Mercedes R172 Wheel Arch Cover Rear Left N/S Inner Lining Panel A1726900400

Mercedes R172 Left Rear Wheel Arch Liner A1726900400 is an original body part from the Mudguards group, designed for installation in the rear left part of the vehicle. It provides effective protection of the wheel arch and sill area against water, mud, and minor mechanical damage, stabilizing the operating conditions of suspension and body components. This is a solution for users who expect precise fitment and preservation of the original body geometry in their Mercedes.

Specifications and technical data

• SKU: A1726900400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1726900400
• Substitutable numbers: A1726900400, A 172 690 04 00
• Location on the vehicle: Rear, Left
• Offset (ET):
• Category: Splash Guards & Mud Flaps

Purpose and Function of the Left Rear Wheel Arch Liner

The presented wheel arch liner is specifically designed for installation in the rear – left side of the body. Its function is to limit direct contact of the wheels with the body's structural elements, which reduces the risk of corrosion, paint damage, and dirt accumulation in the wheel arch area.

The appropriately profiled geometry of the wheel arch liner supports:

• controlled drainage of water and mud from the wheel well,
• protection of the inner surfaces of the fender and sills,
• maintenance of stable operating conditions for suspension components in the wheel area,
• preservation of a cohesive body line consistent with the manufacturer's design.

Construction and Fitment for Mercedes R172

The wheel arch liner is manufactured as a dedicated component for the Mercedes R172 platform, which translates to factory-perfect fitment with the vehicle's mountings and body shape. Appropriate embossing, mounting points, and edge profiling allow for installation without the need for vehicle structure modification.

This precise fitment allows for:

• correct adhesion to the inner part of the fender,
• stable mounting at factory points,
• reduction of unwanted vibrations and noise during driving,
• maintenance of an aesthetically pleasing wheel well appearance.

Characteristics of a Used Part

The offered wheel arch liner is a used part, meaning it comes from a dismantled vehicle and may show signs of wear typical for this class of component. This type of component is a good choice when the priority is to maintain the original construction and fitment while optimizing repair costs.

Choosing a used OEM wheel arch liner allows for:

• maintaining compliance with the vehicle's factory specifications,
• preserving original mounting points and geometry,
• reducing the risk of installation problems typical for universal aftermarket replacements.

Importance of a Proper Wheel Arch Liner in Vehicle Operation

A functional left rear wheel arch liner in a Mercedes R172 contributes to long-term protection of the body and suspension components. It limits the direct impact of external factors on metal structural parts, which is important for many years of vehicle operation, especially in urban and winter conditions.

Key benefits include:

• reduced risk of corrosion in the wheel arch and sill area,
• less dirt accumulation on mechanical components around the wheel,
• more stable operating conditions for mountings and shields,
• maintenance of the vehicle's utility value through preservation of the body structure.

If you are planning a comprehensive repair or upgrade of the wheel arch area in your Mercedes and need other parts from the same group, such as mud flaps, additional protective panels, or inner wheel arch liners, check the available parts in the Mercedes Mudguards category.

For users interested in selecting original body parts and underbody protection based on manufacturer codes and compatibility with specific engine or equipment versions, practical tips on identifying OEM parts can be helpful – you can find them in the article Audi's Five-Cylinder Engine – A Legend from Quattro to RS3 and How to Care for It with Original Audi Parts.