Mercedes C117 Rear Door Lock Dust Cover Water Drain Left N/S A1177320195

Mercedes C117 Rear Door Lock Dust Cover Water Drain Left N/S is a precision body component responsible for the controlled drainage of water from the rear left door area. Thanks to its specific profile and fitment to the C117 model design, it ensures stable moisture drainage, reducing the risk of water accumulation in critical body points and improving long-term corrosion protection.

Specifications and technical data

• SKU: A1177320195
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1177320195
• Substitutable numbers: A1177320195, A 117 732 01 95
• Location on the vehicle: Rear, Left
• Part type: Door
• Category: Body Mouldings & Trims

Function and role of the rear left door water drain

The water drain in the rear left door of the Mercedes C117 is responsible for the controlled discharge of rainwater and moisture that penetrates the door structure. A properly functioning component:

• reduces the risk of water stagnation in the lower part of the door,
• limits the possibility of accelerated corrosion of sheet metal and edges,
• supports the maintenance of seal integrity and performance,
• indirectly influences acoustic comfort by reducing unwanted water splashing noises. Proper positioning in the rear left zone ensures compatibility with factory mounting holes and door geometry, which facilitates service and replacement.

Design and fitment to the Mercedes C117 body

The component belongs to the Protective and decorative strips group, however, its primary task is technical – protecting the edges and internal door structure from the effects of prolonged contact with water. The drain is designed to work with the factory water drainage system in the C117 body, which allows for maintaining:

• consistency with the original body line,
• the correct direction of water flow away from the door sills,
• stable mounting without the need for structural modifications. As a result, installation is predictable, and the risk of leaks after replacement is minimized.

Practical benefits of using an original water drain

Using an original water drain in the rear left door provides measurable operational benefits:

• Better anti-corrosion protection – an efficient drain limits prolonged contact of sheet metal with water and mud.
• Stable water drainage in rain and high-pressure washing conditions.
• Maintenance of the factory geometry and tightness of the door zone.
• Ability to restore the proper operation of the drainage system after damage or removal of the previous component. This solution is particularly important in vehicles used year-round, where frequent contact with road salt and moisture accelerates corrosion processes.

Product characteristics and service application

The rear left door water drain in the Mercedes C117 is a component intended for installation in a specific body location, which minimizes the risk of error when selecting parts. The product comes from the used components segment, which allows for economical restoration of the drainage system's efficiency while maintaining the original design specification. It is suitable for both post-accident repairs and preventive maintenance when the factory drain is damaged, deformed, or leaking. In workshop practice, such a component is often replaced during:

• body and paint repairs in the rear door zone,
• removing the effects of corrosion on lower edges,
• diagnosing water leaks into the vehicle interior.

Expansion of the body protection system and related content

If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other elements from the same group, such as covers, overlays, or additional strips, check the available parts in the Mercedes protective and decorative strips category. During service work on the body and drainage system, it is worth simultaneously taking care of the engine fuel system efficiency – a guide on the safe selection of used components, available in the article Fuel dosing problems: what to look for when buying a used injection pump and fuel rails?, may be helpful. If you are preparing your car for intensive use in difficult weather conditions, practical seasonal checklists described in the material Winter essentials: which used car parts are worth checking and replacing before the frost? may also be useful, which will allow you to better plan the inspection of elements exposed to water, salt, and low temperatures.