Mercedes W221 Rear Bench Seat Back Arm Rest Phone Module Mount A2218200251

The Rear Phone Module Holder in the Rear Seat Backrest Armrest for Mercedes W221 is an original interior component designed for installation in the rear of the vehicle. It provides a stable mounting for the phone module in the armrest, maintaining factory functionality and the cohesive look of the S-Class interior.

Specifications and technical data

• SKU: A2218200251
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218200251
• Substitutable numbers: A2218200251, A 221 820 02 51, A2218200651, A 221 820 06 51
• Location on the vehicle: Rear
• Category: Seat Belts & Parts

Application and Function in the Mercedes W221

The presented phone module holder in the rear seat armrest is intended for installation in the rear of the W221 generation Mercedes S-Class. This part ensures a secure, factory-standard seating for the phone module within the rear seat backrest, allowing rear passengers convenient access to the phone system.

The holder is part of the interior equipment system, working in conjunction with the factory armrest and the vehicle's installation. This preserves the original ergonomics of operation and the premium aesthetic characteristic of the brand.

Construction and Fitment

As an element from the original Mercedes line, the holder is designed for precise fitment with the rear seat backrest structure of the W221. The placement of mounting points and the holder's geometry align with the manufacturer's factory specifications, facilitating installation and eliminating the need for modifications.

Its placement in the rear of the vehicle allows for:

• stable mounting of the phone module in the rear seat backrest armrest,
• maintaining full functionality of the rear passenger zone,
• a cohesive interior finish consistent with the Mercedes factory standard.

Benefits of Using an Original Holder

Using the original phone module holder in the Mercedes W221 offers several practical benefits:

• Factory Fitment – the component is precisely matched to the rear seat backrest structure, simplifying installation and reducing the risk of improper seating.
• Secure Module Mounting – stable retention of the phone module in the armrest minimizes vibrations and accidental displacement during driving.
• Compatibility with Interior Equipment – the holder works seamlessly with the original upholstery and rear seat accessories.
• Professional Cabin Appearance – maintaining the uniform styling of the S-Class interior, without visible modifications.

Category: Seat Belts and Parts – Significance of Rear-Mounted Components

Although the phone module holder is an interior component, it falls under the broader category of "Seat Belts and Parts", which includes components installed in the rear zone of the vehicle. The correct selection and installation of such elements are crucial for:

• rear seat ergonomics – convenient access to phone functions for passengers,
• order in the passenger space – the phone module has its designated, fixed location,
• maintaining factory safety standards – absence of loose elements within the rear seat area.

If you are looking for other Mercedes seat belts and parts for your vehicle, check out our dedicated category: Mercedes Seat Belts and Parts.

Condition, Origin, and Part Selection

The offered holder is an original used part, sourced from disassembly. This type of OEM part ensures compliance with Mercedes factory specifications while being an economical solution compared to new components.

When selecting a holder for your W221, it is advisable to consider:

• compatibility with the body version and equipment,
• placement in the rear of the vehicle,
• intended use for installation in the rear seat backrest armrest.

More practical tips on selecting used interior components and comfort modules can be found in an article on our blog: Air Conditioning and Heating – Part Selection and Maintenance for Year-Round Comfort, where we discuss, among other things, the principles of selecting used OEM components in premium vehicles.