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Pelican Technical Article:

Radiator Fan Replacement

Steve Vernon

Time:

2 hours2 hrs

Tab:

$670

Talent:

**

Tools:

10mm socket, T10 Torx, flathead screw driver, trim removal tool

Applicable Models:

Mercedes-Benz W204 (2008-15)

Parts Required:

Fan and shroud

Hot Tip:

Be careful working around the radiator

Performance Gain:

Proper engine temperature

Complementary Modification:

New radiator

The radiator fan and shroud assembly for the Mercedes-Benz W204 is only sold as a set and is not cheap. Make sure you have checked all your electrical issues (fuses and connections) before you order a new fan assembly. The removal and installation itself is not difficult. Just be careful working around the radiator, as you do not want to damage it.

You need to remove several components to replace the radiator fan, starting with the front engine cover (red arrow) and the two air ducts (green arrows).
Figure 1

You need to remove several components to replace the radiator fan, starting with the front engine cover (red arrow) and the two air ducts (green arrows). You do not need to remove the rear engine cover (yellow arrow). Please see our article on engine cover removal for additional information.

Next remove the front under engine tray.
Figure 2

Next remove the front under engine tray. Please see our article on underbody tray removal for further assistance.

There is a plastic piece that connects the fan shroud to the lower air dam.
Figure 3

There is a plastic piece that connects the fan shroud to the lower air dam. Gently separate the plastic clips on the lower section (green arrows) from the shroud (red arrows) and pivot it down.

Use a T10 Torx and remove the screw holding the transmission cooler lines from the right side of the shroud (red arrow).
Figure 4

Use a T10 Torx and remove the screw holding the transmission cooler lines from the right side of the shroud (red arrow).

Move to the top of the car.
Figure 5

Move to the top of the car. You are going to remove the three trim pieces on the front (red arrows).

The two sidepieces over the headlight assemblies have two push/pull pins.
Figure 6

The two sidepieces over the headlight assemblies have two push/pull pins. Use a trim removal tool and pry out the pin from the base (red arrow).

With the two-push/pull pins removed (red arrows) you can lift the piece up and slide it out from the center piece (yellow arrow).
Figure 7

With the two-push/pull pins removed (red arrows) you can lift the piece up and slide it out from the center piece (yellow arrow). The procedure is the same for both sides.

On the center piece begin by removing the overflow hose and hood release cable from their mounts (red arrow).
Figure 8

On the center piece begin by removing the overflow hose and hood release cable from their mounts (red arrow). Next turn the plastic tab on the center front of the piece 90 degrees to release it. Now pull back on the two areas indicated with green arrows while lifting the piece up from the rear.

Use a flathead screwdriver and pry out the radiator plugs (red arrow, one on each side) from the center piece.
Figure 9

Use a flathead screwdriver and pry out the radiator plugs (red arrow, one on each side) from the center piece.

You can turn the plastic piece on the top of the plug or gently pry it up (red arrow) and then remove the entire plug from the radiator.
Figure 10

You can turn the plastic piece on the top of the plug or gently pry it up (red arrow) and then remove the entire plug from the radiator.

Use a 10mm socket and remove the ten 10mm bolts holding the center piece in place (red arrows) and remove the piece.
Figure 11

Use a 10mm socket and remove the ten 10mm bolts holding the center piece in place (red arrows) and remove the piece.

Reach down the left side of the radiator and disconnect the wiring plug from the fan shroud (red arrow).
Figure 12

Reach down the left side of the radiator and disconnect the wiring plug from the fan shroud (red arrow). Make sure to clip any zip ties holding the wiring to the shroud.

There is a rubber seal used that is attached to the top of the shroud.
Figure 13

There is a rubber seal used that is attached to the top of the shroud. Use a trim removal tool and unclip it from and slide it out of the top of the shroud (red arrows).

Release the clips on each side of the shroud to radiator mounts (red arrow).
Figure 14

Release the clips on each side of the shroud to radiator mounts (red arrow).

Carefully lift the radiator fan and shroud out from the front.
Figure 15

Carefully lift the radiator fan and shroud out from the front. Use care, as you make sure the clips on the side of the shroud clear everything as it comes out.

Here is a photo of the shroud out of the vehicle; you can see the clips on the side that sit in corresponding mounts on the radiator.
Figure 16

Here is a photo of the shroud out of the vehicle; you can see the clips on the side that sit in corresponding mounts on the radiator. Make sure all of these clips line up when installing the new fan. Installation is the reverse of removal.

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