The GLC 405 ABS Luggage Carrier is a rooftop luggage carrier / roof‑rack designed to mount on top of cars / MPVs / SUVs. It acts as a “cargo‑carrier” — allowing you to carry extra luggage, boxes or items on the roof of your car, freeing up interior space.The GLC 405 uses ABS blow‑moulded plastic for its side, front, and rear frames. ABS (Acrylonitrile Butadiene Styrene) is known for strength, impact resistance, and durability — so the carrier is designed to withstand regular use, impacts, and exposure to the elements.

Under the ABS shell, there’s a welded round‑steel tube assembly (with anti‑rust coating) to provide structural support. This combination — molded plastic exterior + steel internal frame — aims to balance rigidity, strength, and weather resistance.

The mounting brackets are also surface-treated / anti‑rust coated. According to the product page, the side‑body and rear mounting brackets are fabricated and treated to resist corrosion, which helps with long-term durability even under rain, dust, or humid conditions.