Mercedes W204 W207 W245 Thermostat Oil Cooler Radiator A0005010765

Mercedes W204 W207 W245 Thermostat Oil Cooler Radiator is a specialized component of the lubrication system, responsible for controlling engine oil temperature and ensuring stable operation of the power unit. Thanks to precise control of oil flow through the cooler, this thermostat supports safe engine operating conditions across a wide range of loads. This solution is designed for users who expect a proven, factory-spec design tailored to Mercedes compact and mid-size models.

Specifications and technical data

• SKU: A0005010765
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0005010765
• Substitutable numbers: A0005010765, A 000 501 07 65, A0005010665, A 000 501 06 65, A1645010065, A 164 501 00 65
• Category: Engine Oil Coolers & Lines

Function of the oil cooler thermostat in a Mercedes

The oil cooler thermostat in Mercedes vehicles is responsible for directing the oil flow to the cooler or bypassing it, depending on the current operating temperature. During the engine warm-up phase, the oil reaches optimal viscosity parameters faster, and once a specific threshold is exceeded, the thermostat opens the flow through the cooler, reducing the risk of overheating. A properly functioning component of this type contributes to:

• maintaining a stable oil temperature during city and highway driving,
• reducing thermal loads on engine components,
• more uniform lubrication across the entire RPM range,
• extending the service life of the power unit during intensive use.

Purpose and compatibility with Mercedes models

The presented thermostat is structurally prepared to work with the oil cooling system in selected Mercedes W204, W207, and W245 models. This means maintaining factory connection geometry, proper positioning in the system, and compatibility with the original oil cooler and lines. As a result, installation is similar to replacing a factory part, without the need for system modifications.

The element belongs to the Oil coolers and lines group, which facilitates the selection of other lubrication and cooling system components during major repairs or upgrades. Using the original design allows for maintaining the operating parameters specified by the vehicle manufacturer.

Benefits of using an original thermostat

Using a dedicated oil cooler thermostat in a Mercedes brings measurable operational benefits. The lubrication system works in a predictable manner, and the oil temperature is maintained within a range that is beneficial for both engine protection and efficiency. The most important advantages include:

• Stable engine operating conditions – limiting oil temperature spikes during dynamic driving and high loads.
• Better protection of moving parts – lower risk of oil degradation and loss of lubricating properties.
• Consistency with the factory system design – maintaining flow parameters and opening characteristics in accordance with the manufacturer's specifications.
• Possibility of effective diagnostics – a system built on original components is easier to assess for potential faults.

Condition, origin, and practical application

The offered thermostat comes from a Mercedes vehicle and is a secondary market component, which allows for economical repair while maintaining the factory design. For workshops and individual users, this means the ability to restore the proper operation of the oil cooling system without having to resort to replacements with unknown characteristics. Replacing the thermostat is particularly recommended in situations where fluctuations in oil temperature, engine overheating, or excessively long engine warm-up times are observed.

To better understand the impact of an efficient cooling system on the durability of the power unit, it is worth reading the guide on diagnostics and operation described in the article Engine cooling system – overheating, repair, and used radiators. It allows you to link the operation of the oil cooler with the general condition of the engine in various car models.

Expanding the oil cooling system in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional oil coolers, oil lines, or lubrication system connectors, check the available parts in the Mercedes oil coolers and lines category.

For users interested in combining engine performance care with reducing environmental impact, the material describing the use of recycled parts in tuning and service may also be helpful – more information can be found in the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts.