Mercedes W251 Trim Rear Door Right O/S Window Frame Black A2517350871

The Mercedes W251 Rear Left Door Window Frame Trim Black is a precisely fitted body part from the Cladding, decorative strips and decorations group, designed for installation in the rear side area of the vehicle. The black window frame provides an aesthetic finish to the door edges and stable guidance for the seal, improving the visual coherence of the vehicle's side line. This solution is dedicated to users expecting factory fit and solid construction.

Specifications and technical data

• SKU: A2517350871
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517350871
• Substitutable numbers: A2517350871, A 251 735 08 71, A2517370400, A 251 737 04 00
• Location on the vehicle: Rear, Right
• Color: Black
• Category: Trim

Purpose and Function of the Part

The rear side door window frame trim is responsible for the correct bordering of the window and stabilizing its position relative to the door panel. In a Mercedes W251 vehicle, this element contributes to the body's side line, influencing:

• maintaining the correct geometry of the window edge in relation to the seal,
• limiting vibrations and unwanted play around the glass,
• a visually cohesive flow of the decorative line along the side of the body.

Its placement in the rear right side of the vehicle means the part operates in an area particularly exposed to temperature changes, humidity, and dirt, therefore, the appropriate construction of the frame is important for the durability of the entire door assembly.

Construction, Color Scheme, and Fit

The black color of the frame is neutral and technically justified – it effectively masks operational dirt and visually integrates with seals and tinted windows. This ensures the entire side area of the vehicle maintains an orderly, cohesive appearance, without contrasts that hinder visual matching with other body elements.

The part belongs to the Cladding, decorative strips and decorations group, meaning that in addition to its structural function, it also serves an aesthetic role – it tidies up edges, covers sheet metal and seal connections, and improves the visual appeal of the rear of the vehicle. Using a solution dedicated to a specific body series reduces the risk of installation problems and leaks.

Operational and Installation Characteristics

As a part intended for the rear right body area, the frame works with the window mechanism and door seal. A correctly selected part facilitates:

• maintaining an even gap between the window and the door frame,
• reducing air flow noise during driving,
• maintaining a stable window position with repeated opening and closing of the doors.

The used nature of the component allows for an economical replacement of a damaged or corroded trim while maintaining original geometry and compatibility with the factory mounting system. This is a practical solution for post-accident repairs or restoring the vehicle to a factory-like condition.

Application in Service Practice

Replacing the window frame is particularly recommended when there are problems with the window closing, visible deformation of the door edges, or leaks in the rear of the body. Using a dedicated trim allows for the restoration of:

• correct window guidance in the channels,
• an aesthetic finish to the door edges,
• visual coherence of the vehicle's side line after bodywork repairs.

For body and paint shops, as well as workshops specializing in the Mercedes brand, this is a part that enables repairs to be carried out according to the manufacturer's specifications, without the need for universal solutions.

If you are planning a comprehensive repair or modernization of the side door area in your Mercedes and need other parts from the same group, such as covers, overlays, or additional trims, check the available parts in the category Cladding, decorative strips and decorations Mercedes.

Additional Technical Support

When working on the body and doors, there is often a need for parallel inspection of the suspension condition, which affects the body geometry and door closing. If you want to expand your knowledge on the diagnostics and operation of suspension components, it is worth consulting the guide: Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers. This will help you plan a more complete vehicle service, combining bodywork with checks of key driving components.