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Pelican Technical Article:

Door Glass Adjustment

Mike Holloway

Time:

1 hour1 hr

Tab:

$0

Talent:

*

Tools:

10mm Socket, 5mm Allen wrench, plastic trim prying tool, small Phillips screwdriver

Applicable Models:

Mercedes-Benz 450SL (1975-80)

Hot Tip:

Careful not to tear plastic liner sheet

Performance Gain:

Proper window closure

Complementary Modification:

While panel is off, lubricate window mechanism

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.

Over time, your side window may get out of alignment producing a whistling at speed or allowing weather to enter. Before the window can be adjusted, 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 a 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.

Using a 10mm socket wrench, loosen the two guide bracket nuts on the door panel located opposite to the side mirror.
Figure 1

Using a 10mm socket wrench, loosen the two guide bracket nuts on the door panel located opposite to the side mirror. Apply force to mate the window to the edge. Tighten the nuts.

With the window up, make sure the front edge of the window is aligned with the front guide bracket.
Figure 2

With the window up, make sure the front edge of the window is aligned with the front guide bracket. You can adjust the window by loosening the two screws that secure the window-lifting rail. Use a 10mm socket to loosen, shift the window and then tighten.

You may also find it necessary to loosen the rear regulator mounting screw.
Figure 3

You may also find it necessary to loosen the rear regulator mounting screw. You will want to make sure there is a little pressure from the window on the front seal when the door is closed. You may have to open and close the door after each adjustment. Tighten the screws.

To adjust the lateral position of the window, loosen the two Allen screws in the door edge.
Figure 4

To adjust the lateral position of the window, loosen the two Allen screws in the door edge. You will need a 5mm Allen wrench. Loosen the top one.

The bottom one will have a plastic cover over it.
Figure 5

The bottom one will have a plastic cover over it. Remove the cover.

Loosen the bottom Allen screw.
Figure 6

Loosen the bottom Allen screw. Adjust the lateral movement so when the door is closed but not latched the window makes slight contact with the seal of the upper front edge of the frame. When the door is completely closed the entire window should press against the entire seal. Tighten the Allen screws as well as the other bolts.

Be careful not to loosen it all the way and drop it into the door.
Figure 7

Be careful not to loosen it all the way and drop it into the door. But if you do, use a magnetic retriever to pull it out. 
Replace the door panel. Installation is the opposite of removal. 

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Page last updated: Sat 12/3/2016 02:51:00 AM