Mercedes V251 SAM Body Control Module Rear Unit A1649007000

Mercedes V251 SAM Body Control Module Rear Unit is an advanced component from the Electronic control modules and controllers category, responsible for managing comfort functions in the rear of the vehicle. The original Mercedes module ensures stable communication with the car's electrical system, supporting the proper operation of related systems and reducing the risk of errors in the vehicle's network.

Specifications and technical data

• SKU: A1649007000-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1649007000
• Substitutable numbers: A1649007000, A 164 900 70 00
• Location on the vehicle: Rear
• Part type: Drive Unit Controllers
• Category: ECUs & Computer Modules

Purpose and function of the SAM comfort module

The presented comfort controller is designed to operate in the rear of the vehicle, where it acts as an intelligent distributor and electrical circuit controller. The module integrates signals from various sensors and receivers and then transmits them to other vehicle systems, which allows for:

• coordination of comfort elements in the rear zone of the car,
• consistent power management of individual circuits,
• reduction of the load on the main electrical system,
• easier fault diagnostics within the rear part of the vehicle.

Thanks to the use of an original controller from the SAM family, compatibility with the Mercedes electrical architecture is maintained, which facilitates integration with factory software and service tools.

Benefits of using an original Mercedes module

Choosing a comfort controller dedicated to Mercedes translates into a number of practical advantages in daily operation:

• Full integration with the vehicle's installation – the module works with the factory network of controllers, reducing the risk of communication conflicts.
• Stable operation of comfort systems – a correctly selected controller helps eliminate common power supply and control problems in the rear of the car.
• Simplified diagnostics – compatibility with factory service procedures allows for faster identification of any irregularities.
• Restoration of factory functionality – using the original module allows you to restore system operation to the parameters specified by the manufacturer.

Installation and operational characteristics

The SAM comfort module is intended for installation in the rear of the vehicle, in the location provided by the manufacturer. Thanks to this:

• factory mounting points and wiring harness routing are preserved,
• the need for electrical system modifications is minimized,
• installation can be carried out in an orderly and repeatable manner.

As an element from the Electronic control modules and controllers category, the comfort controller requires careful handling during installation – it is important to maintain the correct order of connecting connectors and to follow the procedures for disconnecting and connecting the vehicle's power supply. This helps avoid surges and unwanted errors in other controllers.

Why consider a used control module

A used Mercedes comfort controller is a solution that allows you to combine rational repair costs with maintaining the original electrical architecture of the vehicle. In many cases, it is an effective alternative to new components, especially in older model generations, where matching the existing hardware and software configuration is key.

To better understand the principles of selecting and installing used controllers and other vehicle electronics, it is worth reading the guide describing selection by VIN/OEM, hardware and software compatibility issues, and practical application examples: Used automotive electronics – second-hand control modules and sensors.

Expanding the control system in your Mercedes

If you are planning a comprehensive repair or upgrade of the electrical system in your Mercedes and need other elements from the same group, such as additional controllers, power management modules, or body controllers, check the available parts in the Mercedes electronic control modules and controllers category.