Mercedes-Benz W204 Rear SAM Control Module 2045451601 - Used Original Parts

Diagnosis and Common Symptoms

From our workshop's diagnostic perspective, a failing Rear Signal Acquisition Module (SAM) on the W204 chassis presents a distinct and frustrating set of electrical faults. Typically, the vehicle will log communication errors with the rear control unit or specific circuit faults. Common diagnostic trouble codes (DTCs) scanned via XENTRY or equivalent tools include faults related to tail lamp circuits, fuel level sensors, and antenna amplifiers.

Symptoms we frequently observe include:

• Inoperative or erratic tail lights, brake lights, and turn signals (often isolated to one side).
• Dashboard warnings such as "Check Rear Brake Lamp" or "Rear Turn Signal Failure".
• The fuel gauge providing an incorrect reading or dropping to empty intermittently.
• Failure of the remote trunk release mechanism.
• Intermittent faults with the central locking system for the rear doors.
• Radio reception issues tied to the antenna amplifier, which is managed by the Rear SAM.

Introduction

This is a Genuine Mercedes-Benz Rear SAM Control Module, meticulously removed from a donor vehicle. At M.S. Motor, we understand that reliability is non-negotiable; therefore, each module undergoes a comprehensive bench test to verify full functionality of all circuits before being stocked. This unit offers a dependable and cost-effective solution compared to a new part from the dealership, without compromising on original factory performance.

Product Details

• Brand: Mercedes-Benz
• Model Compatibility: W204 C-Class (2007-2014, including C180, C200, C250, C300, C350, & C63 AMG)
• Part Name: Rear Signal Acquisition and Actuation Module (SAM) / Rear Fuse Box
• Condition: Genuine Used (Tested Working)
• Notes: Before installation, we strongly advise inspecting the trunk area, specifically the right-hand side boot liner and spare wheel well, for any signs of water ingress, as this is the primary cause of original module failure. Ensure the source of any leak is rectified to prevent damage to this replacement unit.