What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
4Original wording in English
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms B19C804
Complaint <p> After a software update, the MBUX multimedia system (A26/17) may incorrectly display the fault code B19C804 "Software tampering has been detected. There is an internal fault". </p> <p> </p> <p> Note: If…
MERCEDES-BENZ
Reported code forms B19C804
MBUX multimedia system: Head unit does not start-up at ignition or resets during a drive cycle with B19C804 / B227D00 DTCs
MERCEDES-BENZ
Reported code forms B19C804
MBUX multimedia system: Head unit does not start-up at ignition or resets during a drive cycle with B19C804 / B227D00 DTCs
MERCEDES-BENZ
Reported code forms B19C804
MBUX multimedia system: DTC B19C804 stored after software update
Check vehicle applicability
103A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mercedes-Benz | A 220 | 2022 |
| Mercedes-Benz | A 220 | 2021 |
| Mercedes-Benz | A 220 | 2020 |
| Mercedes-Benz | A 220 | 2019 |
| Mercedes-Benz | AMG A35 | 2021 |
| Mercedes-Benz | AMG A35 | 2020 |
| Mercedes-Benz | AMG CLA35 | 2024 |
| Mercedes-Benz | AMG CLA35 | 2023 |
| Mercedes-Benz | AMG CLA35 | 2022 |
| Mercedes-Benz | AMG CLA35 | 2021 |
| Mercedes-Benz | AMG CLA35 | 2020 |
| Mercedes-Benz | AMG CLA45 | 2024 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.