MERCEDES 725-270-47-18-87 Transmission Benz

( Model: 43 53 CLS450 E450 E53 S500 CLS53 CLS400 ), ( Part Type: Transmission ), ( Genuine Oem: Yes ), ( Oem Part Number: 725-270-47-18-87 ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Mercedes-benz ), ( Year: 2017 2019 2020 2021 2022 2023 ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included ), ( Replaces Part Number: 213270020280, 213270020287, 725270471880 ), ( UPC: 725270471887 )

Review MERCEDES benz Genuine Transmission fits CLS450 2017–2023

The **Mercedes-Benz 725.270.47.18.87 transmission** is a meticulously engineered, high-performance automatic transmission designed exclusively for the luxury and performance-oriented vehicles of the Mercedes-Benz W126 and W124 series, including iconic models like the 500 SEL, 560 SEC, and 500 SL. This transmission represents the pinnacle of Mercedes-Benz s engineering prowess in the late 1980s and early 1990s, combining advanced hydraulic and mechanical systems to deliver seamless, responsive shifts with exceptional durability. Built with a robust **four-speed automatic** architecture, it incorporates a **torque converter** with a robust impeller and turbine assembly, allowing it to handle the substantial power outputs of the high-performance M117 and M116 inline six-cylinder engines, as well as the legendary 32-valve M117/70 and M117/71 V8 powerplants found in the 560 SEC and 500 SEL models. The transmission s **planetary gearset** is precision-machined from high-grade alloy steel, ensuring minimal wear and optimal efficiency across a broad range of driving conditions, from spirited highway cruising to demanding towing scenarios.

One of the standout features of this transmission is its **electro-hydraulic shift control system**, which employs a sophisticated valve body and solenoids to modulate fluid pressure with remarkable precision. This system allows for **instantaneous, smooth gear changes** with minimal lag, a hallmark of Mercedes-Benz s commitment to driver engagement and comfort. The transmission also incorporates a **lock-up clutch** in overdrive, which engages under steady-speed cruising conditions to improve fuel efficiency by eliminating slippage in the torque converter. The robust **oil pump** and **filter system** ensure consistent lubrication, protecting the internal components from excessive heat and friction, while the **coolant passages** within the transmission housing help dissipate thermal energy, extending the unit s lifespan even under heavy loads.

Built to withstand the demands of high-performance driving, the **725.270.47.18.87** features a **heavy-duty housing** cast from high-strength aluminum or iron, depending on the application, with reinforced mounting points to absorb vibrations and reduce noise. The **gear ratios** are finely tuned for both performance and practicality, offering a balanced mix of acceleration and fuel economy ideal for the luxury sedans and coup s it powers. The transmission s **reverse gear** is designed with a dedicated planetary set to ensure smooth, predictable engagement, while the **parking pawl** mechanism provides a secure lock when the vehicle is stationary. This unit is also equipped with a **shift interlock system**, preventing accidental engagement of reverse while the vehicle is in motion, a safety feature that reflects Mercedes-Benz s emphasis on driver protection.

For enthusiasts and restorers, the **725.270.47.18.87** remains a highly sought-after component due to its reliability and performance. While modern transmissions have evolved with electronic controls and variable displacement pumps, this classic automatic retains a timeless appeal for those who appreciate the artistry of mechanical engineering. Proper maintenance, including regular fluid changes with **Mercedes-Benz ATF 7.5W-140 or equivalent high-quality automatic transmission fluid**, is essential to preserving its longevity. When paired with a well-tuned engine and suspension, this transmission delivers the effortless, refined performance that Mercedes-Benz drivers have come to expect, making it a cornerstone of the brand s legacy in automotive excellence.

### Pros and Cons of Buying a Mercedes-Benz 725.270.47.18.87 Transmission

The **Mercedes-Benz 725.270.47.18.87** is a **7G-Tronic 725** automatic transmission, commonly found in older Mercedes-Benz models (particularly from the late 1990s to early 2000s). Below is a detailed breakdown of its advantages and disadvantages.

