URO 1267300378 Door Seal - Rear Left

Rear Left Door Seal for Mercedes-Benz W126

This URO rear left door seal is a direct-fit replacement for select Mercedes-Benz W126 sedans, including the 1981-1991 Mercedes-Benz 380SEL, 500SEL, 560SEL, 420SEL, 300SEL, 300SDL, and 350SDL. Built with EPDM rubber and an OE-style profile, it helps restore a tight door-to-body seal on the rear left door.

Part number 1267300378 is made for owners looking for a precise Mercedes-Benz 300SEL rear left door seal, Mercedes-Benz 560SEL rear left door weatherstrip, or a replacement for worn factory sealing on W126 chassis vehicles.

• Guaranteed fitment for listed applications
• EPDM rubber construction resists water intrusion and airborne debris
• OE-style seal profile helps reduce door squeaks and wind noise
• Smooth sealing surface resists sticking between the door and body
• Heat- and UV-resistant material for long-term service
• 24 Month Unlimited Mileage Warranty

Detailed Product Information

This door seal is engineered for the rear left position on compatible Mercedes-Benz sedans from 1981 through 1991. It is a practical replacement for aging or compressed weatherstripping on the Mercedes-Benz 380SEL, 500SEL, 560SEL, 420SEL, 300SEL, 300SDL, and 350SDL. The part number 1267300378 cross-references URO-001098 for the same application.

Common Problems This Part Can Address

• Water entering the cabin through a worn rear door seal
• Wind noise around the rear left door
• Door squeaks caused by hardened or flattened weatherstripping
• Debris intrusion at the door opening
• Sticking or dragging from deteriorated seal surfaces

Installation Notes

Before installation, inspect the door frame and sealing channel for old adhesive, dirt, or corrosion. Clean the mounting surface thoroughly so the new seal seats evenly. Verify rear left fitment against your vehicle’s year and model before installation on Mercedes-Benz 300SEL, 560SEL, or other listed W126 applications.

Quality Assurance

URO backs this door seal with a 24 Month Unlimited Mileage Warranty. The EPDM rubber construction is selected for resistance to heat, UV exposure, water, and airborne contaminants, supporting consistent sealing performance over time.