Signal Acquisition Module Rear W164 SAM for Mercedes-Benz

Rear Signal Acquisition Module (SAM) for Mercedes-Benz W164. Central control unit for rear electrical systems and CAN-BUS gateway.

Compatible Vehicles

• Mercedes-Benz ML-Class (W164) — 2006–2011 (ML320, ML350, ML450, ML500, ML550, ML63 AMG)
• Mercedes-Benz GL-Class (X164) — 2007–2012 (GL320, GL350, GL450, GL550)
• Mercedes-Benz R-Class (W251 / V251) — 2006–2017
• Excludes vehicles with factory code 848 (no communication module)

Position: Rear — right-hand side, behind/under the rear seat cushion
Replacement part for: 1649005101

Key Features & Functions

• Controls rear lighting (turn signals, brake lights, tail lights, licence plate light, high-mounted stop lamp)
• Manages rear wiper, heated rear window, central locking, tailgate, fuel filler flap, and anti-theft alarm (ATA)
• Reads fuel-tank level sensors (1 & 2)
• Integrates trailer detection and towing-sensor functions
• Switches relays for heated rear window, trailer circuit, and electric loading floor

Common Failure Symptoms

• Rear lights not working or flickering
• Fuel gauge reading empty/full constantly
• Tailgate or fuel flap not unlocking
• Alarm system malfunctions
• Rear wiper or heated screen not responding
• CAN-B communication fault codes

Installation & Coding

Direct plug-and-play using original connectors. Module is VIN-coded to the vehicle — professional programming with Mercedes XENTRY/DAS or Vediamo is required after installation, or the module will not function correctly. Professional installation strongly recommended.

Specs

• Material: High-quality ABS plastic/metal (meets OEM specifications)
• Fit: Precision-engineered to factory mounting points
• Voltage: 12V DC

This is an aftermarket replacement part, not a genuine Mercedes-Benz product. Not affiliated with or endorsed by Mercedes-Benz Group AG.