Genuine OEM 2762000515 - Engine Coolant Thermostat Kit

Product Overview

This Genuine OEM 2762000515 engine coolant thermostat kit is designed for Mercedes-Benz vehicles equipped with the 3.5L V6 naturally aspirated engine. The thermostat regulates engine coolant temperature to maintain optimal operating conditions and fuel efficiency. This kit fits C-Class, E-Class, GLK-Class, ML-Class (renamed GLE-Class in 2016), R-Class, and SLK-Class models from 2012 to 2018, spanning the W204, W212, X204, W166, W251, and R172 chassis platforms. As a Genuine OEM part, it meets factory specifications and carries the confidence of Mercedes-Benz engineering.

This thermostat kit is sold as a complete replacement unit. One kit per vehicle is required for a full cooling system service.

Symptoms of a Failing Engine Coolant Thermostat

• Engine running too hot or temperature gauge reading higher than normal
• Engine running too cold and slow to reach operating temperature
• Erratic temperature gauge fluctuations while driving
• Coolant leaks around the thermostat housing or water outlet
• Overheating during city driving or idle conditions
• Dashboard warning light for coolant temperature or engine temperature

Cross Reference Numbers

This Genuine OEM 2762000515 is equivalent to or replaces the following part numbers: 2762000515, 276-200-05-15.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• Mercedes-Benz C300 3.5 V6 Gas (W204): 2013–2014
• Mercedes-Benz C350 3.5 V6 Gas (W204): 2012–2015
• Mercedes-Benz E350 3.5 V6 Gas (W212): 2012–2015
• Mercedes-Benz E400 Hybrid 3.5 V6 FHEV (W212): 2013–2015
• Mercedes-Benz GLK350 3.5 V6 Gas (X204): 2013–2015
• Mercedes-Benz GLE350 3.5 V6 Gas (W166): 2016–2018
• Mercedes-Benz ML350 3.5 V6 Gas (W166): 2012–2015
• Mercedes-Benz R350 3.5 V6 Gas (W251): 2012
• Mercedes-Benz SLK350 3.5 V6 Gas (R172): 2012–2016

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete cooling system service, many owners replace the following at the same time:

• Engine coolant (flush and fill with Mercedes-Benz approved coolant)
• Coolant hoses and clamps (inspect for cracks or deterioration)
• Water pump (if mileage is high or pump shows signs of wear)
• Radiator cap (part of routine cooling system maintenance)

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Frequently Asked Questions

How do I know if my Mercedes-Benz W204 C-Class or W212 E-Class thermostat is failing?

The most common sign is the engine taking much longer than usual to warm up, or conversely, running hotter than normal. You may also notice the temperature gauge fluctuating erratically while driving, or the engine overheating during stop-and-go traffic. Some owners report coolant leaks around the thermostat housing. If you see the coolant temperature warning light on your dashboard, have the cooling system inspected immediately.

What is the difference between a thermostat and a thermostat kit?

A thermostat kit typically includes the thermostat valve itself, the housing, gaskets, seals, and sometimes coolant outlet fittings. This complete assembly approach simplifies installation and ensures all sealing surfaces are fresh, reducing the risk of coolant leaks after service. Replacing only the thermostat element without the housing and gaskets can lead to incomplete cooling system repair.

Can I replace the thermostat myself, or do I need a professional?

Thermostat replacement is a moderately involved job that requires draining coolant, removing hoses, and carefully reinstalling new gaskets and seals. You will need basic hand tools, a drain pan, and a torque wrench to ensure proper fastener tightness. If you are comfortable working with cooling systems and have the proper tools, a DIY approach is feasible. However, professional installation is recommended if you are unfamiliar with coolant system work, as improper reassembly can lead to leaks or air pockets in the cooling system.

Should I flush my cooling system when I replace the thermostat?

Yes, it is good practice to flush the cooling system when replacing the thermostat. Over time, coolant degrades and can accumulate sediment and rust particles. A complete flush removes these contaminants and allows you to refill with fresh Mercedes-Benz approved coolant, which will extend the life of the new thermostat and other cooling components.

What coolant should I use in my Mercedes-Benz after replacing the thermostat?

Always use Mercedes-Benz approved coolant for your vehicle. The specific type depends on your model year; consult your owner's manual or the service label under the hood for the exact specification. Using the wrong coolant type can cause corrosion and reduced cooling efficiency. Never mix different coolant brands or types.

How long does a thermostat typically last on a Mercedes-Benz?

Thermostats typically last 80,000 to 150,000 miles, depending on driving conditions, coolant quality, and maintenance history. Regular coolant flushes and using the correct coolant type help extend thermostat life. If your vehicle has high mileage or shows cooling system symptoms, replacement is a cost-effective preventive maintenance step.

Order Genuine OEM 2762000515 today. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your Mercedes-Benz.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.