sorcer

Hi,
I have a new problem with my 2010 c250 cdi (150kw) : a few months ago while driving check engine light lit up. I have a elm327 tester in the care and the ecu gave egr back pressure sensor error. I deleted the error, the check engine went off and since then it didn't reappear and there is no error in ecu, but the car doesn't perform as before, it accelerate slower and lacks the power , it seems like a regula 130hp c220. Also I noticed that sometimes the car accelerates better than other times . Also it;s not in limp mode, the revs are not limited to 3000 rpm or any other value. Could the sensor give wrong reading thus limiting the power or does the egr need to be replaced?

Plutoe

I am very confused, The EGR system works until the engine warms to a predetermined point------whats your real issue, now if its functioning all the time then have the system checked with real factory or equal software,

sorcer

Yesterday I had the car checked with mercedes star c3 and xentry software and there is no error saved on ecu. Also I made the tests available in xentry and all the values are in normal range.