Mercedes V177 Bumper Absorber Outer Radar Sensor Rear Left N/S A1778851504

The Mercedes V177 Rear Left Outer Bumper Radar Sensor Absorber is an original mounting component designed for precise sensor placement within the bumper. Thanks to its factory geometry and fit to the vehicle's body structure, it ensures stable mounting, which translates to the correct operation of driver assistance systems and maintains the proper geometry of the vehicle's rear section.

Specifications and technical data

• SKU: A1778851504
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1778851504
• Substitutable numbers: A1778851504, A 177 885 15 04
• Location on the vehicle: Rear, Left
• Category: Mounts, Brackets & Hardware

Purpose and Function of the Component

The rear left outer bumper radar sensor absorber is dedicated to the V177 body type and is responsible for the stable, repeatable positioning of the sensor relative to the bumper skin. Correct placement is crucial for the proper calibration of assistance systems, such as parking assistants or rear-view monitoring systems.

The component belongs to the Brackets, Mountings, and Mounting Parts group, meaning its primary role is to provide adequate rigidity and protection for the mounted sensor, while also absorbing some energy from minor impacts to the rear body section.

Construction and Body Fitment

The absorber has been specifically designed for installation in the rear left part of the vehicle, taking into account the bumper's shape and the routing of the radar sensor wiring. The bracket's construction allows for:

• precise sensor seating in the manufacturer-designated location,
• maintaining a constant distance between the sensor and the bumper surface,
• minimizing unwanted vibrations and shifts during driving.

Its original Mercedes origin promotes the retention of factory operating parameters for electronic systems and minimizes the risk of calibration issues after rear body repairs.

Application in Repair Processes

Replacing the absorber is recommended whenever the rear bumper has been damaged, even if the radar sensor itself remains functional. A deformed or cracked bracket can cause:

• incorrect readings from assistance systems,
• electronic diagnostic errors,
• unstable sensor mounting in the bumper.

Selecting the correct mounting component according to the manufacturer's designations ensures consistency with service documentation and facilitates future vehicle maintenance at authorized service centers.

Benefits of Using an Original Mercedes Bracket

Using an original rear left outer bumper radar sensor absorber provides a range of practical benefits:

• Compatibility with Factory Safety Systems – maintaining the sensor's manufacturer-intended position.
• Structural Consistency – fitting the shape of the bumper and adjacent mounting components.
• Simplified Installation – with designated mounting points and geometry matching the V177 body.

A used component allows for an economical yet technically correct repair of the vehicle's rear section, especially in cases of minor parking damage.

Part Selection by Numbers and Technical Support

When selecting brackets, mountings, and other mounting parts for premium vehicles, it is advisable to use manufacturer designations and service documentation. Specialized guides on finding original components by identification numbers can also be helpful – this is further described in the article The Five-Cylinder Audi Engine – A Legend from Quattro to RS3 and How to Care for it with Original Audi Parts, which discusses practical principles for selecting used OEM parts by numbers and catalog comparisons.

If you are planning a comprehensive repair or upgrade of the rear section of your Mercedes and need other parts from the same group, such as additional brackets, supports, or bumper mounting elements, check the available parts in the Mercedes Brackets, Mountings, and Mounting Parts category.