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S-Class Mercedes Benz Blower Motor Replacement W221

DIY Cost: $150-$680
Est. Time: 45 minutes
Difficulty: Intermediate


This guide provides step-by-step instructions on how to replace the blower motor on a Mercedes Benz S-Class W221.


  • The defective aircon blower motor is weaker than usual,
  • No airflow from the vents,
  • Fan not working at all speeds,
  • No airflow from the vents.

What you will need




  1. Locate the panel under the glove compartment on the front passenger side of the car.blower-assembly-location


  2. Loosen and remove three (3) T25 screws using a Torx screwdriver.loosen-screws1


  3. Pull the panel down and remove the electrical connection for the night light.Pull-panel-down remove-electrical-connector


  4. Bend down and pull out the panel.bend-pull-panel


  5. The blower motor housing is now visible; detach the blower's electrical connection by pushing the connector's tab using your fingers or using a thin flat-head screwdriver. You may use your finger or a small screwdriver to push the tab.blower-motor-housing push-connector-tab-using screwdriver remove-connector-by-fingers


  6. Detach the blower from the frame by removing five (5) screws using a Torx screwdriver with T-handle. Please look at the blower motor housing's different perspectives to find the location of the screws.blower-motor-backview blower-motor-belly-view


  7. Pull the blower housing down.pull-housing-down


  8. Take note of the orientation of the two big blind holes on the blower housing; these are oriented towards the driver side.blower-orientation


  9. Remove the screws that attach the blower resistor module to the blower motor housing using a T20 screwdriver.remove-screw-from-module detach-module-from-housing


  10. Push wires out of the way, move the blower resistor module up and down while pulling it towards you in a diagonal direction until the lock release.remove-module


  11. Disconnect blower wires from the blower resistor module by pulling the connector while pressing the tab (lock).remove-module-connector


  12. Prepare the new blower motor.
  13. Connect the blower resistor module to the new blower motor assembly. Be sure to push the module until it sits on the lock at the bottom side of the blower housing.reinstall-module blower-locked


  14. Reinstall T20 blower resistor module screws using a Torx screwdriver.reinstall-with-screw-driver


  15. Verify the blower resistor module installation.verify-module


  16. Install the new blower motor assembly (housing) to the frame by pushing it up while reinstalling the screws.reinstall-blower-assembly
  17. Reconnect the blower's electrical connector by pushing it until it clicks.reconnect-assembly-connector


  18. Reposition the panel.
  19. Reconnect the electrical connection for the dome light.reconnect-dome-light


  20. Fit the panel in place while locking the tabs and re-install t25 screws for the


Frequently Asked Questions


Can AC run without a blower motor?

  • A blower motor is an essential part of the car's air conditioning system; without the blower motor, the cold air will be limited to the evaporator and will not circulate thru the car's cabin. 

What can cause a blower motor to stop working?

  • The blower motor may not work due to a faulty A/C module, blown a fuse, dirty blower fan, and a worn-out motor.

How much does it cost to replace a Mercedes Aircon blower motor?

  • The average cost for a Mercedes-Benz blower motor replacement is between $680 and $703. Labor costs are estimated between $90 and $114, while parts are priced at $589. 

How long will it take to replace my HVAC blower motor?

  • This is one of the easier jobs you can tackle on your car. If you're doing this for the first time, you can expect to spend between 30 to 45 minutes to complete it.   


S-Class W221

  • S 280 / S 300    2007–2013
  • S 350    2005–2009
  • S 350 (2010+ facelift)    2010–2013
  • S 350 4MATIC    2007–2013
  • S 450, S 450 4MATIC    2006–2013
  • S 500/550    2005–2010
  • S 500/550    2011–2013
  • S 500/550 4MATIC    2006–2011
  • S 500/550 4MATIC    2011–2013
  • S 600, S 600 Guard    2006–2013
  • S 600 Guard Pullman    2008–2013
  • S 63 AMG    2006–2011
  • S 63 AMG    2012–2013
  • S 65 AMG    2006–2013
  • S 250 / S 300 CDI    2009–2013
  • S 300 BlueTec HYBRID    2009–2010
  • S 320 CDI, S 320 CDI 4MATIC    2006–2008
  • S 320 CDI BlueEFFICIENCY    2008–2009
  • S 350 CDI BlueEFFICIENCY, S 350 CDI 4MATIC    2009–2013
  • S 350 4MATIC BlueTec (US)    2012–2013
  • S 420 CDI    2006–2009
  • S 450 CDI    2009–2011

This guide also applies to the CL-Class. 

Additional Photos

W221 blower motor not workingblower motor


blower motor


S-Class Mercedes Benz Blower Motor Replacement W221 Symptoms The defective aircon blower motor is weaker than usual, No airflow from the vents, Fan not working at all speeds, No airflow from the vents. What you will need Parts Mercedes Benz Blower Motor Tools