Standard Ignition RU-561 rear blower motor resistor for the 1999-2011 Mercedes-Benz S500 and other vehicles controls the speed settings of the A/C and heater blower motor. It is designed to restore variable speed control, which helps HVAC performance and passenger comfort.
- Copper alloy conductors with minimal resistive losses
- Developed through research and design to work with the vehicle's HVAC system
- Variable speed control for the A/C and heater blower motor
- Tested extensively for durability and longevity
Quick facts
- Part: Standard Ignition RU-561 blower motor resistor
- Also called: HVAC blower motor resistor
- Fits: 1999-2011 Mercedes-Benz S500 and other vehicles
- Position: Rear
- Condition: New
A blower that runs on only some speeds, or not at all, can mean this resistor has worn out, though the blower motor or a fuse may be behind the problem instead, so sort out which one it is before buying a replacement.
Fits
Designed specifically for Mercedes-Benz applications, this resistor is listed for a wide range of the make's models, led by the 1999-2011 Mercedes-Benz S500, the 2010-2014 Mercedes-Benz S400 and the 2007-2014 Mercedes-Benz S550. If your Mercedes-Benz is not one of these, find its year and model in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Rear
- Quantity per vehicle: 1
- Voltage: 12 V
- Number of speeds: 3-5 speed
- Terminals: 5 male blade terminals
- Connector: rectangular, female, 1 cavity
Build and materials
- Conductors: copper alloy
- Attachment method: screw
- Condition: New
- Country of origin: China
In the box
One rear blower motor resistor, and each vehicle takes one. The wiring harness, mounting bracket and mounting hardware are not included, so plan on new screws, as the old ones may not be reusable.
Frequently Asked Questions
Does the Standard Ignition RU-561 fit the 1999-2011 Mercedes-Benz S500?
Yes, Standard Ignition RU-561 is listed for the 1999-2011 Mercedes-Benz S500, and it is a rear unit. For another Mercedes-Benz, look up its year and model in the "Vehicles it fits" section.
Does this rear blower motor resistor come with a wiring harness or bracket?
No. The listing is one resistor; the wiring harness, mounting bracket and mounting hardware are not included, and the vehicle takes one resistor.
How many terminals does the RU-561 blower motor resistor have?
Standard Ignition RU-561 has five male blade terminals in a rectangular female connector. It is a 12-volt unit listed for 3-5 speeds.
What are the signs of a failing HVAC blower motor resistor?
The blower may work on only some fan speeds, or stop responding to the fan control. A shop can test the circuit to confirm what is behind it.
Are the conductors in this blower motor resistor copper?
Yes, the conductors are copper alloy with minimal resistive losses. This resistor also undergoes extensive testing for durability.
