Replacing the windshield on a 2021 Mercedes-Benz GLE-Class should be performed by a professional auto glass technician or a certified auto glass shop, given the complexity and specific requirements of luxury vehicles like the GLE-Class. Here’s a general overview of the process:

1. Assessment: The technician begins by assessing the condition of the windshield. They will determine if the damage can be repaired or if a complete windshield replacement is necessary.

2. Gather Supplies: The technician gathers the necessary supplies, including the new windshield, automotive-grade sealant, and any other required parts or materials.

3. Safety Precautions: Proper safety measures are taken, such as wearing safety glasses, gloves, and other personal protective equipment.

4. Removal of Old Windshield:

   • The old windshield is carefully removed using specialized tools designed to cut through the sealant that holds the windshield in place.
   • Special care is taken to prevent any damage to the vehicle’s frame, paint, or delicate components during the removal process.

5. Cleaning and Preparation:

   • The area where the new windshield will be installed is thoroughly cleaned to ensure a proper seal.
   • Any rust, corrosion, or contaminants are addressed to ensure a smooth and secure fit.

6. Installation of New Windshield:

   • The new windshield is carefully positioned and adhered in place using suitable automotive-grade sealant. This sealant creates a waterproof and airtight bond.
   • Excess sealant is typically removed, and the installation is inspected to ensure it’s flush and secure.

7. Curing Time:

   • The sealant requires time to cure and set properly. The curing time may vary depending on the type of sealant used.

8. Clean-Up and Inspection:

   • The technician should inspect the work to ensure there are no issues with the seal, alignment, or any damage to the vehicle’s exterior or interior.

9. Testing:

   • The new windshield is tested to ensure it is properly sealed and that there are no leaks or issues with visibility.

10. Interior Cleaning: Any debris or dirt that entered the vehicle during the replacement is carefully cleaned from the interior, preserving the luxury of the vehicle.

In the case of a 2021 Mercedes-Benz GLE-Class, you should choose a reputable auto glass service or technician with experience working on luxury vehicles. These professionals can also provide guidance on any specific features or technologies integrated into the windshield, such as sensors for advanced driver assistance systems (ADAS). These sensors may need calibration or reprogramming after the windshield replacement to ensure they function correctly. Proper installation is vital for your safety and the overall integrity of your luxury vehicle.