I am replacing a rear. Quarter panel in a 2010 Mercedes Benz model glk350 and I need to remove the quarter panal glass how do I remove the quarter panel glass

This video is not on an Impala, but a quarter window is a quarter window. It should give you an idea of what needs to be done.
How to Replace Quarter Window

Remove the door opening weather-strip. Refer to Door Opening Weatherstrip Replacement in Doors.
Remove side sill trim plate. Refer to Door Sill Plate Replacement in Interior Trim.
Remove the lower quarter panel trim. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.
Remove the center pillar upper trim panel. Refer to Center Pillar Upper Trim Panel Replacement in Interior Trim.
Remove the quarter upper trim panel. Refer to Rear Quarter Upper Trim Panel Replacement in Interior Trim.
Remove the center pillar outer applique. Refer to Center Pillar Applique Replacement in Exterior Trim.
Remove the roof drip molding. Refer to Body Side Roof Drip Molding Replacement in Exterior Trim.

Important: It is necessary to use new nuts when reinstalling the quarter window.
Remove the nine quarter window nuts (1), securing the quarter window assembly (2) to the body opening.
Caution: When working with any type of glass or sheet metal with exposed or rough edges, wear approved safety glasses and gloves in order to reduce the chance of personal injury.
Important: When removing the quarter window from the body opening make sure that the attaching pins are clear of the outer body.
Remove the quarter window (2) from the body opening.

Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement in Seats.
Remove the rear seat back. Refer to Rear Seat Back Replacement in Seats.
Remove the door sill plate. Refer to Door Sill Plate Replacement .

Remove the 3 quarter trim panel retaining screws (1).
Starting at the lower edge of the trim panel and moving alternately clockwise and counterclockwise, pull outward on the trim panel to disengage the eight rear quarter trim panel attaching clips (2).
Remove the quarter trim panel from the vehicle.
Remove the 4 radio speaker grille speed clips (1), securing the speaker grille.
Remove the speaker grille (2).
Remove the rear quarter trim panel insulator (1), from the back of the quarter trim assembly (2).
Remove 7 rear quarter trim panel armrest retaining clips (1).
Remove 7 rear quarter trim panel armrest retaining nuts (2).
Gently pry the quarter trim panel armrest insert assembly (3), away from the rear quarter trim panel and remove.

You mite look for a video on youtube !

REMOVAL

(1) Remove quarter trim panel.

(2) Remove the bolts attaching the latch to the cab

side panel.

(3) Remove the nuts attaching the frame/hinge to

the B-pillar.

(4) Remove the glass from the cab.
(5) If necessary, remove the latch from the glass.

INSTALLATION

(1) If removed, install the latch to the glass.

(2) Center the window glass at the opening, insert

the hinge studs in the B-pillar holes, and install the

nuts.

(3) Attach the latch to the rear side panel with the

bolts. Tighten the bolts with the latch in the lock

position and pushing rearward on the latch.

(4) Test the vent window for water leaks.
(5) Install quarter trim panel.

INSTALLATION

(1) If removed, install the latch to the glass.

(2) Center the window glass at the opening, insert

the hinge studs in the B-pillar holes, and install the

nuts.

(3) Attach the latch to the rear side panel with the

bolts. Tighten the bolts with the latch in the lock

position and pushing rearward on the latch.

(4) Test the vent window for water leaks.
(5) Install quarter trim panel.

Most cars have "pry off" spring button connectors see u-tube

needs to be replaced seats out covers out at quarter glass area

from autozone.com:

Removal & Installation

1. Disconnect and isolate the negative battery cable.
2. Remove the right quarter trim panel as follows:
   1. Remove first rear seat. Remove the second rear seat, if equipped.
   2. Remove the sliding door sill plate.
   3. Remove the quarter trim bolster.
   4. Remove the upper C-pillar trim and D-pillar trim panel.
   5. Remove the first and second rear seat belt anchors.
   6. Remove the screws securing the quarter trim to quarter panel from the bolster area.
   7. Remove the screws securing the rear edge of the quarter trim to the support bracket.
   8. Carefully disengage the hidden clips securing the front of the quarter trim to the quarter panel just rearward of the sliding door opening.

   
   

Fig. Removing the trim panel to access the rear blower motor

i. Disconnect the wiring harness connector from the accessory power outlet, if equipped.

j. On long wheelbase wagons only, remove the quarter trim from the quarter panel and pull second rear seat belt through access hole.

k. Pull first rear seat belt through the access hole.

l. Remove the quarter trim panel from the vehicle.

3. Remove the 5 screws mounting the A/C-heater blower motor housing to the rear HVAC unit (one mounting screw located on evaporator cover).

4. Twist the blower motor out of scroll housing.

5. Disconnect the blower motor wiring connector.

6. Remove the blower motor from vehicle.


Fig. The rear blower motor is held in place by four screws
To install:

1. Install the blower motor unit into the vehicle.
2. Reconnect the blower motor wiring connector.
3. Secure the blower motor into scroll housing.
4. Install and tighten the 5 screws mounting the A/C-heater blower motor housing to the rear HVAC unit (one mounting screw located on evaporator cover).
5. Install the right quarter trim panel as follows:
   1. Install the quarter trim panel in position in the vehicle.
   2. Insert and pull the first rear seat belt through the access hole in quarter trim panel.
   3. On long wheelbase wagons only, insert and pull the second rear seat belt through access hole in quarter trim panel.
   4. Reconnect the wiring harness connector to the accessory power outlet, if equipped.
   5. Engage the hidden clips to secure the front of quarter trim to quarter panel rearward of sliding door opening.
   6. Install the retaining screws that secure the rear edge of quarter trim to support bracket.
   7. Install the retaining screws that secure the quarter trim to the quarter panel in bolster area.
   8. Install the second rear seat belt anchor (if equipped), and the first rear seat belt anchor.
   9. Install the D-pillar trim panel and upper C-pillar trim.
   10. Install the quarter trim bolster.
   11. Install the sliding door sill plate.
   12. Install the second rear seat, if equipped, and install the first rear seat.
       
