Features:

1. Construction Material:

   • Material: High-strength steel or aluminum, designed for durability and crash safety.
   • Finish: Typically comes primed or painted in the vehicle's color; custom painting might be required for perfect color matching.

2. Integrated Components:

   • Window Regulator: Mechanism that controls the movement of the window.
   • Door Lock Mechanism: Integrated lock system for securing the door.
   • Power Window Switch: Controls window operation if the vehicle has power windows.
   • Power Door Lock Switch: If equipped, controls the locking system from inside the vehicle.

3. Safety Features:

   • Airbag Compatibility: Designed to accommodate side-impact airbags if equipped in the original vehicle.
   • Reinforcements: Built with impact protection in line with the vehicle’s safety standards.

4. Seals and Weatherstripping:

   • Door Seals: Includes factory-installed seals to prevent water and wind leakage.

5. Wiring Harness:

   • Pre-installed Wiring: For connecting power windows, locks, and possibly other electrical components.

Specifications:

1. Dimensions:

   • Height: Designed to match the dimensions of the original door.
   • Width: Includes appropriate measurements to fit the door frame of the GL-350.
   • Depth/Thickness: Engineered to align with the vehicle’s structural and safety requirements.

2. Fitment:

   • Vehicle Fitment: Specifically for the 2009 Mercedes-Benz GL-350.
   • Side: Left side (driver's side in left-hand drive vehicles).

3. Mounting Points:

   • Hinges: Pre-drilled holes for mounting hinges to ensure correct alignment.
   • Latch Mechanism: Pre-installed or compatible with the vehicle’s original latch system.

4. Color and Finish:

   • Paint Code: Can be matched to the vehicle’s original paint code for a seamless appearance.
   • Primed/Unprimed: Depending on the supplier, it may come primed or require painting.

5. Additional Features:

   • Integrated Mirrors: May include provisions for mirror installation if the vehicle has power or heated mirrors.
   • Speaker Mounts: Designed to fit any original speaker mounts if applicable.

6. Installation:

   • OEM Fit: Ensures a factory fit for optimal performance and alignment.
   • Professional Installation Recommended: For proper alignment and integration with vehicle systems.

When sourcing this part, ensure that it is a genuine OEM part to guarantee quality and compatibility with your 2009 Mercedes-Benz GL-350. If buying a used part, check for any signs of damage or wear and verify its condition thoroughly.