2004 Mercedes Benz C240 Consistent Engine Problem

  • 2004 MERCEDES BENZ C240
  • 160,000 MILES
Three of the past four years as the temperature changes to cold the car behaves the same way. It cranks but will not start at first in the morning. Once it does it is fine starting for the rest of the day. I have learned from the previous times not to flood the engine, since in the past it has resulted in the expense of replacing all the plugs and wire. When this happened last year, at the same time, my local import shop made the repairs but I had to visit a dealership to have the computer reset to original settings for it to continue to work. There is also a problem, three of the past four years, that as the summer months arrive, the Mass Air Flow/Crank Sensor has to be replaced. As a side note, in 2008 I visited a Dealership for the first non-warranty oil change; a week later there was oil in the engine and it had to be replaced. The Dealership accepted no responsibility, other than to make the repairs in conjunction with my insurance company, as I had Engine Failure Insurance.
Thanking you in advance for any guidance.
Do you
have the same problem?
Friday, November 8th, 2013 AT 2:01 PM

1 Reply

That is an interesting situation. Has anyone checked to see if the fuel pump pressure is within the manufacturer's specs when it is hard starting? Since the car runs fine after the first start, it almost seems like there is a fuel pressure issue. I have seen pumps that are affected by the cold temps in the same manner. As far as the MAF and crank sensor being replaced, can you tell me what the car was doing at that time? It is VERY odd that both went bad at the same time.
Was this
Friday, November 8th, 2013 AT 5:02 PM

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