STANDARD TS-556 Benz Intermotor Engine Coolant Temperature 091769833589 Sender
fits model: 240d. make: Mercedes. year: 1980–1981.
( Brand: Standard ), ( Manufacturer Part Number: TS-556 ), ( Part Type: Engine Sender ), ( Product Type: Engine Cooling ), ( UPC: 091769833589 ), ( California Prop 65 Warning: Cancer And Reproductive Harm ), ( Universal Fitment: Direct Replacement ), ( Compatible Make S : Mercedes-benz ), ( Product Subtype: Cooling System Switches, Sensors Relays ), ( Series: Intermotor, Intermotor ), ( Product Details: Engine Coolant Temperature Sender ), ( Department: Replacement )
Review STANDARD Mercedes benz Intermotor Engine Coolant Temperature Sender fits 240D 1980–1981
The **Mercedes-Benz TS-556 Intermotor Engine Coolant Temperature Sender** is a precision-engineered sensor designed exclusively for the **M116 2.4L inline-six engine** found in the **1980 1981 Mercedes-Benz 240D**, ensuring accurate and reliable monitoring of coolant temperature within the intermotor cooling system. This high-quality, OEM-compatible sensor is crafted to maintain the exacting standards expected from Mercedes-Benz, delivering consistent performance and longevity. The TS-556 features a robust **thermistor-based design**, allowing it to provide real-time temperature readings to the vehicle s instrumentation cluster, alerting the driver to potential overheating conditions before they escalate. Its **copper-plated terminals** ensure a secure electrical connection, reducing the risk of corrosion or intermittent signals, while the **durable stainless-steel housing** resists warping and maintains structural integrity under high-temperature and pressure conditions. Ideal for both restoration projects and routine maintenance, this sender is a direct replacement for the factory unit, guaranteeing seamless integration with the original wiring harness and mounting points. Whether used in a classic restoration or as a preventive upgrade, the TS-556 ensures optimal engine protection by accurately reflecting coolant temperature fluctuations, helping to preserve the longevity of the M116 s robust yet temperature-sensitive cooling system.
### Pros and Cons of Buying a Standard TS-556 for a Mercedes-Benz 240D (80-81, Intermotor Engine) Coolant Temperature Sender
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#### **Pros:**1. **Compatibility and Fit:** The TS-556 is a well-documented and widely used replacement part for the coolant temperature sender in the Mercedes-Benz 240D (W123) from the 1980 and 1981 model years, particularly those with the Intermotor engine. It is designed to fit seamlessly into the existing wiring harness and mounting location, reducing the risk of installation errors.
2. **Reliability:** The TS-556 is manufactured by a reputable supplier (TS Electronics) known for producing high-quality automotive sensors. It is built to withstand the operating conditions of the engine, including temperature fluctuations and vibrations, which are common in older vehicles.
3. **Performance:** This sensor provides accurate readings of the engine coolant temperature, which is critical for the proper functioning of the engine management system. Accurate temperature readings help optimize fuel injection, ignition timing, and overall engine performance. This can lead to smoother operation, better fuel efficiency, and reduced emissions.
4. **Ease of Installation:** The TS-556 is designed to be a drop-in replacement, meaning it can be installed without requiring modifications to the vehicle s wiring or mounting points. This makes it an accessible DIY project for those with basic mechanical skills.
5. **Cost-Effective:** Compared to OEM (Original Equipment Manufacturer) sensors, the TS-556 is often more affordable. This makes it a practical choice for budget-conscious owners who want to avoid the higher cost of purchasing an OEM part.
6. **Availability:** The TS-556 is readily available from various online retailers and automotive parts suppliers. This ensures that you can easily source the part without long wait times or difficulty in finding a replacement.
7. **Compatibility with Aftermarket Upgrades:** If you plan to modify your vehicle with aftermarket performance parts (e.g., cold air intake, performance chips, or upgraded injectors), a reliable coolant temperature sender like the TS-556 ensures that these modifications work optimally by providing accurate temperature data to the engine control unit (ECU).
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#### **Cons:**1. **Potential for Counterfeit Parts:** While TS Electronics is a reputable brand, the aftermarket is rife with counterfeit or low-quality knockoffs. Purchasing from untrusted sellers may result in receiving a faulty or incompatible sensor. Always buy from well-reviewed suppliers or authorized dealers to mitigate this risk.
2. **Wiring and Connector Issues:** Although the TS-556 is designed to be compatible, there is a small chance that the wiring harness or connectors in your specific vehicle may not align perfectly with the new sensor. This could require additional soldering, crimping, or the use of electrical tape to secure connections properly.
3. **Limited Longevity:** Like all sensors, the TS-556 is not immune to wear and tear over time. While it is designed to last for the life of the vehicle, factors such as coolant contamination, electrical corrosion, or physical damage could shorten its lifespan. Regular maintenance and periodic inspection are recommended.
