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Replacing the Window Lifting Mechanism
 
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Pelican Technical Article:

Replacing the Window Lifting Mechanism

Mike Holloway

Time:

1 hour1 hr

Tab:

$50 to $500

Talent:

**

Tools:

10mm, 3-inch extension, Phillips head screwdriver, flathead screwdriver, plastic trim tool

Applicable Models:

Mercedes-Benz R107 (1975-86)

Parts Required:

Window lifting mechanism

Hot Tip:

Wear gloves, there are sharp edges inside

Performance Gain:

Improved operation

Complementary Modification:

Replace the window

Before the window lifting mechanism can be replaced, the door panel must be removed. Replacing the door side panel is a simple task if you use a gentle touch and patience. It is easy to break the clips that hold the panel in place if you use too much force. A trim tool is handy and works best. This job can be accomplished with the plastic trim tool and a small Phillips head screwdriver. On the inside of the door near the catch clasp remove the flash plate by unscrewing the Phillips head screws using a small Phillips head screwdriver. The screws are small and likely to be lost if you do not immediately put them in a small box or baggie. Refer to the article on door panel removal. In order to remove and replace the window lifting mechanism, the window will have to be removed.

Before you do any work on your car it is important that you wear safety glasses, work gloves and dispose of all fluids in a safe manner. Coolant is poisonous and should be treated as such. Animals and small children have been known to die from ingesting coolant. If you have to jack up your car, make sure to use jack stands and chock your wheels as well as applying the parking brake. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability. Always wear eye and hand protection. Disconnect the battery before working on your car.

Before the window lifting mechanism can be removed, the window has to be removed.
Figure 1

Before the window lifting mechanism can be removed, the window has to be removed. Using a flathead screwdriver, gently lift the seal trim from the doorframe. Use care so as not to bend the clips. They are easy to break and difficult to source.

The door seal will have to be moved to one side in order to be able to remove the window.
Figure 2

The door seal will have to be moved to one side in order to be able to remove the window. Again, use care when moving the seal material so as not to tear it.

It is advisable to clamp the window in place in order to ensure the window does not fall.
Figure 3

It is advisable to clamp the window in place in order to ensure the window does not fall.

Using a 10mm socket with a 3-inch extension, loosen and remove the lower fastening bolts of the window guide.
Figure 4

Using a 10mm socket with a 3-inch extension, loosen and remove the lower fastening bolts of the window guide.

Be careful not to drop the window stay clip into the door.
Figure 5

Be careful not to drop the window stay clip into the door.

Using a 10mm socket with a 3-inch extension, loosen and remove the upper fastening bolts from the window.
Figure 6

Using a 10mm socket with a 3-inch extension, loosen and remove the upper fastening bolts from the window. This is located above the actuator.

This will also have a stay clip.
Figure 7

This will also have a stay clip.

Move the window down until you see the last clip that is in place.
Figure 8

Move the window down until you see the last clip that is in place. This can be removed through the large opening in the door. This clip has to be removed in order for the window to slip out.

Remove the spring clip and flashing from the side of the door.
Figure 9

Remove the spring clip and flashing from the side of the door. The flashing will slide up.

Push the window slightly to the front of the car then slip it backwards through the open where the flashing was.
Figure 10

Push the window slightly to the front of the car then slip it backwards through the open where the flashing was. It may take a little maneuvering but it will slide out.

Using a 10mm socket, remove the 5 nuts securing the lifting mechanism to the doorframe.
Figure 11

Using a 10mm socket, remove the 5 nuts securing the lifting mechanism to the doorframe. There will be two pairs located near the window motor and one on the far end above the lock actuator.

Disconnect the lead from the window motor.
Figure 12

Disconnect the lead from the window motor.

Using a 10mm socket, loosen and remove the three screws that are holding the window motor in place.
Figure 13

Using a 10mm socket, loosen and remove the three screws that are holding the window motor in place.

The lifting mechanism can slip through the large opening in the doorframe.
Figure 14

The lifting mechanism can slip through the large opening in the doorframe.

The lifting mechanism is now free to be replaced.
Figure 15

The lifting mechanism is now free to be replaced. 
Installation is the reverse of removal. Refer to the article on window adjustment when replacing the window.

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Page last updated: Wed 12/7/2016 02:51:03 AM