---

### **Pros**

1. **Proven Reliability (When Well-Maintained)**

- The **7G-Tronic 725** was a robust transmission for its time, especially in high-performance applications like the **E55 AMG** or **S55 AMG**.

- Many units lasted well over **200,000 miles** when properly serviced with **Mercedes-specific fluid (e.g., MB 236.14 or equivalent)** and regular maintenance.

2. **Strong Torque Handling**

- Designed to handle **high torque** (common in AMG models), making it suitable for performance driving.

- Better suited for **high-power engines** compared to some contemporary transmissions.

3. **Availability of Parts & Aftermarket Support**

- Being an older transmission, **parts are still available** from Mercedes dealers, aftermarket suppliers, and rebuilders.

- **Remanufactured units** are often cheaper than OEM replacements, though quality varies.

4. **Compatibility with Tuning & Modifications**

- Many **AMG-tuned engines** (e.g., **E55, S55, E63**) rely on this transmission, so it can handle **forced induction and power increases** better than some newer transmissions.

- Aftermarket **valve body kits** and **software tuning** can improve shift quality and performance.

5. **Lower Cost Compared to Newer Transmissions**

- Replacing a **failed 7G-Tronic 725** is often **cheaper than installing a newer 7G-Tronic 725.2 or 7G-Tronic 8G** in some cases.

- **Labor costs** for removal/installation are reasonable compared to more complex modern transmissions.

6. **Proven Durability in Some Applications**

- In **high-mileage but well-maintained** Mercedes (e.g., **E55 AMG, S55 AMG, E63 AMG**), this transmission has a reputation for lasting long if **fluid changes and inspections** were done regularly.

---

### **Cons**

1. **Complexity & Repair Difficulty**

- The **7G-Tronic 725** is **notoriously complex**, with **hydraulic, mechanical, and electronic components** that require specialized knowledge to diagnose and repair.

- **Valve body wear** (leading to rough shifts or no engagement).

- **Solenoid failures** (causing delayed shifts or no shifting at all).

- **Torque converter issues** (slipping, overheating).

- **Clutch packs and bands** wearing out over time.

- **Diagnosis often requires a scan tool** (e.g., **Mercedes DAS, Launch X-431, or equivalent**) to read fault codes.

2. **High Repair Costs if Not Maintained**

- Unlike simpler transmissions, **minor issues can escalate quickly** if ignored.

- **Valve body replacement** alone can cost **$1,500 $3,000** depending on labor and parts.

- **Full rebuilds** (if the transmission is beyond repair) can exceed **$4,000 $6,000** in labor and parts.

3. **Sensitive to Fluid & Maintenance Neglect**

- **Old or degraded transmission fluid** is a **leading cause of failure**.

- **Fluid changes should be done every 30,000 50,000 miles** (Mercedes recommends **every 60,000 miles**, but this is often too long).

- **Contaminated fluid** (from poor seals or leaks) accelerates wear on **clutches, bands, and solenoids**.

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

- **Electronic issues** (e.g., **PCM or transmission control module failures**) can cause **random shifts, no engagement, or stall-outs**.

- **Hydraulic leaks** (from **seals, lines, or the valve body**) can lead to **loss of pressure**, causing **hard shifts or no shifts at all**.

- **Solenoid failures** (often due to **dirty fluid or electrical issues**) are a **frequent complaint**.

5. **Limited Longevity Compared to Modern Transmissions**

- While some **7G-Tronic 725** units last **200,000 miles**, many fail **between 100,000 150,000 miles** if not properly maintained.

- **Newer 7G-Tronic variants (725.2, 725.3, etc.)** and **8G-Tronic** transmissions are **more refined** but also **more expensive to repair**.

6. **Difficulty Finding Qualified Mechanics**

- **Not all Mercedes specialists** are familiar with the **7G-Tronic 725**, especially the **older models**.

- **Aftermarket mechanics** may charge **premium rates** for repairs due to complexity.

- **DIY repairs** are **possible but risky** many owners end up **worsening issues** without proper tools or experience.

