R53 Stalling upon first start up
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My '03 S has done this off and on for years. At times it will go for many months without the first start issue. I wonder if it has anything to do with gas formulation summer/winter. One thing I have noticed is that a start up the morning following a drive at interstate speeds usually has no issues. I'd be interested in others' experiences.
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There is a DME update available that should fix this issue, you need to either find a local Euro shop who can update the DME or you are going to pay the dealer an arm and a leg to do so.