Category: Mercedes

Mercedes OM651 / OM654: P13DF Heater vs P20E8 Low Pressure

Mercedes OM651/OM654: P13DF Heater vs P20E8 Low Pressure If your Mercedes diesel shows P13DF or P20E8, the SCR system is warning that AdBlue heating or pump pressure isn’t working as expected. These codes often appear together and can quickly lead to “No Start in 500 miles.” Here’s how to tell…