Just completed a major service - resealed leaking front chain case covers, replaced leaking water pump, replaced spark plugs, and replaced dying battery with a Duracell AGM battery on my 2013 E350 4matic Wagon with 157K miles. Did all this work myself with the help of Mercedes-Benz WIS and YouTube videos. BTW, the WIS is wrong on the last step for removing the intake plenum. I'll post on that in a separate thread.
The car had several DTC codes (but no check-engine light) that I thought were caused by a weak battery. Now all codes but one are gone. The check-engine light is still off. The one stubborn code that remains is P254000 and it shows as current and stored. I have the Mercedes Star Diagnostic System (SDS) with Mercedes Xentry software. The Xentry diagnostic log is attached below. It shows the fault code and the freeze frame data from the "N118 Control Unit 'Fuel Pump' (FSCU07)". The "stored" codes for the Motor Electronics (ME) control unit were triggered when I forgot to reconnect a couple of electrical connectors at the back of the intake plenum when finishing the above work. Once I plugged in the connectors, the fault codes turned from "current" to "stored." SDS refuses to delete these fault codes even though they are "stored" and not "current." Perhaps this is so because of the "current" fuel pump control unit code.
I have searched the internet for the fuel pump fault code P254000 and Mercedes w212 E350 but found little to no useful info. Can anyone decipher the Xentry log and help me troubleshoot the problem?
Any subscribers to Star TekInfo here? Could you please search P254000 and w212 on Star TekInfo and let me know if you find anything?
The car had several DTC codes (but no check-engine light) that I thought were caused by a weak battery. Now all codes but one are gone. The check-engine light is still off. The one stubborn code that remains is P254000 and it shows as current and stored. I have the Mercedes Star Diagnostic System (SDS) with Mercedes Xentry software. The Xentry diagnostic log is attached below. It shows the fault code and the freeze frame data from the "N118 Control Unit 'Fuel Pump' (FSCU07)". The "stored" codes for the Motor Electronics (ME) control unit were triggered when I forgot to reconnect a couple of electrical connectors at the back of the intake plenum when finishing the above work. Once I plugged in the connectors, the fault codes turned from "current" to "stored." SDS refuses to delete these fault codes even though they are "stored" and not "current." Perhaps this is so because of the "current" fuel pump control unit code.
I have searched the internet for the fuel pump fault code P254000 and Mercedes w212 E350 but found little to no useful info. Can anyone decipher the Xentry log and help me troubleshoot the problem?
Any subscribers to Star TekInfo here? Could you please search P254000 and w212 on Star TekInfo and let me know if you find anything?