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Window and Mirror Switch Replacement
 
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Pelican Technical Article:

Window and Mirror Switch Replacement

Steve Vernon

Time:

2 hours2 hrs

Tab:

$110

Talent:

**

Tools:

Trim removal tool, T30, T10 Torx driver

Applicable Models:

Mercedes-Benz C250 (2012-14)
Mercedes-Benz C300 (2008-14)
Mercedes-Benz C350 (2008-14)

Parts Required:

Switch module

Hot Tip:

Pry as close to the door clips as possible

Performance Gain:

Working windows

Complementary Modification:

Detail the interior

There is a singular module in the driver side door that controls the four windows, window locks and the rearview mirrors. Over time these switches will wear out and break or the coating on the switches can wear off leaving them pretty ratty looking for the interior of a Mercedes. This article will show you how to replace this switch module. If you are having problems with the switch on the passenger side the procedures are the same.

Over time the window and mirror control switch module will either break or the covering on the switches themselves gets really tattered looking.
Figure 1

Over time the window and mirror control switch module will either break or the covering on the switches themselves gets really tattered looking. The switches are all in one module and you must remove the door panel to replace them.

When removing the door panel begin by placing the window in the lowest position it will go (green arrow).
Figure 2

When removing the door panel begin by placing the window in the lowest position it will go (green arrow). There are two trim pieces you will need to move/remove before removing the panel. One is the window trim piece where it meets the door panel (red arrow), and the other is the triangular speaker cover by the A-pillar (yellow arrow).

There is a fastener under the window trim piece that you will need access to.
Figure 3

There is a fastener under the window trim piece that you will need access to. Use a trim removal tool and separate the trim piece from the weather stripping on the outside of the doorframe (red arrow).

With the trim piece out of the weather strip channel use your trim tool and separate the piece (red arrow) from the doorframe.
Figure 4

With the trim piece out of the weather strip channel use your trim tool and separate the piece (red arrow) from the doorframe. You can now access the fastener (yellow arrow). This fastener has varied over the years from a clip to a T30 Torx screw.

Next remove the triangular cover by prying it out from the area around the mirror.
Figure 5

Next remove the triangular cover by prying it out from the area around the mirror. If yours has been removed before you can probably do this with your hands. If not use your trim removal tool (red arrow).

With the section around the mirror loose push the piece forward (red arrow) and out from the door.
Figure 6

With the section around the mirror loose push the piece forward (red arrow) and out from the door. The piece can just hang by the small speaker wire or you can disconnect it.

Use a T30 Torx and remove the three T30 Torx bolts.
Figure 7

Use a T30 Torx and remove the three T30 Torx bolts. One bolt is under the trim piece you removed and two are below the armrest (red arrows).

There are nine clips (red arrow) that hold the door panel in place.
Figure 8

There are nine clips (red arrow) that hold the door panel in place. Some of these clips might break or stay in the door when you are removing the panel. You want to use the proper door panel trim removal tool and get as close to the clips as possible. Prying them out will take a surprising amount of force. You want to avoid having the plastic section of the panel that holds the clips break. Also, do not pull on the panel with your hands, as you risk bending or damaging the panel itself.

This photo shows the approximate location of the clips and where you want to insert the tool.
Figure 9

This photo shows the approximate location of the clips and where you want to insert the tool. Make sure the tool is seated around the clip before prying on it.

With all the clips free you want to lift the panel up and out from the channel on the top of the door (red arrow).
Figure 10

With all the clips free you want to lift the panel up and out from the channel on the top of the door (red arrow). The door lock pull will stay on the door so you will have to lift the panel over it.

Tilt the panel towards yourself and slide the door pull cable (red arrow) out from the support in the door panel (yellow arrow).
Figure 11

Tilt the panel towards yourself and slide the door pull cable (red arrow) out from the support in the door panel (yellow arrow). Unhook the Bowden cable from the handle (green arrow).

The panel will still be connected to the door by the electrical connections.
Figure 12

The panel will still be connected to the door by the electrical connections. On our vehicle we unplugged the two connections by pressing in the tabs and separating them (red arrows).

The door panel is not free and can be safely removed.
Figure 13

The door panel is not free and can be safely removed. If you are lying it down to work on it make sure to put something down first to avoid damaging the interior trim. This photo shows the location of the clips (yellow arrows). You can see how two of them (red arrows) stayed in the doorframe when we removed the panel.

If the clips have not broken you can just pry them out of the door and reinsert them into the panel.
Figure 14

If the clips have not broken you can just pry them out of the door and reinsert them into the panel. It is a good idea to order a few spare clips before you begin in case you damage a few so you will not be hung up upon reassembly waiting for clips.

The window switch module is screwed into a heat-molded section of the door (red arrow).
Figure 15

The window switch module is screwed into a heat-molded section of the door (red arrow). Press in the small tab on the electrical connection and pull it out from the module (yellow arrow).

Use a T10 Torx and remove the four small Torx screws holding the module in place (red arrows).
Figure 16

Use a T10 Torx and remove the four small Torx screws holding the module in place (red arrows). If the switch module has never been removed you may need to help get it out by pushing against the back with your Torx driver.

The module will come out the front of the door panel and is replaced as a complete unit.
Figure 17

The module will come out the front of the door panel and is replaced as a complete unit. Installation is the reverse of removal.

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