Code Definition

B1004 — Lower control panel control module does not match vehicle type

System: Body  |  Type: Manufacturer-Specific  |  Make: Mercedes-Benz

About B1004

B1004 is a manufacturer-specific body diagnostic trouble code recorded for Mercedes-Benz vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1004 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1004 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This Mercedes-Benz specific code is stored when the vehicle's electronic system detects that the lower control panel control module does not match the expected vehicle type or variant configuration. On Mercedes-Benz vehicles, the lower control panel typically refers to the climate control or HVAC control panel module located below the main head unit (COMAND, Audio, or NTG system) in the centre console — this module manages heating, ventilation, air conditioning controls, and in some models also seat heating and other comfort functions. Mercedes-Benz uses SCN (Software Calibration Number) cod...

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