URO 1237300178 Door Seal - Rear Left

Mercedes-Benz 300D Rear Left Door Seal

This URO door seal is a direct-fit sealing component for the rear left door on 1977-1985 Mercedes-Benz 300D models. It is built with EPDM rubber to help block water and airborne debris while maintaining an OE-style seal profile for a clean door closure.

• Fits 1977-1985 Mercedes-Benz 300D, rear left
• EPDM rubber construction resists water intrusion and airborne debris
• OE-style profile helps reduce door squeaks and wind noise
• Smooth sealing surface helps prevent sticking between the door and body
• Heat- and UV-resistant material for long-term exterior use
• Part number 1237300178 for direct identification

Sealing Performance and Fitment

URO 1237300178 is made for the rear left door opening on Mercedes-Benz 300D sedans from 1977 through 1985. The shaped seal follows the original-style contour to support consistent compression at the door frame, helping maintain a tight closure and stable cabin sealing. This part cross-references URO-000943 and 955 33105 738 for the same application.

Common Issues This Part Helps Address

• Water entering the cabin through the rear door opening
• Wind noise around the rear left door
• Door squeaks caused by worn or hardened sealing material
• Sticking or drag between the door and body at the seal surface
• Cracked, flattened, or UV-damaged original door weatherstrip

Installation Notes

Remove the old seal and clean the door jamb and mating surface before installation. Check the full perimeter for proper alignment so the seal seats evenly and the door closes without excess force. Confirm fitment by matching the rear left position on your Mercedes-Benz 300D and verifying the part number 1237300178 before installation.

Quality Assurance

URO 1237300178 uses long-life EPDM rubber and carries a 24 Month Unlimited Mileage Warranty.