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2009 C300 Car Won't start

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Old 02-01-2018, 05:13 PM
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2009 C300 Car Won't start

I have been having trouble starting the Car. Door unlocks and locks. Checked Battery, fuses everything is fine. After some playing around started then 2 weeks later same car would not start. Finally took to dealer here is what they said

They suspect it's something to do with my key, and suggested that I get a new one and have them program it to my car, but said they can't guarantee that's going to solve what ever the problem was. They wanted to charge me $485 for a new key and programming - but no guarantee that will fix the problem.
Car starts fine now but I am sure this will happen again.

Any help shedding some light would be greatly appreciated.
Old 02-02-2018, 02:17 PM
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2012 C300
Does it crank and not start or does it not crank?
Old 02-02-2018, 03:58 PM
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Originally Posted by Windsor Calm
Does it crank and not start or does it not crank?
Nothing. something to do with key or ignition
Old 02-02-2018, 08:39 PM
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2012 C300
Could be anti theft issue. If the dealer or an indie mercedes mechanic put a Mercedes specific code reader on it, they could read the stored codes and do diagnostics on it to get to the heart of the issue. I don't like throwing parts at it.
Old 02-02-2018, 08:44 PM
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Also sounds like you're a new dealer
Old 02-02-2018, 08:49 PM
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just for ha-has, try jigiling the gearshift lever or see if it will start in neutral
Old 02-02-2018, 10:52 PM
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C300 Sport
Possible EIS failure.

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