Mercedes Benz Control Module

Your Mercedes Benz control modules that command the systems in your car; from keeping your engine running to opening and closing your convertible top, these modules operate most of the electrical systems.

It is important to have these modules checked to keep your car working and avoid costly repairs. If your Mercedes has a warning light without any related issues, or multiple warning lights at the same time it may be caused by a faulty control module or modules.

At time of service a Mercedes Benz diagnostic scanner is used to retrieve fault codes. It also checks the connections between the control modules and systems. If there are any problems with a module, it may be possible to update firmware and reprogram before buying a new one. Usually your computer system will acknowledge internal faults that arise through the diagnostic port. If the modules are unable to register the exact reason for the fault, German Car Depot specialists will have to perform an inspection. At time of inspection the technician will diagnosis the problem and be able to follow the a logical repair path. It may be that a part is not functioning properly or connecting with the module that controls it.

If there is a known issue happening to other owners, Mercedes will issue a service bulletin to repair centers. If an update is needed the module can be “flashed” with the newest release of software to resolve your problem.

Types of Mercedes Benz control modules and their functions:

Most modern Mercedes have 50 or more control modules.

ECU – Engine control module This module connects the sensors and electrical parts of your engine

TCU – Transmission control module This module controls the transmission and sensors to the transmission and gear box

BCM – Body control module This module along with door control modules or convertible top modules control the electrical systems that deal with body components. The components control the lights, doors, locks, and instrument cluster along with other components in the interior.

ABS – Anti Lock Brake module This module controls your electronic braking safety systems and traction control of your car.

In older models, the braking system was called SBC ( Sensortronic Brake Control) SRS- Supplemental Restraint System module This module controls your airbags, seat belts, and crash sensors of your car.

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