Used Mercedes-Benz EQS Body Control Module

Yes, the Mercedes-Benz EQS (W297, launched 2021) does have a Body Control Module (BCM), sometimes referred to within Mercedes systems as part of the broader SAM (Signal Acquisition and Actuation Module) architecture — the BCM handles functions such as lighting control, door locking, and various body electronics. Because the EQS is fully electric and built on a dedicated platform, its body electronics architecture is distinct from combustion-engined Mercedes models, so parts from petrol or diesel Mercedes are very unlikely to be compatible. Always confirm the exact module reference number with the breaker against your registration.

The Mercedes-Benz EQS W297 has been in production from 2021 onwards, with a facelift introduced for the 2024 model year — this is a meaningful boundary, as facelifts often bring software or hardware revisions to body control systems. A BCM from a pre-facelift car (2021–2023) may not be directly compatible with a post-facelift 2024 car, and vice versa. Confirm with the breaker whether the part number on the donor unit matches what your registration requires before buying.

Trim and powertrain variant can influence which BCM is fitted on the EQS, because different specifications may control different features such as rear-axle steering, AMG Line lighting functions, or MBUX Hyperscreen configurations. Unlike alloy wheels, where trim rarely matters, body control electronics on a premium EV like the EQS are closely tied to the options and systems present in that specific car. Always check the part number against your registration with the breaker rather than assuming any EQS BCM will interchange freely.

The EQS saloon (W297) and the EQS SUV (X296) are closely related platforms but are distinct vehicles with different body structures, and their BCMs are unlikely to be interchangeable even where part numbers look similar. The EQS SUV was introduced in 2022 and has different body electronic functions to manage compared with the saloon. Confirm with the breaker that the part number from the donor vehicle matches exactly what your W297 registration requires.

On a modern EV like the EQS, the BCM may require coding or programming to the receiving vehicle after fitting, regardless of mileage, so the physical part being compatible is only part of the process. Software versions and coding requirements mean you will likely need a Mercedes-capable diagnostic technician to program the replacement unit to your car. Ask your breaker whether the unit has been tested and discuss programming requirements with your fitting garage before purchasing.

The MBUX Hyperscreen is a significant optional extra on the EQS that integrates with the vehicle's body electronics, and it is reasonable to expect that a BCM from a non-Hyperscreen car may lack the correct configuration for your vehicle. However, whether this difference is in the BCM itself or in a separate control unit is something to confirm with the breaker against your specific part number and registration. Do not assume a BCM from a standard-screen EQS will work correctly in a Hyperscreen-equipped car without verifying the part number first.