7. **Potential for Hidden Damage**

- If the transmission has **already failed**, **internal damage** (e.g., **worn clutches, broken bands, or damaged shafts**) may require a **full rebuild or replacement**.

- **Buying a used transmission** without a **full inspection** can lead to **expensive surprises**.

8. **Compatibility Issues with Modern Tuning**

- While it handles **power increases well**, **modern tuning (e.g., forced induction, remapping)** can **stress the transmission** more than stock applications.

- **Aftermarket valve bodies** can help, but **poorly tuned systems** may still **overwork the transmission**.

---

### **Ending Conclusion**

The **Mercedes-Benz 725.270.47.18.87 (7G-Tronic 725)** is a **capable but high-maintenance transmission** that excels in **high-performance applications** when properly cared for. It is **notoriously sensitive to neglect**, and **repairs can be costly** if issues are ignored. While it has **proven durability in some cases**, its **complexity, repair difficulty, and failure modes** make it a **high-risk transmission** for many owners.

If you **plan to keep the car long-term**, **regular fluid changes, inspections, and prompt repairs** are **essential**. If you **intend to sell or replace it soon**, the **cost of potential repairs may outweigh the benefits**.

---

### **Recommendation**

- **Get a full transmission inspection** (including **fluid analysis, solenoid testing, and shift quality check**).

- **Verify maintenance history** **fluid changes every 30,000 50,000 miles** are **critical**.

- **Avoid cars with "no history"** many **7G-Tronic failures** go unnoticed until it s too late.

- **Budget for potential repairs** **$1,500 $3,000 ** could be needed if issues exist.

- **Use only Mercedes-approved transmission fluid** (or a **high-quality alternative like Liqui Moly or Motul**).

- **Follow a strict maintenance schedule** **fluid changes every 30,000 miles** (or **50,000 max**).

- **Monitor for warning signs** (rough shifts, delayed engagement, overheating, leaks).

- **Consider an aftermarket valve body kit** if tuning the car (e.g., **AMG Performance, MHD, or custom-built**).

- **Have a mechanic familiar with 7G-Tronic transmissions** on standby for diagnostics.

- **If the transmission is failing**, **weigh the cost of repair** against **resale value**.

- **Remanufactured units** can be a **cost-effective solution**, but **quality varies** **stick with reputable rebuilders**.

- **Consider upgrading to a newer transmission** (e.g., **7G-Tronic 725.2, 7G-Tronic 725.3, or 8G-Tronic**) if **budget allows**, as they are **more reliable and easier to repair**.

- **If the car is high-mileage and the transmission is unreliable**, **evaluate whether the car is worth the hassle** some **lower-mileage models with newer transmissions** may be a better investment.

The **7G-Tronic 725 is a strong transmission in the right hands**, but it **demands meticulous care**. For **enth

Details:

Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Parts must be resalable and in the original packaging. Genuine Mercedes-Benz Transmission 725-270-47-18-87: Parts: Agm 53.

With 4-mastic.

part #: cls450 prices

• $1503.26-$3807.19

specifications autotransmissionsgo:

• for makes: Mercedes
• for years: 2017-2023
• model: 43 53 Cls450 E450 E53 S500 Cls53 Cls400
• part type: Transmission
• genuine oem: Yes
• oem part number: 725-270-47-18-87
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• make: Mercedes-benz
• year: 2017 2019 2020 2021 2022 2023
• parts included: Only Part Reference 0 On The Diagram Is Included
• replaces part number: 213270020280, 213270020287, 725270471880
• upc: 725270471887

returns autotransmissionsgo:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

seller autotransmissionsgo:

• rating: 98.5%
• # reviews: 189
• city: Laguna Niguel, California

shipping autotransmissionsgo:

• class: Freight
• cost: $750.00
• service: Flat Rate Freight
• type: Fixed

offer autotransmissionsgo:

• sold: 0
• availability: In Stock
• started: April 25, 2026
• options: Ship-to-home
• quantity: 2

payments autotransmissionsgo:

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

general autotransmissionsgo:

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

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