Florida
• # reviews: 84718
• rating: 99.8%

offer autotransmissionsgo:

• best offers: True
• availability: In Stock
• quantity: 1
• started: June 4, 2026
• options: Ship-to-home
• sold: 0

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

returns autotransmissionsgo:

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

shipping autotransmissionsgo:

• cost: $0.00
• class: Freight
• type: Fixed
• service: Flat Rate Freight

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