Is your Mercedes-Benz engine running hot because of a faulty radiator fan? Learn how to fix the problem by replacing the cooling fan of your Mercedes-Benz radiator. Most of the pictures in this guide are from a CLS-Class, but these instructions apply to an E-Class.  Replacing the cooling fan on a Mercedes-Benz is easy and takes about one hour.


Symptoms of a bad cooling fan include:

  • The cooling fan does not work, engine overheats
  • Warning message on dashboard
  • The cooling fan runs full speed due to a faulty controller

What you will need

  • Mercedes Cooling Fan
  • Screwdriver
  • Work gloves
  • T25 Torx
  • 10mm wrench


  1. Park the vehicle and allow it to cool down.
  2. Pull the hood release and open the hood.
  3. Pry out the two plastic pins at each end of the top radiator bracket.
top radiator bracket

4. Remove the upper radiator support.

Mercedes top radiator support bracket removal

It is held in place with three T25 bolts on each side. On some models, such as CLS and CLK, you may also need to remove the front grill.

5. Disconnect the wires from the horn

disconnect mercedes horn

6. Remove the top radiator support bracket.

Remove Mercedes Top Radiator Bracket

7. Carefully release the hood release cable from the top bracket. It is clipped to the bottom of the top radiator bracket.

hood cable

Press the connector and pull it to disconnect it.

8. Locate the electrical connector on the back of the cooling fan. Press the connector and pull it to disconnect it.

Mercedes Cooling Fan Connector

9. Remove two U clips at each top corner of the radiator.

Mercedes Coolaing Fan Brackets

These clips can be easily removed by prying them up with a screwdriver.

Mercedes Cooling Fan U clip removed

10. Slide the radiator cooling fan up.

Mercedes cooling fan removed

Look at the back of the cooling fan for hoses that may prevent it from coming up. If any of the hoses prevent the fan from moving up, move the hoses out of the way. At the bottom, the cooling fan simply slides into two channels.

11. Reinstall the new cooling fan in reverse order. Make sure that the cooling fan is engaged at the bottom.

These instructions should help you replace the radiator cooling fan on Mercedes-Benz models such as C, S, ML, GL, GLK, GLE, GLS, etc.

We hope you find the Mercedes-Benz Radiator Cooling Fan Replacement | DIY guide helpful. Check these troubleshooting and repair guides for more help on your Mercedes-Benz.

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