Dorman 973-103 HVAC Blower Motor Resistor - Center or Rear

Mercedes-Benz HVAC Blower Motor Resistor Replacement

Restore proper cabin airflow control with this Dorman HVAC blower motor resistor, part number 973-103. It is a direct replacement for select Mercedes-Benz models and is built to match original equipment operation and performance for rear and center climate control applications.

Key Features

• Direct replacement HVAC blower motor resistor for select Mercedes-Benz vehicles
• Matches OE operation and performance for consistent fan-speed control
• 5-terminal, blade-style electrical connection with 1 rectangular female connector
• 2 bolt-hole mounting design for secure installation
• Fits rear and center HVAC locations depending on application
• Cross-references Mercedes-Benz OE and aftermarket numbers 2208209210 and RU561

Detailed Description

Dorman 973-103 is an HVAC blower motor resistor designed for Mercedes-Benz S-Class, C-Class, CLK-Class, and ML-Class applications with automatic climate control configurations. It regulates blower motor speed by controlling electrical resistance, helping the HVAC system deliver the correct fan output for heating and cooling. This part number 973-103 is a practical OE-style replacement when the original resistor has failed or the blower speeds no longer respond correctly.

Compatible With Mercedes-Benz models including S350, S400, S550, S600, S63 AMG, S65 AMG, S450, S430, S500, S55 AMG, C230, C240, C280, C320, C350, C55 AMG, CLK320, CLK500, CLK55 AMG, ML320, ML350, ML500, and ML55 AMG. Fits 1998-2013 Mercedes-Benz vehicles in rear or center HVAC positions, depending on model and climate control setup. If you are searching for a Mercedes-Benz blower motor resistor 973-103 or a replacement for a failed rear climate control resistor, this part matches the listed applications.

What It Helps Fix

• Blower motor stuck on one speed
• No cabin fan operation at certain settings
• Intermittent HVAC fan speed control
• Weak or inconsistent heating and cooling airflow
• Burnt or failed blower resistor causing loss of climate control function

Installation Notes and Tips

Verify the connector style, terminal count, and mounting points before installation. This resistor uses a female rectangular connector with blade terminals and does not include a wiring harness or mounting hardware. Confirm whether your vehicle uses a rear or center HVAC location, since fitment varies by model and climate control configuration. Inspect the blower motor and related wiring for heat damage before installing the new resistor.

Quality Assurance

Dorman designs this replacement resistor to match the operation and performance of the original equipment on the listed Mercedes-Benz applications. Part number 973-103 is built for direct-fit service on confirmed fitments and supports reliable HVAC fan-speed control.