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Pelican Technical Article:

Rear Wiper Relay Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$60

Talent:

**

Tools:

Philips head screwdriver, trim removal tool

Applicable Models:

Mercedes-Benz W124 (1986-95)

Parts Required:

New rear wiper motor, nozzle, arm and wiper blade

Hot Tip:

Always lever the panel off gently

Performance Gain:

See out rear window

Complementary Modification:

Replace wiper blade

If your rear windshield wiper has stopped working the second place you should check (after the fuse) is the relay. The relay is easy to access and you do not need to remove the entire rear hatch panel.

Begin by opening the hatch and removing the nine plastic screw pull tabs (red arrows).
Figure 1

Begin by opening the hatch and removing the nine plastic screw pull tabs (red arrows).

The plastic screws unscrew with a Philips head screw driver then the base of the plug pulls out from the hole in the hatch.
Figure 2

The plastic screws unscrew with a Philips head screw driver then the base of the plug pulls out from the hole in the hatch.

With all the tabs removed the panel will come off the lower section of the hatch and free up the bottom of the panel.
Figure 3

With all the tabs removed the panel will come off the lower section of the hatch and free up the bottom of the panel.

Use a trim removal tool and gently pry the two plastic clips on the left side of the panel away from the hatch (red arrows).
Figure 4

Use a trim removal tool and gently pry the two plastic clips on the left side of the panel away from the hatch (red arrows).

You can move the panel back far enough to access the relay (red arrow) which is located in an access hole in the frame of the hatch.
Figure 5

You can move the panel back far enough to access the relay (red arrow) which is located in an access hole in the frame of the hatch.

The replay pulls straight up and out from its mount in the hatch.
Figure 6

The replay pulls straight up and out from its mount in the hatch. Installation is the reverse of removal.


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