My car machine readed a fault codes with Bosch system from Mercedes W205 (2014) C180 car and they have found an unknown fault code in ABS/ESP system:

fault code is: 562CFF2C

After deletion of the fault codes and reread the error codes it changed to 562CFF6C

It is also unknown for Bosch system.

What is the meaning of this code?

  • I'm guessing those are hexadecimal numbers, not error codes. My understanding of error codes; P for emissions, C for chassis, U for network and B for body codes. ABS falls under C codes. All error codes are the letter followed by four numbers. Please correct me if I'm mistaken.
    – F Dryer
    May 21, 2023 at 1:53
  • I get this error code from mechanic, they use the BOSCH ODB reader. This code is placed where C/U/B codes are common in riport (I compared to other riport). It seems to me a hexa code. Text message is unknown error. May 22, 2023 at 6:20
  • 1
    Perhaps this is a history code not affecting everyday use and can be ignored. History codes may be data for M-B use in developing in-house stats. If the CEL/MIL and/or ABS indicator is off after a reset, you're fine. However, if the engine or abs indicator remains on, you may need to go to M-B for proper diagnosis of this hex (?) code. Worse case scenario is abs is disabled but brakes are operable without abs. If electronic stability control is another feature, it would be disabled too.
    – F Dryer
    May 22, 2023 at 14:40

1 Answer 1


First off, roughly speaking, there are two kinds of DTC codes, OBD2 (4 bytes), and UDS/KWP (6 + 2 bytes). 562CFF2C is probably one of the latter kind, with 562CFF being the actual fault and 2C being the status.

That said, in contrast to OBD2 where at least the basic structure is standardized, the UDS/KWP codes are completely vendor- and ECU-specific.

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