6. Reconnect the negative battery cable. Check blower motor operation.

Do you have a spare key? If not call CAA I'm sorry but thats the only solution unless you know how to use a coat hanger trick

Assuming the hardtop/soft top system is operating properly-push the red switch in the console towards back of car until the top pops up. Make sure you unplug the defroster harness at the r rear of top (behind passenger seat. It will take 2 people to grab the top and pull it up and off. If this system is inoperable- there is a tool in the tool kit(if not you can buy one at the dealer-called a hard top removal tool) and unlock the 2 locks in the front of the top by the sun visors, and 2 locks located behind the seats by the quarter glass panels and the 2 locks in the rear accessible through the trunk. Your owners manual will describe how to do this procedure. I hope i have been helpful

tv is the wrong adhesive. you must use urethane with a primer. it is available at any QUALITY parts store (NAPA or Carquest comes to mind)


Material Item Specification Urethane Metal Primer Essex U-413
WSB-M2G234-C Urethane Glass Prep Essex U-401
WSB-M5B280-C Urethane Glass Primer Essex U-402
WSB-M2G314-B Urethane Adhesive Essex 400-HV
WSB-M2G316
Removal
All vehicles
WARNING: To prevent glass splinters from entering the eyes or cutting the hands, wear safety glasses and heavy gloves when cutting the glass from the vehicle.

1. Remove the C-pillar trim panels. For additional information, refer to Section 501-05.

3-Door, 5-Door

1. CAUTION: Make sure the cutting blades are changed where the cutting depth changes to avoid damage to the body and trim panels.
   NOTE: Some resistance may be encountered when cutting through the glass locating pegs in the lower corners of the glass.
   NOTE: Lubricate the existing urethane adhesive with water to aid the special tool while cutting.
   Using the special tool, place the flat side of the knife against the quarter glass window. Start at the top and work towards the corners cutting to the given maximum depths:
   1. 20 mm
   1. 60 mm
   1. 75 mm
   1. 90 mm

Wagon

1. CAUTION: Make sure the cutting blades are changed where the cutting depth changes to avoid damage to the body and trim panels.
   NOTE: Some resistance may be encountered when cutting through the glass locating pegs in the upper right and lower left corners of the glass.
   NOTE: Lubricate the existing urethane adhesive with water to aid the special tool while cutting.
   Using the special tool, place the flat side of the knife against the quarter glass window. Start at the top and work towards the corners cutting to the given maximum depths:
   1. 20 mm
   1. 30 mm
   1. 50 mm
   1. 40 mm

4-Door

1. CAUTION: Make sure the cutting blades are changed where the cutting depth changes to avoid damage to the body and trim panels.
   NOTE: Some resistance may be encountered when cutting through the glass locating pegs in the upper right and lower left corners of the glass.
   NOTE: Lubricate the existing urethane adhesive with water to aid the special tool while cutting.
   Using the special tool, place the flat side of the knife against the quarter glass window. Start at the top and work towards the corners cutting to the given maximum depths:
   1. 20 mm
   1. 25 mm
   1. 45 mm
   1. 50 mm
   1. 55 mm
   1. 70 mm
   1. 150 mm

All vehicles

1. Remove the rear quarter window glass.

1. Using a soft brush or vacuum, remove any dirt or foreign material from the pinch weld.

Installation
CAUTION: When installing urethane installed glass parts, the vehicle must not be driven until the urethane adhesive has cured. At temperatures above 21°C (70°F) and relative humidities above 50%, adequate cure time is typically 24 hours. (Refer to Essex drive away chart for the cure times as temperatures and humidity vary.) Inadequate or incorrect curing can adversely affect the retention of the quarter window glass.

1. NOTE: Avoid scratching the pinch weld.
   Trim the remaining urethane adhesive. The urethane adhesive must be smooth and free of cuts and contamination after trimming. Avoid touching the urethane adhesive after preparation.

1. Apply the urethane metal primer to any exposed or damaged metal on the pinch weld.

1. If reinstalling the original rear quarter window glass, remove the excess urethane adhesive.

1. Clean the rear quarter window glass with a non-alcohol based window cleaner.

1. CAUTION: Wipe off the urethane glass prep immediately after each application because it flash dries.
   If installing a new rear quarter window glass, apply urethane glass prep twice around the glass surface to be urethaned.

1. If installing a new rear quarter window glass, apply urethane glass primer to the same area that was prepped in the previous step. Allow 5 minutes to dry.

1. Cut the urethane adhesive applicator tip to specification.

1. Apply a bead of urethane adhesive on top of the existing urethane bead on the pinch weld. Make sure that all gaps in the urethane adhesive are smoothed into one continuous bead.

1. Position the rear quarter window glass to the flange, and press the retaining tabs into the flange to engage.

1. Install the rear quarter window glass.

1. Check the rear quarter window glass installation for air or water leaks through the urethane seal.

1. Install the C-pillar trim panels. For additional information, refer to Section 501-05.

In the trunk to the left side vertical rear quarter panel wall. Just simply remove the cover by pulling it out to access it...