Mercedes-Benz E-Class S211 W211 Aerial Roof Antenna Phone Telephone A2118202775

Mercedes-Benz E-Class S211 W211 Aerial Roof Antenna Phone Telephone is an original communication system component designed to work with the factory-fitted telephone kit. It ensures stable mobile network signal reception, improving voice call quality and the reliability of onboard communication systems. Thanks to its OEM design, the antenna integrates harmoniously with the roofline, maintaining a consistent body appearance and factory performance specifications.

Specifications and technical data

• SKU: A2118202775
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2118202775
• Substitutable numbers: A2118202775, A 2118202775, A 211 820 27 75, EM
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the communication system

The presented Mercedes-Benz E-Class S211 W211 Aerial Roof Antenna Phone Telephone is an external component of the telephone system, responsible for effectively collecting and transmitting radio signals to modules inside the vehicle. Mounted on the roof panel, it operates under optimal wave propagation conditions, which translates into better range and connection stability compared to solutions based solely on internal antennas.

Due to its factory geometry and fitment to the bodywork, the antenna does not require any interference with the body structure beyond the standard mounting point provided by the manufacturer. The roof seal integrity and proper routing of signal cables inside the headliner are maintained.

Construction and vehicle integration

The Mercedes-Benz E-Class S211 W211 Aerial Roof Antenna Phone Telephone has been designed as a compact module that combines the radio section with a solid mounting base. The housing is profiled for aerodynamics, which reduces air noise at higher speeds and minimizes mechanical stress on the mount.

The component is prepared for integration with the Mercedes-Benz factory installation, which means compatibility with the original wiring harnesses and connectors used in W211/S211 generation E-Class models. This configuration facilitates service, reduces the risk of installation errors, and allows for maintaining predictable electrical parameters of the entire antenna circuit.

Benefits of using an original roof antenna

Using an original roof telephone antenna in a Mercedes-Benz E-Class provides a number of practical technical benefits:

• preservation of factory signal reception and transmission characteristics in the telephone system,
• correct impedance matching to the vehicle's communication modules,
• consistent body appearance thanks to the housing shape compliant with the manufacturer's design,
• reduction of interference resulting from non-original mounting solutions.

For users who utilize the built-in telephone kit, replacing a damaged antenna with an OEM part allows for restoring full system functionality without the need for installation modifications. This is particularly important in vehicles where maintaining the original equipment configuration is a priority.

Condition, verification, and service application

The offered antenna is a used component, which in practice means it has been removed from a vehicle and verified for further serviceability. This type of part is a good solution for service repairs when the goal is to restore the communication system's efficiency while keeping costs reasonable and maintaining the vehicle's original specifications.

Replacing the roof telephone antenna is a typical service operation performed in cases of mechanical damage (e.g., after a collision or improper vehicle washing) or range issues when diagnostics indicate irregularities in the antenna circuit. Using an original module allows you to avoid experimenting with replacements of uncertain parameters.

Configuration expansion and selection of related components

If you are planning a comprehensive repair or upgrade of the roof area and communication system in your Mercedes and need other components from the same group, such as additional antenna modules, mounting adapters, or headliner fasteners, check the available parts in the Other Mercedes category.

For a comparison of solutions used in different brands and vehicle segments, and to better understand how premium manufacturers design powertrains and their accompanying systems, it is worth checking out the analysis of Audi sports models – details can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?.