4. **Compatibility with Modified Vehicles:** If your 240D has undergone significant modifications (e.g., turbocharging, forced induction, or ECU tuning), the TS-556 may not account for the altered operating parameters. In such cases, you might need to pair it with a compatible ECU tune or additional sensors to ensure optimal performance.
5. **Potential for Incorrect Calibration:** Some aftermarket sensors may not be calibrated to the exact specifications of the original OEM sensor. While the TS-556 is generally well-calibrated, minor discrepancies could affect the accuracy of temperature readings, particularly in extreme conditions (e.g., very cold or very hot temperatures).
6. **Voided Warranty (If Applicable):** If your vehicle is still under warranty (unlikely for a 1980-81 model, but worth noting), installing an aftermarket part like the TS-556 could void any remaining coverage related to the sensor or engine management system.
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### **Conclusion:**The TS-556 coolant temperature sender is an excellent choice for replacing the faulty or worn-out sensor in your Mercedes-Benz 240D (80-81, Intermotor engine) due to its reliability, compatibility, and ease of installation. It offers a cost-effective solution that enhances engine performance and fuel efficiency while being readily available from trusted suppliers. However, potential drawbacks such as the risk of counterfeit parts, minor wiring issues, and the need for regular maintenance must be considered.
For most owners, the benefits of upgrading to the TS-556 far outweigh the cons, provided you purchase it from a reputable source and perform the installation carefully. If you are unsure about any aspect of the installation or compatibility, consulting with a mechanic or an experienced Mercedes-Benz enthusiast can provide additional peace of mind.
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### **Recommendation:**1. **Purchase from a Trusted Supplier:** Buy the TS-556 from a well-reviewed online retailer (e.g., eBay, Amazon, RockAuto, or specialty automotive parts stores) or a local Mercedes-Benz parts dealer. Look for sellers with high ratings and positive feedback to avoid counterfeit or low-quality parts.
2. **Inspect the Sensor Before Installation:** Once you receive the TS-556, visually inspect it for any signs of damage, corrosion, or inconsistencies in the packaging. Ensure that the sensor is properly sealed and that the wiring harness is intact.
3. **Follow Installation Instructions Carefully:** Refer to a detailed installation guide (either from TS Electronics or a trusted online resource) and take your time to ensure that the sensor is securely mounted and that all electrical connections are tight and corrosion-free. If you encounter any difficulties, do not hesitate to seek assistance from a professional.
4. **Test the Sensor After Installation:** After installing the TS-556, start the engine and monitor the coolant temperature gauge on your dashboard. The gauge should respond smoothly and accurately to temperature changes. If the gauge behaves erratically or does not move at all, double-check the wiring and connections.
5. **Monitor Performance Over Time:** Keep an eye on your vehicle s performance in the weeks following the installation. If you notice issues such as rough idling, poor fuel economy, or warning lights on the dashboard, address them promptly to avoid further damage.
6. **Consider Additional Upgrades (If Needed):** If you plan to modify your 240D further (e.g., with a performance chip or turbocharger), research whether the TS-556 is compatible with these upgrades. In some cases, you may need to pair it with a compatible ECU tune or additional sensors for optimal results.
In summary, the TS-556 is a highly recommended replacement for your Mercedes-Benz 240D s coolant temperature sender, provided you take the necessary precautions to ensure its quality and proper installation. With careful attention to detail, it will serve you reliably for many years to come.
Details:
Terminal Type: Pin. Specifications: Attachment Method: Bolt On. Intermotor Engine Coolant Temperature Sender by Standard. Connector Shape: Round.
Connector Gender: Male. Connector Type: Bolt On. Features: In production, all thermal switches are factory-calibrated to make electrical contact at the specified lower-temperature set point. Manufactured from high-strength materials to last.
Connector Quantity: Terminal Gender: Male. Terminal Quantity: 1.
part #: ts556 prices
- $27.97-$47.99
specifications ocoosys:
- for models: 240d
- for makes: Mercedes
- for years: 1980-1981
- brand: Standard
- mpn: Ts-556
- part type: Engine Sender
- product type: Engine Cooling
- upc: 091769833589
- california prop 65 warning: Cancer And Reproductive Harm
- universal fitment: Direct Replacement
- compatible make s : Mercedes-benz
- product subtype: Cooling System Switches, Sensors Relays
- series: Intermotor, Intermotor
- product details: Engine Coolant Temperature Sender
- department: Replacement
returns ocoosys:
- time: 30 Days
- paid by: Seller
- policy: Returns Accepted
general ocoosys:
- condition: New
- Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
payments ocoosys:
- other
- wallet: Paypal
- credit card: Diners-club
seller ocoosys:
- # reviews: 371225
- city: Rockville Centre, New York
- rating: 99.0%
shipping ocoosys:
- transit: 2-6 Days
- type: Calculated
- carrier: FedEx
- cost: $20.77
- class: Standard
- service: FedEx Ground / FedEx Home Delivery
offer ocoosys:
- options: Ship-to-home
- availability: In Stock
- sold: 0
- quantity: 5
- started: May 6, 2026
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