Unless this car is such a great deal that its once in a lifetime, I'd try to find something else. If there is a new batt, and still nothing, there is a loss of power from the battery to the ECU. Only other thing is make sure the connections are clean. Also check under the hood and make sure nothing is loose. But seriously, this sounds like a major headache.Unless this X is a perfect 02 4.6is with little mileage and only $10k, I wouldnt touch it. Just my $.02

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2011 E70 50i M Sport