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
1Original wording in English
MERCEDES-BENZ
Reported code forms P1B9D28
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (MBUSA) is extending the warranty coverage for the pressure…
Check vehicle applicability
18A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mercedes-Benz | AMG GLC43 | 2020 |
| Mercedes-Benz | AMG GLC43 | 2019 |
| Mercedes-Benz | AMG GLC43 | 2018 |
| Mercedes-Benz | AMG GLC63 | 2020 |
| Mercedes-Benz | AMG GLC63 | 2019 |
| Mercedes-Benz | AMG GLC63 | 2018 |
| Mercedes-Benz | AMG GLC63 S | 2020 |
| Mercedes-Benz | AMG GLC63S | 2019 |
| Mercedes-Benz | AMG GLC63S | 2018 |
| Mercedes-Benz | GLC 300 | 2020 |
| Mercedes-Benz | GLC 300 | 2019 |
| Mercedes-Benz | GLC 300 | 2018 |
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.