Mercedes-Benz W211 Keyless-Go Receiver A2118203785 - Used Original Parts

Diagnosis and Common Symptoms

From the workshop floor, a failing Keyless-Go receiver on a W211 is a common source of frustration. The primary complaint is intermittent or total failure of the convenience features. You'll often see a "Key Not Detected" message on the instrument cluster, even with a new battery in the fob.

Common symptoms include:

• Push-to-start button on the gear selector becomes unresponsive.
• Inability to lock or unlock the vehicle by touching the door handles.
• The system works sporadically, often failing in cold or damp weather.
• Diagnostic scan tools will typically show fault codes related to signal reception or communication with the Keyless-Go control module, such as "B1078 - Keyless-Go Control Module Signal Implausible" or general CAN-Bus communication faults with this unit.

Introduction

This is a Genuine Mercedes-Benz Keyless-Go Receiver, salvaged and inspected here at M.S. Motor. We don't just pull parts; we diagnose the donor vehicle to ensure the component we're removing is not the source of the fault. Each receiver is bench-tested for correct signal processing and communication before being approved for sale, guaranteeing it's ready for installation.

Product Details

• Brand: Mercedes-Benz
• Model Compatibility: W211 E-Class (2003-2009). Always verify part number A2118203785 matches your original unit.
• Part Name: Keyless-Go Receiver / Antenna Control Module
• Condition: Genuine Used (Tested Working)
• Notes: This module is typically located in the trunk area. An exact part number match is critical for proper function within the vehicle's network.