Mercedes-Benz W204 Front SAM Module Fuse Relay Box - Used Original Parts

Quick Answer

This is the right fix when a W204 C-Class has electrical faults that trace back to the engine bay SAM (exterior lights, wipers, horn, starter or fuel pump feeds dropping out) and the unit shows corrosion, burnt relay seats or internal failure. A tested Genuine used unit makes sense in Malaysia because heat, humidity and monsoon water ingress are what kill these boxes. It gives you the original Mercedes-Benz hardware and fit without a long wait for a new unit.

Diagnosis and Common Symptoms

The Front SAM (N10/1, Signal Acquisition and Actuation Module with fuse and relay module) sits in the W204 engine bay. It distributes power and switches many of the car's main loads. Because it is exposed to moisture and heat cycling, failures are usually corrosion on the circuit board, cracked solder joints, or burnt relay and fuse contacts.

Typical symptoms on the W204:

• Intermittent or total loss of low beam, high beam, fog or daytime running lights, sometimes with a "Check headlamp" message on the cluster
• Wipers or washer pump working randomly or not at all
• Horn not working or sounding by itself
• Engine cranking intermittently or not at all, with no start while the battery and starter are healthy
• Fuel pump or ignition feed dropping out, causing stalling or long cranking
• Warning lights appearing together (ESP, ABS, battery) when supply voltage is unstable
• Battery drain overnight from a SAM that does not go to sleep
• Multiple unrelated electrical faults appearing together after a wash or heavy rain

Diagnosis in XENTRY or Star Diagnosis often shows stored faults against N10/1, lamp circuit faults, or CAN communication faults (U-codes) involving the SAM. Before condemning the module, check the main fuses, battery terminals, ground points and connector pins for green or white corrosion. If the faults follow the module, or the board shows water damage, replacement is the correct repair.

Introduction

This is a Genuine used Front SAM Module with Fuse Relay Box, removed from a Mercedes-Benz W204 C-Class. It is an original Mercedes-Benz part, not an aftermarket copy. Each unit is bench and function tested before listing, and checked for corrosion, burnt contacts and connector damage. You get a proven original module at a fraction of the cost and lead time of a new dealer unit.

Product Details

• Brand: Mercedes-Benz

• Model Compatibility: W204 C-Class (2007–2014), including C180, C200, C250 and C300 variants. Confirm by part number before ordering.

• Part Name: Front SAM Module (N10/1) with Fuse and Relay Box

• Condition: Genuine Used (Tested Working)

• Notes: The module is variant and VIN coded. After installation it must be configured with XENTRY or an equivalent tool to match your car's equipment. Match the Mercedes-Benz part number on the module label, because SAM units differ by engine, lighting type and year. Inspect connector pins and the seal before fitting, and fix any water leak in the engine bay so the failure does not repeat.