Genuine OEM 0008305784 - HVAC Heater Control Valve

Product Overview

This Genuine OEM 0008305784 HVAC heater control valve is the factory-original component for Mercedes-Benz 190-series vehicles from 1985 to 1993. The heater control valve regulates coolant flow to the cabin heater core, directly controlling interior cabin temperature. This part fits Mercedes-Benz W201 (190D and 190E) models across all gasoline and diesel engine variants, ensuring OEM-spec performance and fitment. As a Genuine OEM part, it carries the same warranty and quality assurance used by Mercedes-Benz dealerships worldwide.

Symptoms of a Failing HVAC Heater Control Valve

• No heat output from cabin vents even after engine warmup
• Inconsistent or weak heating; temperature fluctuates unpredictably
• Coolant leaking from the valve body or hose connections
• Sweet-smelling odor inside the cabin (coolant leak into passenger area)
• Hissing or gurgling sounds from the heater core area during operation

Cross Reference Numbers

This Genuine OEM 0008305784 is equivalent to or replaces the following part numbers: 000-830-57-84, 0008305784.

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 190D 2.2 L5 Diesel (W201): 1985
• Mercedes-Benz 190D 2.5 L5 Diesel (W201): 1986–1989
• Mercedes-Benz 190D 2.5 Turbo L5 Diesel (W201): 1987
• Mercedes-Benz 190E 2.3 L4 Gas (W201): 1985–1988, 1991–1992
• Mercedes-Benz 190E 2.3-16 L4 Gas (W201): 1986–1987
• Mercedes-Benz 190E 2.6 L6 Gas (W201): 1987–1993

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

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Frequently Asked Questions

How do I know if my Mercedes-Benz 190E or 190D heater control valve is failing?

The most common sign is loss of cabin heat despite the engine running at normal operating temperature. You may also notice coolant leaking from under the dashboard or around the valve connections, or experience inconsistent heating that fluctuates without manual adjustment. If your 190-series suddenly loses heat output or produces a sweet smell inside the cabin, the heater control valve is a prime suspect.

What is a heater control valve and how does it work?

The heater control valve is a thermostatic or electronically controlled component that modulates coolant flow from the engine to the cabin heater core. When you adjust the temperature dial, the valve opens or closes to allow more or less hot coolant to pass through the heater core, which then warms air blown into the cabin. Over time, the valve can become stuck, corroded, or develop internal leaks, reducing heating performance.

Is this a Genuine Mercedes-Benz part?

Yes. This OEM 0008305784 is a Genuine Mercedes-Benz factory part, identical to what was installed on your vehicle at the assembly plant. Genuine OEM parts ensure exact fitment, proper function, and compatibility with all other factory systems. This part is commonly stocked by Mercedes-Benz dealerships and carries factory warranty coverage when installed by a qualified technician.

Will this heater valve fit my 1985–1993 Mercedes-Benz 190?

Yes, this part is engineered for all W201 (190-series) models from 1985 through 1993, including both gasoline engines (2.3, 2.3-16, and 2.6 L4/L6) and diesel engines (2.2, 2.5, and 2.5 Turbo L4/L5). Always verify your specific model year and engine type using the vehicle selector tool above before ordering.

What tools and skills are required to replace the heater control valve?

Heater valve replacement typically requires basic hand tools, a drain pan for coolant, and access to the heater plumbing under the dashboard or engine bay. The exact location and difficulty varies by engine type and whether the valve is mounted on the firewall or engine block. Consult your vehicle's service manual or a qualified technician for step-by-step guidance, as improper installation can lead to coolant leaks and loss of heating.

Should I flush my cooling system when replacing the heater valve?

It is recommended to inspect the coolant condition during valve replacement. If the coolant is discolored, rusty, or has not been changed recently, a cooling system flush may be beneficial to remove debris and corrosion that could affect the new valve's performance. Follow your vehicle's maintenance schedule and consult your service manual for recommended coolant type and flush intervals.

Order Genuine OEM 0008305784 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 190.

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.