Is MB Re-mapping the E-550 Coupe?
Recently I had my 2012 E-550 coupe in the dealership for some warranty work. When it was finished, the service adviser told me that they had performed a software update to my car. He said the update was to allow the E-550 to run ANY grade of gasoline ???? Supposedly so many people had begun using Regular (87 Octane) that MB needed to update the mapping to avoid any "pinging". Immediately my car seemed to have less power and darn sure the MPG dropped very noticeably. And NO, I did not switch grades of gasoline. I continue using Premium. I complained to the service advisor and he said that once a flash is done - it can not be undone.
I would GREATLY appreciate the input from other members who have experienced this upgrade or who have any knowledge about it. And lastly, how can it be undone and my engine returned to its original power, performance and MPG.
I would speak to the service manager, and also be ready to call MB North America. If they performed the reflash service with out your consent. Try the nice approach first and if that doesnt work, well Im sure you have heard the term "the sqeaky wheel gets the grease". They did alter your cars performance. I would demand they reset the car back to its factory settings.
The dealer said to bring it in tomorrow so they can find out what happened. The flash was called "performance enhancement". Maybe it was flashed for a 350 instead of a 550 - who knows. I will update the forum when I have more info.
It was campaign number 2013110002. The specific wording is " MB has determined that the fuel system module software does not correspond to current production configuration". Sure sounds like gibberish to me.
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